chore: consolidate all in-progress parallel-session WIP

Wholesale commit of every uncommitted change across the tree, at the user's explicit request — host refactor-campaign W1 (native.rs facade + native/ dir, library/ + mgmt/ splits), Android, core. These streams were mid-flight and not individually built/tested together; this supersedes the per-session HOLD markers. Consolidating so everything lands on main in one pass. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
feat(apple/M1): PunktfunkWidgetsExtension target — wired, signed, building
2026-07-16 20:08:29 +02:00 · 2026-07-16 19:54:12 +02:00 · 2026-07-16 19:52:34 +02:00 · 2026-07-16 19:49:52 +02:00 · 2026-07-16 19:18:26 +02:00 · 2026-07-16 18:53:39 +02:00
749 changed files with 177573 additions and 12212 deletions
@@ -0,0 +1,18 @@
+# Workspace-wide build flags.
+#
+# aes_armv8: RustCrypto's `aes` 0.8.x enables ARMv8-Crypto hardware AES on aarch64 only behind
+# this cfg (x86_64 AES-NI is runtime-detected with no flag; the 0.9 line will make aarch64
+# automatic too). Without it every aarch64 client (all Apple + virtually all Android) ran
+# SOFTWARE AES on the per-packet decrypt path — measured 2026-07-14 on an M3 Ultra at
+# ~240 MiB/s/core (~7 µs per 1.4 KB datagram), which single-handedly capped receive throughput
+# at ~1.57 Gbps wire. The cfg still runtime-detects via `cpufeatures`, so a chip without the
+# extensions falls back safely.
+#
+# NOTE: a RUSTFLAGS environment variable OVERRIDES config rustflags entirely — build scripts /
+# CI lanes that set RUSTFLAGS for aarch64 targets (cargo-ndk, xcframework) must carry
+# `--cfg aes_armv8` themselves.
+# polyval_armv8: same story for GCM's other half — `polyval` 0.6.x gates its PMULL (carry-less
+# multiply) GHASH path behind this cfg on aarch64. AES alone took open_in_place from 240 to
+# ~790 MiB/s on the M3 Ultra; software GHASH still dominated until this flag joined it.
+[target.'cfg(target_arch = "aarch64")']
+rustflags = ["--cfg", "aes_armv8", "--cfg", "polyval_armv8"]
@@ -38,3 +38,8 @@ CLAUDE.md
 # Local flatpak-builder output (build-flatpak.sh) — ostree repo + build dir at the repo root.
 .flatpak-repo/
 .flatpak-build/
+
+# Nix build outputs (flake.nix) — `nix build` result symlinks + direnv cache. flake.lock IS tracked.
+/result
+/result-*
+.direnv/
@@ -30,6 +30,16 @@ file with `scripts/gen-third-party-notices.sh` when the dependency tree changes.

 ## Before you push

+Enable the repo git hooks once per clone — they run the exact rustfmt gates CI runs (main
+workspace + the UMDF driver workspace) on every commit and push, so a push can never fail CI
+on formatting alone:
+
+```sh
+git config core.hooksPath scripts/git-hooks
+```
+
+Then the usual full pass:
+
 ```sh
 cargo fmt --all --check
 cargo clippy --workspace --all-targets -- -D warnings
@@ -2145,7 +2145,7 @@ dependencies = [

 [[package]]
 name = "latency-probe"
-version = "0.10.1"
+version = "0.12.0"

 [[package]]
 name = "lazy_static"
@@ -2277,7 +2277,7 @@ checksum = "0ceec5bc11778974d1bcb055b18002eba7f4b3518b6a0081b3af5f21666da9ad"

 [[package]]
 name = "loss-harness"
-version = "0.10.1"
+version = "0.12.0"
 dependencies = [
 "punktfunk-core",
 ]
@@ -2756,9 +2756,10 @@ checksum = "9b4f627cb1b25917193a259e49bdad08f671f8d9708acfd5fe0a8c1455d87220"

 [[package]]
 name = "pf-client-core"
-version = "0.10.1"
+version = "0.12.0"
 dependencies = [
 "anyhow",
+ "ash",
 "async-channel",
 "ffmpeg-next",
 "mdns-sd",
@@ -2766,6 +2767,7 @@ dependencies = [
 "pf-ffvk",
 "pipewire",
 "punktfunk-core",
+ "pyrowave-sys",
 "rustls",
 "sdl3",
 "serde",
@@ -2778,7 +2780,7 @@ dependencies = [

 [[package]]
 name = "pf-console-ui"
-version = "0.10.1"
+version = "0.12.0"
 dependencies = [
 "anyhow",
 "ash",
@@ -2799,7 +2801,7 @@ dependencies = [

 [[package]]
 name = "pf-ffvk"
-version = "0.10.1"
+version = "0.12.0"
 dependencies = [
 "ash",
 "bindgen",
@@ -2808,7 +2810,7 @@ dependencies = [

 [[package]]
 name = "pf-presenter"
-version = "0.10.1"
+version = "0.12.0"
 dependencies = [
 "anyhow",
 "ash",
@@ -2992,7 +2994,7 @@ dependencies = [

 [[package]]
 name = "punktfunk-client-android"
-version = "0.10.1"
+version = "0.12.0"
 dependencies = [
 "android_logger",
 "jni",
@@ -3008,7 +3010,7 @@ dependencies = [

 [[package]]
 name = "punktfunk-client-linux"
-version = "0.10.1"
+version = "0.12.0"
 dependencies = [
 "anyhow",
 "async-channel",
@@ -3024,7 +3026,7 @@ dependencies = [

 [[package]]
 name = "punktfunk-client-session"
-version = "0.10.1"
+version = "0.12.0"
 dependencies = [
 "anyhow",
 "pf-client-core",
@@ -3039,7 +3041,7 @@ dependencies = [

 [[package]]
 name = "punktfunk-client-windows"
-version = "0.10.1"
+version = "0.12.0"
 dependencies = [
 "async-channel",
 "ffmpeg-next",
@@ -3058,7 +3060,7 @@ dependencies = [

 [[package]]
 name = "punktfunk-core"
-version = "0.10.1"
+version = "0.12.0"
 dependencies = [
 "aes-gcm",
 "bytes",
@@ -3089,7 +3091,7 @@ dependencies = [

 [[package]]
 name = "punktfunk-host"
-version = "0.10.1"
+version = "0.12.0"
 dependencies = [
 "aes",
 "aes-gcm",
@@ -3117,9 +3119,11 @@ dependencies = [
 "nvidia-video-codec-sdk",
 "openh264",
 "opus",
+ "parking_lot",
 "pf-driver-proto",
 "pipewire",
 "punktfunk-core",
+ "pyrowave-sys",
 "quinn",
 "rand 0.8.6",
 "rcgen",
@@ -3161,7 +3165,7 @@ dependencies = [

 [[package]]
 name = "punktfunk-probe"
-version = "0.10.1"
+version = "0.12.0"
 dependencies = [
 "anyhow",
 "mdns-sd",
@@ -3175,21 +3179,29 @@ dependencies = [

 [[package]]
 name = "punktfunk-tray"
-version = "0.10.1"
+version = "0.12.0"
 dependencies = [
 "anyhow",
 "ksni",
 "libc",
+ "punktfunk-core",
 "rustls",
 "serde",
 "serde_json",
- "sha2",
 "ureq",
 "windows 0.62.2 (registry+https://github.com/rust-lang/crates.io-index)",
 "windows-service",
 "winresource",
 ]

+[[package]]
+name = "pyrowave-sys"
+version = "0.12.0"
+dependencies = [
+ "bindgen",
+ "cmake",
+]
+
 [[package]]
 name = "quick-error"
 version = "1.2.3"
@@ -10,6 +10,7 @@ members = [
    "crates/pf-console-ui",
    "crates/pf-ffvk",
    "crates/pf-driver-proto",
+    "crates/pyrowave-sys",
    "clients/probe",
    "clients/linux",
    "clients/session",
@@ -35,7 +36,7 @@ exclude = [
 ndk = { path = "clients/android/native/vendor/ndk" }

 [workspace.package]
-version = "0.10.1"
+version = "0.12.0"
 edition = "2021"
 rust-version = "1.82"
 license = "MIT OR Apache-2.0"
@@ -10,7 +10,7 @@
      "name": "MIT OR Apache-2.0",
      "identifier": "MIT OR Apache-2.0"
    },
-    "version": "0.9.1"
+    "version": "0.11.0"
  },
  "paths": {
    "/api/v1/clients": {
@@ -2043,11 +2043,12 @@
      },
      "ApiCodec": {
        "type": "string",
-        "description": "Video codec identifier.",
+        "description": "Video codec identifier. The wire token matches the codec's canonical name used across the\nstack (SDP/GameStream advertisement, the stats-capture `CaptureMeta.codec`, and the encoder's\n[`Codec::label`]) — notably `H.265` serializes as `\"hevc\"`, not `\"h265\"`, so the same codec\nreads identically on every console page.",
        "enum": [
          "h264",
-          "h265",
-          "av1"
+          "hevc",
+          "av1",
+          "pyrowave"
        ]
      },
      "ApiDisplayInfo": {
@@ -2811,6 +2812,7 @@
          "app_version",
          "gfe_version",
          "codecs",
+          "gamestream",
          "ports"
        ],
        "properties": {
@@ -2831,6 +2833,10 @@
            },
            "description": "Codecs the host can encode (NVENC)."
          },
+          "gamestream": {
+            "type": "boolean",
+            "description": "Whether the GameStream/Moonlight-compat planes are running (`--gamestream`). `false` on the\nsecure default (native punktfunk/1 only) — a console can hide Moonlight-only UI (e.g. the\nMoonlight PIN pairing card, which could never receive a PIN when this is `false`)."
+          },
          "gfe_version": {
            "type": "string",
            "description": "GFE version advertised to Moonlight clients."
@@ -3393,9 +3399,16 @@
          "video_streaming",
          "audio_streaming",
          "pin_pending",
-          "paired_clients"
+          "paired_clients",
+          "active_sessions"
        ],
        "properties": {
+          "active_sessions": {
+            "type": "integer",
+            "format": "int32",
+            "description": "Number of live streaming sessions across BOTH planes (GameStream + native punktfunk/1). The\nnative server admits concurrent sessions, so this can exceed 1; `session`/`stream` below\ndescribe a single representative session for the detail card.",
+            "minimum": 0
+          },
          "audio_streaming": {
            "type": "boolean",
            "description": "True while the audio stream thread is running."
@@ -3417,7 +3430,7 @@
              },
              {
                "$ref": "#/components/schemas/SessionInfo",
-                "description": "The active launch session (set by Moonlight's `/launch`, cleared on cancel/stop)."
+                "description": "A representative active session. GameStream's launch (Moonlight `/launch`) when present, else\nthe first live native session. `null` when nothing is streaming."
              }
            ]
          },
@@ -3428,7 +3441,7 @@
              },
              {
                "$ref": "#/components/schemas/StreamInfo",
-                "description": "The RTSP-negotiated stream parameters (present once a client has completed ANNOUNCE)."
+                "description": "The active stream's parameters — RTSP-negotiated for GameStream, or the live native session's\nmode/codec/bitrate. `null` when nothing is streaming."
              }
            ]
          },
@@ -3599,6 +3612,7 @@
          "armed",
          "sample_count",
          "started_unix_ms",
+          "elapsed_ms",
          "kind"
        ],
        "properties": {
@@ -3606,6 +3620,12 @@
            "type": "boolean",
            "description": "Capture currently running."
          },
+          "elapsed_ms": {
+            "type": "integer",
+            "format": "int64",
+            "description": "Host-measured elapsed time of the in-progress capture, in ms (`0` if idle). Computed from the\nhost's MONOTONIC clock, so a console can show elapsed time without subtracting `started_unix_ms`\nfrom its own (possibly skewed) wall clock.",
+            "minimum": 0
+          },
          "kind": {
            "type": "string",
            "description": "Path of the in-progress capture (`\"\"` if idle)."
@@ -27,6 +27,10 @@
    <uses-permission android:name="android.permission.RECORD_AUDIO" />
    <!-- Gamepad rumble feedback. -->
    <uses-permission android:name="android.permission.VIBRATE" />
+    <!-- Steam Controller 2 over direct BLE (Sc2BleLink talks Valve's vendor GATT service to the
+         bonded pad). A RUNTIME permission (NEARBY_DEVICES group); the capture engages only when
+         already granted — USB capture (wired / Puck dongle) needs no Bluetooth at all. -->
+    <uses-permission android:name="android.permission.BLUETOOTH_CONNECT" />

    <!-- We target phone + TV from day one: keep the app installable on TV (no touchscreen) and on
         devices without a gamepad. -->
@@ -40,6 +44,10 @@
         ethernet-only boxes declare no wifi (discovery/WifiLock are best-effort hedges there). -->
    <uses-feature android:name="android.hardware.microphone" android:required="false" />
    <uses-feature android:name="android.hardware.wifi" android:required="false" />
+    <!-- Steam Controller 2 capture: USB host for the wired pad / Puck dongle, Bluetooth for the
+         direct-BLE pad — both optional (the feature quietly disengages without them). -->
+    <uses-feature android:name="android.hardware.usb.host" android:required="false" />
+    <uses-feature android:name="android.hardware.bluetooth_le" android:required="false" />

    <!-- appCategory="game": a game-streaming client IS a game as far as the SoC is concerned.
         On Snapdragon devices (and other OEMs with a Game Mode / Game Dashboard) this makes the app
@@ -65,10 +73,16 @@
            android:name="android.game_mode_config"
            android:resource="@xml/game_mode_config" />

+        <!-- configChanges includes `keyboard` (not just keyboardHidden): claiming a Steam
+             Controller 2's USB HID interface removes its lizard-mode keyboard/mouse input
+             devices, which flips CONFIG_KEYBOARD (QWERTY→NOKEYS) — without `keyboard` declared,
+             Android RECREATES the activity, disposing StreamScreen and killing the stream the
+             moment the capture engages (tester-diagnosed on-glass, 2026-07-15). Releasing the
+             interfaces at session end brings the devices back — same flip, same need. -->
        <activity
            android:name=".MainActivity"
            android:exported="true"
-            android:configChanges="orientation|screenSize|keyboardHidden|screenLayout|density|navigation"
+            android:configChanges="orientation|screenSize|keyboard|keyboardHidden|screenLayout|density|navigation"
            android:theme="@style/Theme.PunktfunkAndroid">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
@@ -303,7 +303,8 @@ internal fun PairPinDialog(
                            if (fp.isNotEmpty()) {
                                onPaired(fp) // verified host fp — caller saves + connects
                            } else {
-                                err = "Pairing failed — wrong PIN, or the host isn't armed."
+                                // Cause-specific: wrong PIN vs not-armed vs unreachable.
+                                err = ConnectErrors.pairMessage(NativeBridge.nativeTakeLastError())
                            }
                        }
                    }
@@ -0,0 +1,69 @@
+package io.unom.punktfunk
+
+import io.unom.punktfunk.kit.NativeBridge
+
+/**
+ * Cause-specific user-facing messages for failed pair/connect attempts, keyed on the stable
+ * machine token from [NativeBridge.nativeTakeLastError]. One vocabulary for both the PIN
+ * ceremony and the request-access (delegated approval) path, so a dead network path is never
+ * reported as "wrong PIN" and an operator denial is never reported as a timeout — the exact
+ * collapse behind more than one support thread.
+ */
+object ConnectErrors {
+    /** Message for a failed SPAKE2 PIN ceremony ([NativeBridge.nativePair] returned `""`). */
+    fun pairMessage(token: String): String = when (token) {
+        "crypto" -> "Wrong PIN — check the PIN on the host's Pairing page and try again."
+        else -> shared(token) ?: transport(token)
+    }
+
+    /**
+     * Message for a failed connect / request-access ([NativeBridge.nativeConnect] returned `0`).
+     * [requestAccess] tunes the fallback wording for the delegated-approval path.
+     */
+    fun connectMessage(token: String, requestAccess: Boolean): String =
+        shared(token) ?: when (token) {
+            "crypto" ->
+                "The host's identity doesn't match the saved fingerprint — re-pair with this host."
+            "timeout", "io", "" ->
+                if (requestAccess) {
+                    "The request never reached the host, or nobody approved it in time — " +
+                        "check the network path (no VPN, no guest-Wi-Fi isolation) and the " +
+                        "host's console."
+                } else {
+                    transport(token)
+                }
+            else -> "Connection failed — check host/port and logcat."
+        }
+
+    /** The host's typed rejection reasons — identical wording across every punktfunk client. */
+    private fun shared(token: String): String? = when (token) {
+        "not-armed" ->
+            "Pairing isn't armed on the host — arm it on the host's Pairing page, then try again."
+        "bound-other" ->
+            "The host's pairing window is armed for a different device — arm it for this one."
+        "rate-limited" -> "Too many pairing attempts — wait a couple of seconds and try again."
+        "identity-required" ->
+            "The host requires pairing — pair this device (PIN or request access) first."
+        "denied" -> "The host declined this device's request."
+        "approval-timeout" ->
+            "Nobody approved the request on the host in time — approve this device in the " +
+                "host's console or web UI, then request access again."
+        "superseded" ->
+            "A newer request from this device replaced this one — approve the latest request " +
+                "on the host."
+        "wire-version" -> "Client and host versions don't match — update both to the same release."
+        "busy" -> "The host is busy with another session."
+        else -> null
+    }
+
+    /** Transport-level causes (nothing typed arrived from the host). */
+    private fun transport(token: String): String = when (token) {
+        "timeout" ->
+            "The host didn't answer — check that this device and the host are on the same " +
+                "network (no VPN on this device, no guest-Wi-Fi / AP isolation)."
+        "io" ->
+            "Couldn't reach the host — check that this device and the host are on the same " +
+                "network (no VPN on this device, no guest-Wi-Fi / AP isolation)."
+        else -> "Pairing failed — the host didn't answer or closed the connection (see logcat)."
+    }
+}
@@ -305,13 +305,17 @@ fun ConnectScreen(
                onConnected(handle)
            } else {
                discovery.start()
-                if (onFailure != null) {
-                    // Hand off to the wake-and-wait flow — clearing `attempt` above and setting
-                    // `waker.waking` here land in one recompose, so the overlay slides
+                val token = NativeBridge.nativeTakeLastError()
+                val unreachable = token == "timeout" || token == "io" || token.isEmpty()
+                if (onFailure != null && unreachable) {
+                    // Unreachable — hand off to the wake-and-wait flow — clearing `attempt` above
+                    // and setting `waker.waking` here land in one recompose, so the overlay slides
                    // Connecting → Waking without a blank frame.
                    onFailure()
                } else {
-                    status = "Connection failed — check host/port, PIN, and logcat"
+                    // A typed host rejection (busy / versions differ / pairing required) means the
+                    // host is awake — waking it would be nonsense; show the stated reason instead.
+                    status = ConnectErrors.connectMessage(token, requestAccess = false)
                }
            }
        }
@@ -416,7 +420,12 @@ fun ConnectScreen(
                }
                onConnected(handle)
            } else {
-                status = "Request timed out — approve this device in the host's console, then retry."
+                // Cause-specific: an operator denial, an approval timeout, and a request that
+                // never reached the host are different problems with different fixes.
+                status = ConnectErrors.connectMessage(
+                    NativeBridge.nativeTakeLastError(),
+                    requestAccess = true,
+                )
                discovery.start()
            }
        }
@@ -1,5 +1,6 @@
 package io.unom.punktfunk

+import android.content.Context
 import android.hardware.input.InputManager
 import android.os.Build
 import android.os.CombinedVibration
@@ -44,6 +45,7 @@ import androidx.compose.ui.Modifier
 import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.unit.dp
 import io.unom.punktfunk.kit.Gamepad
+import io.unom.punktfunk.kit.Sc2Capture
 import kotlinx.coroutines.delay

 /**
@@ -147,8 +149,38 @@ fun ControllersScreen(gamepadSetting: Int, onBack: () -> Unit) {
    ) {
        Text("Controllers", style = MaterialTheme.typography.headlineMedium)

+        // Steam Controller 2 detection: never an InputDevice (lizard mode is kb/mouse; the
+        // capture claims even those away), so it's enumerated on the capture side — USB device
+        // list + bonded BLE — and re-checked on USB hot-plug.
+        var sc2Generation by remember { mutableIntStateOf(0) }
+        DisposableEffect(Unit) {
+            val receiver = object : android.content.BroadcastReceiver() {
+                override fun onReceive(c: Context?, i: android.content.Intent?) { sc2Generation++ }
+            }
+            val filter = android.content.IntentFilter().apply {
+                addAction(android.hardware.usb.UsbManager.ACTION_USB_DEVICE_ATTACHED)
+                addAction(android.hardware.usb.UsbManager.ACTION_USB_DEVICE_DETACHED)
+            }
+            if (Build.VERSION.SDK_INT >= 33) {
+                context.registerReceiver(receiver, filter, Context.RECEIVER_NOT_EXPORTED)
+            } else {
+                @Suppress("UnspecifiedRegisterReceiverFlag")
+                context.registerReceiver(receiver, filter)
+            }
+            onDispose { runCatching { context.unregisterReceiver(receiver) } }
+        }
+        val sc2Probe = remember { Sc2Capture(context) }
+        val sc2Usb = remember(sc2Generation) { sc2Probe.findUsbDevice() }
+        val sc2Ble = remember(sc2Generation) {
+            if (context.checkSelfPermission(android.Manifest.permission.BLUETOOTH_CONNECT) ==
+                android.content.pm.PackageManager.PERMISSION_GRANTED
+            ) sc2Probe.pairedBleAddress() else null
+        }
+        val sc2Present = sc2Usb != null || sc2Ble != null
+
        Group("Gamepads") {
-            if (pads.isEmpty()) {
+            if (sc2Present) Sc2Row(sc2Usb, activity)
+            if (pads.isEmpty() && !sc2Present) {
                Text(
                    "No controller detected. punktfunk can only forward devices Android " +
                        "classifies as a gamepad or joystick — a pad connected through an adapter " +
@@ -214,6 +246,79 @@ fun ControllersScreen(gamepadSetting: Int, onBack: () -> Unit) {
    }
 }

+/**
+ * The Steam Controller 2 card — capture-side state, since a (claimed or lizard-mode) SC2 never
+ * appears as a gamepad InputDevice. Shows the transport, whether the capture is live (driving
+ * these menus now; streamed as-is in a session), and a grant button when USB access is missing.
+ */
+@Composable
+private fun Sc2Row(usbDev: android.hardware.usb.UsbDevice?, activity: MainActivity?) {
+    val context = LocalContext.current
+    val settingOn = remember { SettingsStore(context).load().sc2Capture }
+    val active = activity?.sc2MenuActive == true
+    val usbManager = context.getSystemService(Context.USB_SERVICE) as android.hardware.usb.UsbManager
+    val permitted = usbDev != null && usbManager.hasPermission(usbDev)
+    OutlinedCard(modifier = Modifier.fillMaxWidth()) {
+        Column(
+            modifier = Modifier.padding(16.dp),
+            verticalArrangement = Arrangement.spacedBy(6.dp),
+        ) {
+            Row(modifier = Modifier.fillMaxWidth(), verticalAlignment = Alignment.CenterVertically) {
+                Text(
+                    "Steam Controller 2",
+                    style = MaterialTheme.typography.bodyLarge,
+                    modifier = Modifier.weight(1f),
+                )
+                if (active) {
+                    Text(
+                        "navigating this UI",
+                        style = MaterialTheme.typography.labelSmall,
+                        color = MaterialTheme.colorScheme.primary,
+                    )
+                }
+            }
+            Text(
+                when {
+                    usbDev == null -> "Paired via Bluetooth"
+                    usbDev.productId == io.unom.punktfunk.kit.Sc2Device.PID_WIRED -> "Wired (USB)"
+                    else -> "Puck dongle (USB)"
+                },
+                style = MaterialTheme.typography.bodySmall,
+                color = MaterialTheme.colorScheme.onSurfaceVariant,
+            )
+            when {
+                !settingOn -> Text(
+                    "Passthrough is disabled in Settings — enable \"Steam Controller 2 " +
+                        "passthrough\" to capture it.",
+                    style = MaterialTheme.typography.bodySmall,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                )
+                active -> Text(
+                    "Captured — streams as-is: the host presents a real Steam Controller 2 " +
+                        "that its Steam drives directly (trackpads, gyro, haptics).",
+                    style = MaterialTheme.typography.bodySmall,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                )
+                usbDev != null && !permitted -> {
+                    Text(
+                        "Needs USB access to be captured.",
+                        style = MaterialTheme.typography.bodySmall,
+                        color = MaterialTheme.colorScheme.onSurfaceVariant,
+                    )
+                    OutlinedButton(onClick = { activity?.startSc2MenuNav(forceAsk = true) }) {
+                        Text("Grant USB access")
+                    }
+                }
+                else -> Text(
+                    "Detected — capture engages automatically.",
+                    style = MaterialTheme.typography.bodySmall,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                )
+            }
+        }
+    }
+}
+
 /** One detected gamepad: identity, what it streams as, and a rumble test. */
@Composable
 private fun PadRow(dev: InputDevice, forwarded: Boolean, gamepadSetting: Int) {
@@ -389,6 +494,8 @@ private fun prefLabel(pref: Int): String = when (pref) {
    Gamepad.PREF_STEAMDECK -> "Steam Deck"
    Gamepad.PREF_DUALSENSEEDGE -> "DualSense Edge"
    Gamepad.PREF_SWITCHPRO -> "Switch Pro"
+    Gamepad.PREF_STEAMCONTROLLER2 -> "Steam Controller 2"
+    Gamepad.PREF_STEAMCONTROLLER2_PUCK -> "Steam Controller 2 Puck"
    else -> "Automatic"
 }

@@ -351,7 +351,12 @@ fun GamepadPairPinDialog(pt: PendingTrust, identity: ClientIdentity?, onPaired:
                NativeBridge.nativePair(pt.host, pt.port, id.certPem, id.privateKeyPem, pin, name)
            }
            pairing = false
-            if (fp.isNotEmpty()) onPaired(fp) else err = "Pairing failed — wrong PIN, or the host isn't armed."
+            if (fp.isNotEmpty()) {
+                onPaired(fp)
+            } else {
+                // Cause-specific: wrong PIN vs not-armed vs unreachable.
+                err = ConnectErrors.pairMessage(NativeBridge.nativeTakeLastError())
+            }
        }
    }

@@ -49,12 +49,14 @@ import androidx.compose.ui.draw.clip
 import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.graphics.graphicsLayer
 import androidx.compose.ui.platform.LocalConfiguration
+import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.text.style.TextOverflow
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.unit.sp
 import dev.chrisbanes.haze.HazeState
 import dev.chrisbanes.haze.hazeSource
+import io.unom.punktfunk.kit.deviceBodyVibrator

 // The gamepad-driven settings screen — the Android mirror of the Apple client's GamepadSettingsView:
 // the couch-relevant subset of the touch settings restyled as a console page and fully navigable with
@@ -82,7 +84,10 @@ fun GamepadSettingsScreen(
    var s by remember { mutableStateOf(initial) }
    fun update(next: Settings) { s = next; onChange(next) }

-    val rows = buildSettingsRows(s, ::update)
+    val context = LocalContext.current
+    // Gates the "Rumble on this phone" row — a TV box has no body vibrator to mirror onto.
+    val hasBodyVibrator = remember { deviceBodyVibrator(context) != null }
+    val rows = buildSettingsRows(s, hasBodyVibrator, ::update)
    var focus by remember { mutableIntStateOf(0) }
    if (focus > rows.lastIndex) focus = rows.lastIndex
    // The direction the focused value last stepped (+1 forward / -1 back) — drives which way the
@@ -257,8 +262,13 @@ private fun SettingRowView(row: GpRow, focused: Boolean, adjustDir: Int, onClick
    }
 }

-/** Build the console settings rows from the current [Settings], writing through [update]. */
-private fun buildSettingsRows(s: Settings, update: (Settings) -> Unit): List<GpRow> {
+/** Build the console settings rows from the current [Settings], writing through [update].
+ * [hasBodyVibrator] gates the "Rumble on this phone" row (absent on TVs). */
+private fun buildSettingsRows(
+    s: Settings,
+    hasBodyVibrator: Boolean,
+    update: (Settings) -> Unit,
+): List<GpRow> {
    fun <T> choice(
        id: String, header: String?, label: String, detail: String,
        options: List<Pair<T, String>>, current: T, write: (T) -> Unit,
@@ -354,7 +364,18 @@ private fun buildSettingsRows(s: Settings, update: (Settings) -> Unit): List<GpR
            "The virtual pad the host creates — Automatic matches this controller.",
            GAMEPAD_OPTIONS.mapIndexed { i, lbl -> i to lbl }, s.gamepad,
        ) { update(s.copy(gamepad = it)) },
-
+    ) + listOfNotNull(
+        if (hasBodyVibrator) {
+            toggle(
+                "phoneRumble", null, "Rumble on this phone",
+                "Also play controller 1's rumble on this phone's own vibration motor — " +
+                    "for clip-on pads without rumble motors.",
+                s.rumbleOnPhone,
+            ) { update(s.copy(rumbleOnPhone = it)) }
+        } else {
+            null
+        },
+    ) + listOf(
        choice(
            "hud", "Interface", "Statistics overlay",
            "How much the overlay shows: Compact (one line) → Normal → Detailed (full HUD). " +
@@ -10,6 +10,7 @@ import android.os.Looper
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.DisposableEffect
 import androidx.compose.runtime.State
+import androidx.compose.runtime.derivedStateOf
 import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.remember
 import androidx.compose.ui.platform.LocalContext
@@ -46,6 +47,10 @@ fun isTvDevice(context: Context): Boolean {
@Composable
 fun rememberControllerConnected(): State<Boolean> {
    val context = LocalContext.current
+    // A menu-captured Steam Controller 2 counts as connected: it drives the console UI through
+    // the capture link, but never surfaces as an Android InputDevice (lizard mode is kb/mouse,
+    // and the claim removes even those) — the InputManager path below can't see it.
+    val activity = context as? MainActivity
    val connected = remember { mutableStateOf(Gamepad.firstPad() != null) }
    DisposableEffect(Unit) {
        val im = context.getSystemService(Context.INPUT_SERVICE) as InputManager
@@ -59,5 +64,7 @@ fun rememberControllerConnected(): State<Boolean> {
        connected.value = Gamepad.firstPad() != null
        onDispose { im.unregisterInputDeviceListener(listener) }
    }
-    return connected
+    return remember {
+        derivedStateOf { connected.value || activity?.sc2MenuActive == true }
+    }
 }
@@ -1,8 +1,16 @@
 package io.unom.punktfunk

+import android.app.PendingIntent
+import android.content.BroadcastReceiver
+import android.content.Context
+import android.content.Intent
+import android.content.IntentFilter
+import android.content.pm.PackageManager
+import android.hardware.usb.UsbManager
 import android.os.Build
 import android.os.Bundle
 import android.view.InputDevice
+import android.view.KeyCharacterMap
 import android.view.KeyEvent
 import android.view.MotionEvent
 import androidx.activity.ComponentActivity
@@ -20,6 +28,9 @@ import io.unom.punktfunk.kit.GamepadRouter
 import io.unom.punktfunk.kit.Keymap
 import io.unom.punktfunk.kit.NativeBridge

+/** Broadcast action for the menu-time SC2 USB-permission grant (see [MainActivity.startSc2MenuNav]). */
+private const val SC2_MENU_PERMISSION = "io.unom.punktfunk.SC2_MENU_USB_PERMISSION"
+
 class MainActivity : ComponentActivity() {
    /**
     * The active stream session handle (0 = not streaming). Set by [StreamScreen] while it's shown.
@@ -73,6 +84,30 @@ class MainActivity : ComponentActivity() {
    /** The panel's highest-refresh display mode (0 = unknown/unsupported), resolved once at startup. */
    private var highRefreshModeId = 0

+    /**
+     * Menu-time Steam Controller 2 capture (UI mode — no router): a captured SC2 never produces
+     * ordinary gamepad events (lizard mode is kb/mouse; the claim removes even those), so this
+     * drives the console UI directly from the parsed reports via [sc2NavKey]. Runs while the app
+     * is foreground and NOT streaming; StreamScreen pauses it around its own stream-mode capture.
+     * [sc2MenuActive] is observed by the console-UI gate ([rememberControllerConnected]) and the
+     * Controllers screen.
+     */
+    private var sc2Menu: io.unom.punktfunk.kit.Sc2Capture? = null
+    var sc2MenuActive by mutableStateOf(false)
+        private set
+    private var sc2Receiver: BroadcastReceiver? = null
+    private var sc2PermissionAsked = false
+
+    /**
+     * Compose focus hook for the SC2's synthetic D-pad (set by [onCreate]'s composition). A
+     * synthetic KeyEvent dispatched from OUTSIDE the real input pipeline never reaches
+     * ViewRootImpl's focus-navigation stage — the one that grants initial focus for a real
+     * pad's first D-pad press — so on a phone in touch mode it lands on a focus-less window
+     * and does nothing (first on-glass run: only B worked, since it bypasses key events
+     * entirely). `FocusManager.moveFocus` is the public API for exactly this.
+     */
+    private var sc2MoveFocus: ((androidx.compose.ui.focus.FocusDirection) -> Boolean)? = null
+
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        lastPadIsGamepad = !isTvDevice(this)
@@ -90,13 +125,166 @@ class MainActivity : ComponentActivity() {
        // UI without a physical pad — `adb shell am start -n io.unom.punktfunk/.MainActivity --ez
        // pf_force_gamepad_ui true`. Never set in normal use; real activation is a connected pad / TV.
        val forceGamepadUi = intent?.getBooleanExtra("pf_force_gamepad_ui", false) ?: false
+        // SC2 hot-plug + the menu-time USB-permission grant both (re)start the menu capture.
+        val receiver = object : BroadcastReceiver() {
+            override fun onReceive(c: Context?, intent: Intent?) {
+                when (intent?.action) {
+                    UsbManager.ACTION_USB_DEVICE_ATTACHED -> {
+                        sc2PermissionAsked = false // a fresh attach may ask once again
+                        startSc2MenuNav()
+                    }
+                    SC2_MENU_PERMISSION -> {
+                        if (intent.getBooleanExtra(UsbManager.EXTRA_PERMISSION_GRANTED, false)) {
+                            startSc2MenuNav()
+                        }
+                    }
+                }
+            }
+        }
+        sc2Receiver = receiver
+        val filter = IntentFilter().apply {
+            addAction(UsbManager.ACTION_USB_DEVICE_ATTACHED)
+            addAction(SC2_MENU_PERMISSION)
+        }
+        if (Build.VERSION.SDK_INT >= 33) {
+            registerReceiver(receiver, filter, Context.RECEIVER_NOT_EXPORTED)
+        } else {
+            @Suppress("UnspecifiedRegisterReceiverFlag")
+            registerReceiver(receiver, filter)
+        }
        setContent {
            PunktfunkTheme {
+                // Focus hook for the SC2's synthetic navigation (see [sc2MoveFocus]). `Next` is
+                // the bootstrap: directional moves need an already-focused node, while one-
+                // dimensional traversal assigns initial focus when there is none.
+                val focusManager = androidx.compose.ui.platform.LocalFocusManager.current
+                androidx.compose.runtime.DisposableEffect(Unit) {
+                    sc2MoveFocus = { dir ->
+                        focusManager.moveFocus(dir) ||
+                            focusManager.moveFocus(androidx.compose.ui.focus.FocusDirection.Next)
+                    }
+                    onDispose { sc2MoveFocus = null }
+                }
                Surface(modifier = Modifier.fillMaxSize()) { App(forceGamepadUi = forceGamepadUi) }
            }
        }
    }

+    override fun onResume() {
+        super.onResume()
+        startSc2MenuNav()
+    }
+
+    override fun onPause() {
+        // Release the claim while backgrounded so the OS (and other apps) get the pad back.
+        stopSc2MenuNav()
+        super.onPause()
+    }
+
+    override fun onDestroy() {
+        sc2Receiver?.let { runCatching { unregisterReceiver(it) } }
+        sc2Receiver = null
+        stopSc2MenuNav()
+        super.onDestroy()
+    }
+
+    /**
+     * Engage the menu-time SC2 capture if possible: setting on, not streaming, and a wired/Puck
+     * pad attached (asking for USB permission at most once per attach — [forceAsk] re-arms the
+     * dialog, for the Controllers screen's explicit grant button) — else an already-paired BLE
+     * controller when BLUETOOTH_CONNECT is granted. Safe to call repeatedly.
+     */
+    fun startSc2MenuNav(forceAsk: Boolean = false) {
+        if (forceAsk) sc2PermissionAsked = false
+        if (streamHandle != 0L) return // StreamScreen owns the pad while streaming
+        if (sc2Menu?.isActive == true) return
+        if (!SettingsStore(this).load().sc2Capture) return
+        val cap = sc2Menu ?: io.unom.punktfunk.kit.Sc2Capture(this).also { c ->
+            c.onUiKey = { key, down -> runOnUiThread { sc2NavKey(key, down) } }
+            c.onActiveChanged = { on -> runOnUiThread { sc2MenuActive = on } }
+            sc2Menu = c
+        }
+        val usbManager = getSystemService(Context.USB_SERVICE) as UsbManager
+        val dev = cap.findUsbDevice()
+        when {
+            dev != null && usbManager.hasPermission(dev) -> cap.startUsb(dev)
+            dev != null && !sc2PermissionAsked -> {
+                sc2PermissionAsked = true
+                usbManager.requestPermission(
+                    dev,
+                    PendingIntent.getBroadcast(
+                        this, 1,
+                        Intent(SC2_MENU_PERMISSION).setPackage(packageName),
+                        // MUTABLE: the USB stack appends the grant extras to this intent.
+                        PendingIntent.FLAG_MUTABLE,
+                    ),
+                )
+            }
+            dev == null && checkSelfPermission(android.Manifest.permission.BLUETOOTH_CONNECT) ==
+                PackageManager.PERMISSION_GRANTED -> {
+                cap.pairedBleAddress()?.let { cap.startBle(it) }
+            }
+        }
+    }
+
+    /** Release the menu-time SC2 capture (backgrounded / stream taking over). Idempotent. */
+    fun stopSc2MenuNav() {
+        sc2Menu?.stop()
+        sc2MenuActive = false
+    }
+
+    /**
+     * One SC2 navigation key transition from the menu-time capture (main thread) — routed the
+     * same way [dispatchKeyEvent]'s not-streaming branch routes a real pad's buttons: B backs,
+     * A activates the focused element, everything else (D-pad, shoulders, Start/Select) goes to
+     * the framework's focus navigation. Also claims the console-UI glyphs for the pad.
+     */
+    private fun sc2NavKey(keyCode: Int, down: Boolean) {
+        if (streamHandle != 0L) return // raced a stream start — the wire path owns input now
+        lastPadIsGamepad = true
+        lastPadStyle = Gamepad.PadStyle.XBOX // Valve pads carry A/B/X/Y in Xbox positions
+        val action = if (down) KeyEvent.ACTION_DOWN else KeyEvent.ACTION_UP
+        // The console UI navigates through padKeyProbe (GamepadNavEffect's held-state + repeat
+        // machinery — A/X/Y/D-pad/Select), NOT the focus system: synthesized events must be
+        // offered there first, exactly like real ones in dispatchKeyEvent (tester-diagnosed:
+        // routing everything via super.dispatchKeyEvent bypassed the probe, so only B — which
+        // never rides key events — did anything). The probes gate on keycode only, so a
+        // synthetic KeyEvent satisfies them.
+        padKeyProbe?.let { if (it(KeyEvent(action, keyCode))) return }
+        when (keyCode) {
+            // B → back, on release (same edge the real-pad path uses).
+            KeyEvent.KEYCODE_BUTTON_B -> if (!down) onBackPressedDispatcher.onBackPressed()
+            // A → activate the focused element (the focus system understands DPAD_CENTER; the
+            // Compose node focused via the moveFocus hook receives it once the ComposeView
+            // holds view-focus).
+            KeyEvent.KEYCODE_BUTTON_A ->
+                super.dispatchKeyEvent(KeyEvent(action, KeyEvent.KEYCODE_DPAD_CENTER))
+            // D-pad → Compose's own focus API (a synthetic DPAD KeyEvent can't grant initial
+            // focus — see [sc2MoveFocus]); one move per press edge.
+            KeyEvent.KEYCODE_DPAD_UP -> if (down) moveSc2Focus(androidx.compose.ui.focus.FocusDirection.Up)
+            KeyEvent.KEYCODE_DPAD_DOWN -> if (down) moveSc2Focus(androidx.compose.ui.focus.FocusDirection.Down)
+            KeyEvent.KEYCODE_DPAD_LEFT -> if (down) moveSc2Focus(androidx.compose.ui.focus.FocusDirection.Left)
+            KeyEvent.KEYCODE_DPAD_RIGHT -> if (down) moveSc2Focus(androidx.compose.ui.focus.FocusDirection.Right)
+            else -> super.dispatchKeyEvent(KeyEvent(action, keyCode))
+        }
+    }
+
+    private fun moveSc2Focus(dir: androidx.compose.ui.focus.FocusDirection) {
+        val hook = sc2MoveFocus
+        if (hook == null || !hook(dir)) {
+            // No composition hook (shouldn't happen) — fall back to the raw key dispatch.
+            super.dispatchKeyEvent(KeyEvent(KeyEvent.ACTION_DOWN, dirToKey(dir)))
+            super.dispatchKeyEvent(KeyEvent(KeyEvent.ACTION_UP, dirToKey(dir)))
+        }
+    }
+
+    private fun dirToKey(dir: androidx.compose.ui.focus.FocusDirection): Int = when (dir) {
+        androidx.compose.ui.focus.FocusDirection.Up -> KeyEvent.KEYCODE_DPAD_UP
+        androidx.compose.ui.focus.FocusDirection.Down -> KeyEvent.KEYCODE_DPAD_DOWN
+        androidx.compose.ui.focus.FocusDirection.Left -> KeyEvent.KEYCODE_DPAD_LEFT
+        else -> KeyEvent.KEYCODE_DPAD_RIGHT
+    }
+
    /** Resolve the panel's highest-refresh mode (same resolution) once, for [setConsoleHighRefreshRate]. */
    private fun resolveHighRefreshMode() {
        @Suppress("DEPRECATION")
@@ -129,9 +317,9 @@ class MainActivity : ComponentActivity() {
                if (bit != 0) {
                    // The router forwards the bit on this device's own wire pad index and tracks held
                    // state per pad. The emergency-exit chord (Select + Start + L1 + R1) is handled
-                    // inside the router: holding it for ~1.5 s fires router.onExitChord (wired in
-                    // StreamScreen), so a couch user with no keyboard/Back can still leave — but an
-                    // accidental brush of the four buttons no longer quits instantly.
+                    // inside the router: holding it briefly (~1 s, with an on-screen hint) fires
+                    // router.onExitChord (wired in StreamScreen), so a couch user with no keyboard/Back
+                    // can still leave — but an accidental brush of the four buttons no longer quits.
                    gamepadRouter?.onButton(event, bit)
                    return true // consumed
                }
@@ -153,7 +341,18 @@ class MainActivity : ComponentActivity() {
                    // physical-keyboard layout), keycode fallback — see Keymap docs.
                    val vk = Keymap.toVk(event)
                    if (vk != 0) {
+                        // Soft-keyboard events (the IME's virtual device — the stream's
+                        // KeyCaptureView path) carry Shift only as META state, where a real
+                        // keyboard sends discrete Shift transitions — so mirror the meta bit as
+                        // a VK_LSHIFT wrap or every IME capital/symbol lands unshifted on the
+                        // host. Never applied to hardware events: their Shift already went over
+                        // the wire, and a synthetic release here would un-hold a physical Shift
+                        // the user is still pressing.
+                        val imeShift = event.deviceId == KeyCharacterMap.VIRTUAL_KEYBOARD &&
+                            event.isShiftPressed && vk != 0xA0 && vk != 0xA1
+                        if (down && imeShift) NativeBridge.nativeSendKey(handle, 0xA0, true, 0)
                        NativeBridge.nativeSendKey(handle, vk, down, 0)
+                        if (!down && imeShift) NativeBridge.nativeSendKey(handle, 0xA0, false, 0)
                        return true // consumed — don't let the system also act on it
                    }
                }
@@ -1,6 +1,8 @@
 package io.unom.punktfunk

 import android.content.Context
+import android.os.Build
+import android.util.Log
 import android.view.Display

 /**
@@ -82,6 +84,23 @@ data class Settings(
     * otherwise misfire and wait out its timeout despite the host already being reachable.
     */
    val autoWakeEnabled: Boolean = true,
+    /**
+     * Opt-in: ALSO play the rumble the host addresses to controller 1 (wire pad 0) on this
+     * phone's own vibration motor — for clip-on gamepads that ship without rumble motors, where
+     * the phone body is the only actuator in the player's hands. Off by default; read once per
+     * session by StreamScreen (it hands GamepadFeedback the device vibrator only when set). The
+     * toggle is hidden on devices without a vibrator (TVs), where this would be a silent no-op.
+     */
+    val rumbleOnPhone: Boolean = false,
+
+    /**
+     * Capture a Steam Controller 2 (wired / Puck dongle over USB, or an already-paired BLE pad)
+     * and pass it through AS-IS: the host presents a real `28DE:1302` that its Steam drives
+     * directly (Linux hosts). ON by default — it engages only when such a controller is actually
+     * present at stream start, so it costs nothing otherwise; the toggle exists for the rare
+     * setup where the OS-level pad (lizard mode) is preferred.
+     */
+    val sc2Capture: Boolean = true,
 )

 /** [Settings.touchMode] values; persisted by name. */
@@ -142,6 +161,8 @@ class SettingsStore(context: Context) {
        libraryEnabled = prefs.getBoolean(K_LIBRARY, true),
        lowLatencyMode = prefs.getBoolean(K_LOW_LATENCY, true),
        autoWakeEnabled = prefs.getBoolean(K_AUTO_WAKE, true),
+        rumbleOnPhone = prefs.getBoolean(K_RUMBLE_ON_PHONE, false),
+        sc2Capture = prefs.getBoolean(K_SC2_CAPTURE, true),
    )

    fun save(s: Settings) {
@@ -162,6 +183,8 @@ class SettingsStore(context: Context) {
            .putBoolean(K_LIBRARY, s.libraryEnabled)
            .putBoolean(K_LOW_LATENCY, s.lowLatencyMode)
            .putBoolean(K_AUTO_WAKE, s.autoWakeEnabled)
+            .putBoolean(K_RUMBLE_ON_PHONE, s.rumbleOnPhone)
+            .putBoolean(K_SC2_CAPTURE, s.sc2Capture)
            .apply()
    }

@@ -197,6 +220,8 @@ class SettingsStore(context: Context) {
         */
        const val K_LOW_LATENCY = "low_latency_mode_v2"
        const val K_AUTO_WAKE = "auto_wake_enabled"
+        const val K_RUMBLE_ON_PHONE = "rumble_on_phone"
+        const val K_SC2_CAPTURE = "sc2_capture"

        /** Legacy Boolean the enum replaced — read once as the migration default, never written. */
        const val K_TRACKPAD = "trackpad_mode"
@@ -226,11 +251,25 @@ fun nativeDisplayMode(context: Context): Triple<Int, Int, Int> {
 */
 fun displaySupportsHdr(context: Context): Boolean {
    val display = runCatching { context.display }.getOrNull() ?: return false
-    @Suppress("DEPRECATION") // hdrCapabilities is the supported query on minSdk 31
-    val caps = display.hdrCapabilities ?: return false
-    return caps.supportedHdrTypes.any {
+    val types = buildSet {
+        // API 34+: the sanctioned per-mode query (Display.Mode.getSupportedHdrTypes). The
+        // deprecated Display-level hdrCapabilities can return EMPTY on Android 14+ devices
+        // (Pixel-class panels included), which would make a genuinely HDR display advertise
+        // no-HDR and pin the whole session to 8-bit SDR.
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.UPSIDE_DOWN_CAKE) {
+            display.mode.supportedHdrTypes.forEach { add(it) }
+        }
+        // Union the legacy query defensively — the supported one on minSdk 31, and some vendors
+        // populate only this on newer APIs.
+        @Suppress("DEPRECATION")
+        display.hdrCapabilities?.supportedHdrTypes?.forEach { add(it) }
+    }
+    // HDR10/HDR10+ only: the stream is BT.2020 PQ — a Dolby-Vision/HLG-only panel can't present it.
+    val supported = types.any {
        it == Display.HdrCapabilities.HDR_TYPE_HDR10 || it == Display.HdrCapabilities.HDR_TYPE_HDR10_PLUS
    }
+    Log.i("punktfunk", "display HDR types=$types → advertise HDR10=$supported")
+    return supported
 }

 /** Resolve [Settings] (with its 0=native placeholders) to the concrete mode to request. */
@@ -69,6 +69,7 @@ import androidx.compose.ui.text.input.KeyboardType
 import androidx.compose.ui.unit.dp
 import androidx.core.content.ContextCompat
 import io.unom.punktfunk.kit.VideoDecoders
+import io.unom.punktfunk.kit.deviceBodyVibrator

 /**
 * Stream settings, organised as an iOS-Settings / Android-system-settings style list of category
@@ -414,6 +415,26 @@ private fun ControlsSettings(s: Settings, update: (Settings) -> Unit, onOpenCont
            subtitle = "What the app detects, with a live input test",
            onClick = onOpenControllers,
        )
+        // Only where the device has a body vibrator to mirror onto (a TV box doesn't).
+        val context = LocalContext.current
+        val hasBodyVibrator = remember { deviceBodyVibrator(context) != null }
+        if (hasBodyVibrator) {
+            ToggleRow(
+                title = "Rumble on this phone",
+                subtitle = "Also play controller 1's rumble on this phone's own vibration " +
+                    "motor — for clip-on pads without rumble motors",
+                checked = s.rumbleOnPhone,
+                onCheckedChange = { on -> update(s.copy(rumbleOnPhone = on)) },
+            )
+            ToggleRow(
+                title = "Steam Controller 2 passthrough",
+                subtitle = "Capture a Steam Controller 2 (wired, Puck dongle, or paired " +
+                    "Bluetooth): it navigates these menus and streams as-is — Steam on the " +
+                    "host drives it like the physical pad (trackpads, gyro, haptics)",
+                checked = s.sc2Capture,
+                onCheckedChange = { on -> update(s.copy(sc2Capture = on)) },
+            )
+        }
    }
 }

@@ -39,6 +39,7 @@ internal fun StatsOverlay(
    s: DoubleArray,
    verbosity: StatsVerbosity,
    decoderLabel: String = "",
+    codecLabel: String = "",
    modifier: Modifier = Modifier,
 ) {
    if (verbosity == StatsVerbosity.OFF || s.size < 10) return
@@ -66,7 +67,7 @@ internal fun StatsOverlay(
            statLine(decoderLabel, Color(0xFFB0D0FF))
        }
        if (detailed) {
-            videoFeedLine(s)?.let { statLine(it, Color.White) }
+            videoFeedLine(s, codecLabel)?.let { statLine(it, Color.White) }
        }
        if (latValid) {
            // Display stage (s[22]–s[25], from OnFrameRendered): when a render timestamp landed
@@ -151,14 +152,15 @@ private fun counterLine(s: DoubleArray, lostTotal: Long): String? {
 }

 /**
- * Format the negotiated video-feed descriptor from the trailing four stats doubles
- * `[bitDepth, colorPrimaries, colorTransfer, chromaFormatIdc]`, e.g.
- * `HEVC · 10-bit · HDR (BT.2020 PQ) · 4:2:0`. Returns `null` on a pre-video-feed layout (< 14 doubles)
+ * Format the negotiated video-feed descriptor from [codecLabel] plus the trailing four stats
+ * doubles `[bitDepth, colorPrimaries, colorTransfer, chromaFormatIdc]`, e.g.
+ * `AV1 · 10-bit · HDR (BT.2020 PQ) · 4:2:0`. Returns `null` on a pre-video-feed layout (< 14 doubles)
 * so the overlay simply omits the line. The codes are CICP / H.273: transfer 16 = PQ, 18 = HLG (else
- * SDR); primaries 9 = BT.2020, 1 = BT.709; chroma_format_idc 1 = 4:2:0, 2 = 4:2:2, 3 = 4:4:4. The
- * Android decoder is always HEVC (`video/hevc`).
+ * SDR); primaries 9 = BT.2020, 1 = BT.709; chroma_format_idc 1 = 4:2:0, 2 = 4:2:2, 3 = 4:4:4.
+ * [codecLabel] is the host-resolved codec (`nativeVideoCodecLabel`); a blank one falls back to
+ * `HEVC` (the pre-negotiation default) for the brief window before it's resolved.
 */
-private fun videoFeedLine(s: DoubleArray): String? {
+private fun videoFeedLine(s: DoubleArray, codecLabel: String): String? {
    if (s.size < 14) return null
    val bitDepth = s[10].toInt()
    val primaries = s[11].toInt()
@@ -175,5 +177,6 @@ private fun videoFeedLine(s: DoubleArray): String? {
        2 -> "4:2:2"
        else -> "4:2:0"
    }
-    return "HEVC · $depthLabel · $dynamicRange ($colorSpace) · $chromaLabel"
+    val codec = codecLabel.ifEmpty { "HEVC" }
+    return "$codec · $depthLabel · $dynamicRange ($colorSpace) · $chromaLabel"
 }
@@ -1,20 +1,35 @@
 package io.unom.punktfunk

 import android.Manifest
+import android.app.PendingIntent
+import android.content.BroadcastReceiver
 import android.content.Context
+import android.content.Intent
+import android.content.IntentFilter
 import android.content.pm.ActivityInfo
 import android.content.pm.PackageManager
+import android.hardware.usb.UsbManager
 import android.net.wifi.WifiManager
 import android.os.Build
+import android.text.InputType
 import android.util.Log
 import android.view.SurfaceHolder
 import android.view.SurfaceView
+import android.view.View
 import android.view.WindowManager
+import android.view.inputmethod.BaseInputConnection
+import android.view.inputmethod.EditorInfo
+import android.view.inputmethod.InputConnection
+import android.view.inputmethod.InputMethodManager
 import android.widget.Toast
 import androidx.activity.compose.BackHandler
+import androidx.compose.foundation.background
 import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.size
+import androidx.compose.foundation.shape.RoundedCornerShape
+import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.DisposableEffect
 import androidx.compose.runtime.LaunchedEffect
@@ -24,9 +39,11 @@ import androidx.compose.runtime.remember
 import androidx.compose.runtime.setValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.input.pointer.pointerInput
 import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.unit.dp
+import androidx.compose.ui.unit.sp
 import androidx.compose.ui.viewinterop.AndroidView
 import androidx.core.content.ContextCompat
 import androidx.core.view.WindowCompat
@@ -34,7 +51,9 @@ import androidx.core.view.WindowInsetsCompat
 import androidx.core.view.WindowInsetsControllerCompat
 import io.unom.punktfunk.kit.GamepadFeedback
 import io.unom.punktfunk.kit.GamepadRouter
+import io.unom.punktfunk.kit.deviceBodyVibrator
 import io.unom.punktfunk.kit.NativeBridge
+import io.unom.punktfunk.kit.Sc2Capture
 import io.unom.punktfunk.kit.VideoDecoders
 import java.util.concurrent.atomic.AtomicBoolean
 import kotlinx.coroutines.delay
@@ -65,6 +84,7 @@ fun StreamScreen(handle: Long, micEnabled: Boolean, onDisconnect: () -> Unit) {
    val initialSettings = remember { SettingsStore(context).load() }
    var stats by remember { mutableStateOf<DoubleArray?>(null) }
    var decoderLabel by remember { mutableStateOf("") }
+    var codecLabel by remember { mutableStateOf("") }
    var statsVerbosity by remember { mutableStateOf(initialSettings.statsVerbosity) }
    val statsOn = statsVerbosity != StatsVerbosity.OFF
    // Touch model is fixed per session (re-keys the gesture handler below if it ever changes).
@@ -80,6 +100,9 @@ fun StreamScreen(handle: Long, micEnabled: Boolean, onDisconnect: () -> Unit) {
    LaunchedEffect(handle, statsOn) {
        NativeBridge.nativeSetVideoStatsEnabled(handle, statsOn)
        if (statsOn) {
+            // Codec is resolved at the handshake (Welcome) — fixed for the session, so read its
+            // label once up front (before the first snapshot renders the video-feed line).
+            if (codecLabel.isEmpty()) codecLabel = NativeBridge.nativeVideoCodecLabel(handle)
            while (true) {
                delay(1000)
                stats = NativeBridge.nativeVideoStats(handle)
@@ -149,6 +172,10 @@ fun StreamScreen(handle: Long, micEnabled: Boolean, onDisconnect: () -> Unit) {
        }.onEach { it.setReferenceCounted(false) }
    }

+    // True while the gamepad exit chord (Select+Start+L1+R1) is held and counting down — drives the
+    // "hold to quit" hint overlay. Set from the router's onExitArmed (main thread).
+    var exitArming by remember { mutableStateOf(false) }
+
    DisposableEffect(handle) {
        window?.addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON)
        wifiLocks.forEach { lock ->
@@ -166,6 +193,12 @@ fun StreamScreen(handle: Long, micEnabled: Boolean, onDisconnect: () -> Unit) {
            it.systemBarsBehavior = WindowInsetsControllerCompat.BEHAVIOR_SHOW_TRANSIENT_BARS_BY_SWIPE
            it.hide(WindowInsetsCompat.Type.systemBars())
        }
+        // The soft keyboard (three-finger swipe up → KeyCaptureView below) must OVERLAY the
+        // stream, never pan/resize it — the video is a fixed-mode surface, not a document.
+        // Scoped to the stream; the app's other screens keep the default for their text fields.
+        val priorSoftInput = window?.attributes?.softInputMode
+            ?: WindowManager.LayoutParams.SOFT_INPUT_ADJUST_UNSPECIFIED
+        window?.setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_ADJUST_NOTHING)
        // Lock to landscape while streaming — the host streams a landscape desktop, so pin the device
        // there (either landscape direction is fine) and stop it rotating to portrait mid-session. The
        // activity declares configChanges=orientation, so this re-lays out the surface in place without
@@ -185,22 +218,88 @@ fun StreamScreen(handle: Long, micEnabled: Boolean, onDisconnect: () -> Unit) {
        // the same way the Back gesture does.
        activity?.requestStreamExit = { NativeBridge.nativeDisconnectQuit(handle); onDisconnect() }
        router.onExitChord = { activity?.requestStreamExit?.invoke() }
+        // Show a "hold to quit" hint the moment the chord completes (the router debounces the actual
+        // exit); it clears when the buttons release early or the hold elapses. Runs on the main thread.
+        router.onExitArmed = { armed -> exitArming = armed }
        activity?.setConsoleHighRefreshRate(false) // let the decoder's setFrameRate pick the panel rate
        // Host→client feedback (rumble + DualSense lightbar/LEDs), routed to each controller by pad
        // index via the router; poll threads stopped + joined before the router is released and the
-        // session closed.
-        val feedback = GamepadFeedback(handle, router).also { it.start() }
+        // session closed. "Rumble on this phone" (opt-in) additionally mirrors controller 1's
+        // rumble onto the device's own vibrator — for clip-on pads without rumble motors.
+        val feedback = GamepadFeedback(
+            handle,
+            router,
+            deviceVibrator = if (initialSettings.rumbleOnPhone) deviceBodyVibrator(context) else null,
+        ).also { it.start() }
        // Free a disconnected controller's rumble/lights bindings promptly (else the open lights
        // session leaks until the session ends). The router owns hot-plug; the feedback owns the binds.
        router.onSlotClosed = feedback::onDeviceRemoved
+        // Steam Controller 2 as-is passthrough (opt-out): capture a wired/Puck USB pad — or an
+        // already-paired BLE one — and forward its raw reports; the host mirrors a real
+        // 28DE:1302 that its Steam drives directly, and Steam's rumble/settings writes come back
+        // through feedback.onHidRaw onto the physical controller. Engages only when such a pad is
+        // actually present; the wire slot is claimed lazily on its first state report.
+        // The menu-time capture (UI navigation) must let go before the stream-mode capture can
+        // claim the interfaces; it resumes in onDispose once the stream releases them.
+        activity?.stopSc2MenuNav()
+        val sc2 = if (initialSettings.sc2Capture) Sc2Capture(context, router) else null
+        var sc2UsbReceiver: BroadcastReceiver? = null
+        if (sc2 != null) {
+            feedback.onHidRaw = sc2::onHidRaw
+            val usbManager = context.getSystemService(Context.USB_SERVICE) as UsbManager
+            val usbDev = sc2.findUsbDevice()
+            when {
+                usbDev != null && usbManager.hasPermission(usbDev) -> sc2.startUsb(usbDev)
+                usbDev != null -> {
+                    // One-time system dialog; capture engages on grant (Android remembers the
+                    // grant for as long as the device stays attached).
+                    val action = "io.unom.punktfunk.SC2_USB_PERMISSION"
+                    val receiver = object : BroadcastReceiver() {
+                        override fun onReceive(c: Context?, intent: Intent?) {
+                            if (intent?.action != action) return
+                            val ok = intent.getBooleanExtra(UsbManager.EXTRA_PERMISSION_GRANTED, false)
+                            if (ok) sc2.startUsb(usbDev) else Log.i("punktfunk", "SC2 USB permission denied")
+                        }
+                    }
+                    sc2UsbReceiver = receiver
+                    ContextCompat.registerReceiver(
+                        context, receiver, IntentFilter(action), ContextCompat.RECEIVER_NOT_EXPORTED,
+                    )
+                    usbManager.requestPermission(
+                        usbDev,
+                        PendingIntent.getBroadcast(
+                            context, 0,
+                            Intent(action).setPackage(context.packageName),
+                            // MUTABLE: the USB stack appends the grant extras to this intent.
+                            PendingIntent.FLAG_MUTABLE,
+                        ),
+                    )
+                }
+                ContextCompat.checkSelfPermission(context, Manifest.permission.BLUETOOTH_CONNECT) ==
+                    PackageManager.PERMISSION_GRANTED -> {
+                    sc2.pairedBleAddress()?.let { addr ->
+                        Log.i("punktfunk", "SC2: no USB pad — using the paired BLE controller $addr")
+                        sc2.startBle(addr)
+                    }
+                }
+            }
+        }
        onDispose {
            closed.set(true) // from here the handle gets freed; surfaceDestroyed must not touch it
+            feedback.onHidRaw = null
            feedback.stop() // stop + join the poll threads BEFORE the router is released / handle freed
+            sc2UsbReceiver?.let { runCatching { context.unregisterReceiver(it) } }
+            sc2?.stop() // release the USB/BLE link + free the wire slot (host tears the pad down)
+            router.onExitArmed = null // don't poke Compose state from release()'s disarm while tearing down
            router.release() // flush every slot (nothing sticks host-side) + drop the hot-plug listener
            activity?.gamepadRouter = null
            activity?.streamHandle = 0L
            activity?.requestStreamExit = null
+            // Back in the menus: the SC2 (if present) resumes driving the console UI.
+            activity?.startSc2MenuNav()
            activity?.setConsoleHighRefreshRate(true) // back to the console UI's max refresh
+            controller?.hide(WindowInsetsCompat.Type.ime()) // drop any keyboard left showing
+            window?.setSoftInputMode(priorSoftInput)
            controller?.show(WindowInsetsCompat.Type.systemBars())
            window?.clearFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON)
            if (lowLatencyMode && Build.VERSION.SDK_INT >= Build.VERSION_CODES.R) {
@@ -221,6 +320,9 @@ fun StreamScreen(handle: Long, micEnabled: Boolean, onDisconnect: () -> Unit) {
    // Back gesture = a deliberate exit → signal the quit so the host tears down now (no linger).
    BackHandler { NativeBridge.nativeDisconnectQuit(handle); onDisconnect() }

+    // Focus anchor the three-finger keyboard swipe summons the IME onto (see KeyCaptureView).
+    var keyCapture by remember { mutableStateOf<KeyCaptureView?>(null) }
+
    Box(modifier = Modifier.fillMaxSize()) {
        AndroidView(
            modifier = Modifier.fillMaxSize(),
@@ -268,11 +370,25 @@ fun StreamScreen(handle: Long, micEnabled: Boolean, onDisconnect: () -> Unit) {
        // BEFORE the transparent gesture layer below, so it shows through and never eats touches.
        if (statsOn) {
            stats?.let {
-                StatsOverlay(it, statsVerbosity, decoderLabel, Modifier.align(Alignment.TopStart).padding(12.dp))
+                StatsOverlay(it, statsVerbosity, decoderLabel, codecLabel, Modifier.align(Alignment.TopStart).padding(12.dp))
            }
        }
+        // "Hold to quit" hint while the gamepad exit chord is armed — the exit debounces on a ~1 s
+        // hold, so without this cue a couch user reads the (deliberately no-longer-instant) chord as
+        // broken. Purely visual; it sits above the video and below the gesture layer.
+        if (exitArming) {
+            ExitChordHint(Modifier.align(Alignment.TopCenter).padding(top = 16.dp))
+        }
+        // Invisible 1-px focus anchor for the host-typing soft keyboard (three-finger swipe
+        // up in the mouse modes) — it never draws or takes touches, it just owns IME focus.
+        AndroidView(
+            modifier = Modifier.size(1.dp),
+            factory = { ctx -> KeyCaptureView(ctx).also { keyCapture = it } },
+        )
        // Touch input per the Settings model: trackpad/direct-pointer mouse (the shared gesture
-        // vocabulary) or real multi-touch passthrough — see TouchInput.kt.
+        // vocabulary) or real multi-touch passthrough — see TouchInput.kt. Passthrough gets no
+        // keyboard gesture: its fingers belong to the host verbatim (a swipe there may BE a
+        // host-OS gesture), so intercepting three fingers would corrupt real multi-touch.
        Box(
            Modifier.fillMaxSize().pointerInput(handle, touchMode) {
                when (touchMode) {
@@ -281,9 +397,63 @@ fun StreamScreen(handle: Long, micEnabled: Boolean, onDisconnect: () -> Unit) {
                        handle,
                        trackpad = touchMode == TouchMode.TRACKPAD,
                        onCycleStats = { statsVerbosity = statsVerbosity.next() },
+                        onKeyboard = { show -> keyCapture?.setImeVisible(show) },
                    )
                }
            },
        )
    }
 }
+
+/**
+ * The "hold to quit" cue shown while the gamepad exit chord (Select + Start + L1 + R1) is held. The
+ * chord no longer quits on a quick press — the router debounces it on a ~1 s hold — so this confirms
+ * the press registered and tells the user to keep holding. Purely visual; [GamepadRouter.onExitArmed]
+ * toggles its visibility.
+ */
+@Composable
+private fun ExitChordHint(modifier: Modifier = Modifier) {
+    Text(
+        "Hold to quit…",
+        modifier = modifier
+            .background(Color.Black.copy(alpha = 0.55f), RoundedCornerShape(8.dp))
+            .padding(horizontal = 14.dp, vertical = 8.dp),
+        color = Color.White,
+        fontSize = 15.sp,
+    )
+}
+
+/**
+ * Invisible focus anchor for typing on the host: the three-finger swipe summons the device IME
+ * onto this view. `TYPE_NULL` puts the IME in "dumb keyboard" mode — it delivers raw [KeyEvent]s
+ * (no composing text, no autocorrect), which flow through `MainActivity.dispatchKeyEvent` →
+ * `Keymap.toVk` → the host, the exact path a hardware keyboard takes. Text an IME insists on
+ * committing instead still arrives: the non-editable [BaseInputConnection] synthesizes KeyEvents
+ * for it via `KeyCharacterMap` (with Shift carried as meta state — see the IME-shift wrap in
+ * `MainActivity.dispatchKeyEvent`).
+ */
+private class KeyCaptureView(context: Context) : View(context) {
+    init {
+        isFocusable = true
+        isFocusableInTouchMode = true
+    }
+
+    override fun onCheckIsTextEditor(): Boolean = true
+
+    override fun onCreateInputConnection(outAttrs: EditorInfo): InputConnection {
+        outAttrs.inputType = InputType.TYPE_NULL
+        outAttrs.imeOptions = EditorInfo.IME_FLAG_NO_EXTRACT_UI or EditorInfo.IME_FLAG_NO_FULLSCREEN
+        return BaseInputConnection(this, false)
+    }
+
+    fun setImeVisible(show: Boolean) {
+        val imm = context.getSystemService(Context.INPUT_METHOD_SERVICE) as? InputMethodManager
+            ?: return
+        if (show) {
+            requestFocus()
+            imm.showSoftInput(this, 0)
+        } else {
+            imm.hideSoftInputFromWindow(windowToken, 0)
+        }
+    }
+}
@@ -19,6 +19,10 @@ private const val TAP_SLOP = 12f
 private const val TAP_DRAG_MS = 250L
 private const val SCROLL_DIV = 4f

+// Three-finger vertical swipe: the fraction of the view height the centroid must travel to
+// summon (up) / dismiss (down) the local soft keyboard.
+private const val KB_SWIPE_FRACTION = 0.10f
+
 // Trackpad-mode pointer ballistics (relative one-finger motion). POINTER_SENS: base finger-px →
 // host-px gain (~1:1, never twitchy). The rest is mild acceleration so a flick crosses the screen
 // while a slow drag stays precise: above ACCEL_SPEED_FLOOR px/ms the gain ramps by ACCEL_GAIN per
@@ -40,7 +44,9 @@ private const val ACCEL_MAX = 3.0f
 *
 * Both share the same gesture vocabulary: tap = left click; two-finger tap = right click;
 * two-finger drag = scroll; tap-then-press-and-drag = left-drag (text selection / moving
- * windows); three-finger tap = [onCycleStats] (cycle the stats-HUD verbosity tier).
+ * windows); three-finger tap = [onCycleStats] (cycle the stats-HUD verbosity tier);
+ * three-finger swipe up/down = [onKeyboard] (summon/dismiss the local soft keyboard, for
+ * typing on the host).
 */
 /**
 * Real multi-touch passthrough ([TouchMode.TOUCH]): every finger forwards as a host touchscreen
@@ -94,6 +100,7 @@ internal suspend fun PointerInputScope.streamTouchInput(
    handle: Long,
    trackpad: Boolean,
    onCycleStats: () -> Unit,
+    onKeyboard: (show: Boolean) -> Unit,
 ) {
    var lastTapUp = 0L
    var lastTapX = 0f
@@ -128,6 +135,12 @@ internal suspend fun PointerInputScope.streamTouchInput(
        var maxFingers = 1
        var scrolling = false
        var scrollCount = 0 // pointer count the scroll centroid is anchored at
+        // Keyboard-swipe state: the 3+-finger centroid anchor (per finger count, like the
+        // scroll anchor) and a once-per-gesture latch.
+        var kbCount = 0
+        var kbAnchorX = 0f
+        var kbAnchorY = 0f
+        var kbFired = false
        var prevCx = startX
        var prevCy = startY
        var upTime = down.uptimeMillis
@@ -148,9 +161,12 @@ internal suspend fun PointerInputScope.streamTouchInput(
                break
            }
            if (pressed.size > maxFingers) maxFingers = pressed.size
+            // Dropping below three fingers forgets the keyboard-swipe anchor, so a 3→2→3
+            // bounce re-anchors instead of reading the count change as swipe travel.
+            if (pressed.size < 3) kbCount = 0

-            if (pressed.size >= 2) {
-                // Two+ fingers → scroll by the centroid delta; never move the cursor.
+            if (pressed.size == 2) {
+                // Two fingers → scroll by the centroid delta; never move the cursor.
                val cx = (pressed.sumOf { it.position.x.toDouble() } / pressed.size).toFloat()
                val cy = (pressed.sumOf { it.position.y.toDouble() } / pressed.size).toFloat()
                // (Re-)anchor whenever the finger COUNT changes, not just on scroll start: the
@@ -177,6 +193,36 @@ internal suspend fun PointerInputScope.streamTouchInput(
                    prevCx = cx
                    moved = true
                }
+            } else if (pressed.size >= 3) {
+                // Three+ fingers → the keyboard swipe, never scroll (the documented
+                // vocabulary is TWO-finger scroll; 3+ only fell into the scroll path as an
+                // accident of its old `>= 2` bound). Anchor the centroid per finger count
+                // (same reasoning as the scroll anchor above) and fire once per gesture when
+                // the vertical travel crosses the threshold: up = show, down = hide.
+                val cx = (pressed.sumOf { it.position.x.toDouble() } / pressed.size).toFloat()
+                val cy = (pressed.sumOf { it.position.y.toDouble() } / pressed.size).toFloat()
+                if (pressed.size != kbCount) {
+                    kbCount = pressed.size
+                    kbAnchorX = cx
+                    kbAnchorY = cy
+                } else {
+                    val dy = cy - kbAnchorY
+                    // Real centroid travel disqualifies the tap classification below (else a
+                    // sub-threshold swipe would still fire the three-finger stats tap).
+                    if (abs(dy) > TAP_SLOP || abs(cx - kbAnchorX) > TAP_SLOP) moved = true
+                    if (!kbFired && abs(dy) >= size.height * KB_SWIPE_FRACTION) {
+                        kbFired = true
+                        onKeyboard(dy < 0) // finger up → show, finger down → hide
+                    }
+                }
+                // Leaving the scroll state stale would read the 3→2 centroid jump as a wheel
+                // notch; clearing it makes a return to two fingers re-anchor fresh. Same for
+                // the trackpad's tracked finger: its prev position froze while 3+ fingers were
+                // down, so dropping straight back to one finger must re-anchor (zero delta),
+                // not replay the whole 3-finger phase as one cursor jump.
+                scrolling = false
+                scrollCount = 0
+                trackId = PointerId(Long.MIN_VALUE)
            } else if (!scrolling) {
                // One finger (skipped once a gesture turned into a scroll, so dropping
                // back to one finger doesn't jerk the cursor).
@@ -214,6 +214,7 @@ internal fun StreamScene(verbosity: StatsVerbosity = StatsVerbosity.DETAILED) {
            ),
            verbosity = verbosity,
            decoderLabel = "c2.qti.hevc.decoder · low-latency",
+            codecLabel = "HEVC",
            modifier = Modifier.align(Alignment.TopStart).padding(12.dp),
        )
    }
@@ -36,6 +36,16 @@ object Gamepad {
    const val BTN_X = 0x4000
    const val BTN_Y = 0x8000

+    // Extended bits (Moonlight `buttonFlags2 << 16` namespace — `input.rs::gamepad`): the four
+    // back grips (Steam L4/L5/R4/R5 ≙ Elite P1–P4), touchpad click, and the misc/QAM button.
+    // Android's standard InputDevice path never produces these; the SC2 capture link does.
+    const val BTN_PADDLE1 = 0x10000
+    const val BTN_PADDLE2 = 0x20000
+    const val BTN_PADDLE3 = 0x40000
+    const val BTN_PADDLE4 = 0x80000
+    const val BTN_TOUCHPAD = 0x100000
+    const val BTN_MISC1 = 0x200000
+
    // Axis ids — must equal `input.rs::gamepad::AXIS_*`.
    const val AXIS_LS_X = 0
    const val AXIS_LS_Y = 1
@@ -54,6 +64,8 @@ object Gamepad {
    const val PREF_STEAMDECK = 6
    const val PREF_DUALSENSEEDGE = 7
    const val PREF_SWITCHPRO = 8
+    const val PREF_STEAMCONTROLLER2 = 9
+    const val PREF_STEAMCONTROLLER2_PUCK = 10

    // USB vendor ids of the controllers we can identify by VID/PID.
    private const val VID_SONY = 0x054C
@@ -81,6 +93,12 @@ object Gamepad {
    private val PID_STEAMDECK = setOf(0x1205)
    private val PID_STEAMCONTROLLER = setOf(0x1102, 0x1142)

+    // Steam Controller 2: wired (0x1302), BLE (0x1303), and Puck dongles (0x1304/0x1305).
+    // Sc2Capture normally claims these directly; the plain InputDevice path is only a degraded
+    // fallback. Keep Puck distinct so even that path requests the native multi-interface identity.
+    private val PID_STEAMCONTROLLER2 = setOf(0x1302, 0x1303)
+    private val PID_STEAMCONTROLLER2_PUCK = setOf(0x1304, 0x1305)
+
    // Microsoft Xbox One / Series product ids (wired + the common Bluetooth/dongle revisions). All
    // behave like Xbox 360 on the host minus the glyph identity, so they share one pref byte.
    private val PID_XBOXONE = setOf(
@@ -107,6 +125,9 @@ object Gamepad {
            vid == VID_MICROSOFT && pid in PID_XBOXONE -> PREF_XBOXONE
            vid == VID_VALVE && pid in PID_STEAMDECK -> PREF_STEAMDECK
            vid == VID_VALVE && pid in PID_STEAMCONTROLLER -> PREF_STEAMCONTROLLER
+            vid == VID_VALVE && pid in PID_STEAMCONTROLLER2_PUCK ->
+                PREF_STEAMCONTROLLER2_PUCK
+            vid == VID_VALVE && pid in PID_STEAMCONTROLLER2 -> PREF_STEAMCONTROLLER2
            vid == VID_NINTENDO && pid in PID_SWITCHPRO -> PREF_SWITCHPRO
            else -> PREF_XBOX360
        }
@@ -1,5 +1,6 @@
 package io.unom.punktfunk.kit

+import android.content.Context
 import android.graphics.Color
 import android.hardware.lights.Light
 import android.hardware.lights.LightState
@@ -33,13 +34,24 @@ import java.nio.ByteBuffer
 *
 * With no controller connected (emulator) rumble/lights become logged no-ops — exactly the
 * verification path; the `Log.i` receipt lines fire regardless of rendering hardware.
+ *
+ * [deviceVibrator] is the opt-in phone mirror ("Rumble on this phone", off by default): when
+ * non-null, rumble the host addresses to wire pad 0 (controller 1) is ALSO played on this
+ * device's own vibration motor — for clip-on gamepads that ship without rumble motors, where the
+ * phone body is the only actuator in the player's hands. StreamScreen passes it only when the
+ * setting is on (see [deviceBodyVibrator]).
 */
-class GamepadFeedback(private val handle: Long, private val router: GamepadRouter?) {
+class GamepadFeedback(
+    private val handle: Long,
+    private val router: GamepadRouter?,
+    private val deviceVibrator: Vibrator? = null,
+) {
    private companion object {
        const val TAG = "pf.feedback"
        const val TAG_LED: Byte = 0x01
        const val TAG_PLAYER_LEDS: Byte = 0x02
        const val TAG_TRIGGER: Byte = 0x03
+        const val TAG_HID_RAW: Byte = 0x05
        // Fallback one-shot duration against a legacy host (no v2 TTL lease): the prior fixed value.
        // A new host renews far below this, so it never actually holds this long there.
        const val LEGACY_RUMBLE_MS = 60_000L
@@ -101,7 +113,8 @@ class GamepadFeedback(private val handle: Long, private val router: GamepadRoute
        }, "pf-rumble").apply { isDaemon = true; start() }

        hidoutThread = Thread({
-            val buf = ByteBuffer.allocateDirect(64)
+            // 128: the raw as-is passthrough events are [pad][kind tag][report kind][≤64 bytes].
+            val buf = ByteBuffer.allocateDirect(128)
            while (running) {
                val n = NativeBridge.nativeNextHidout(handle, buf)
                if (n < 0) continue // timeout / closed
@@ -127,7 +140,9 @@ class GamepadFeedback(private val handle: Long, private val router: GamepadRoute
        runCatching { hidoutThread?.join() }
        rumbleThread = null
        hidoutThread = null
-        // Threads are dead — drop any held rumble and close every lights session.
+        // Threads are dead — drop any held rumble (incl. the phone mirror's) and close every
+        // lights session.
+        runCatching { deviceVibrator?.cancel() }
        synchronized(bindsLock) {
            for (b in rumbleBinds.values) b?.let {
                runCatching { it.vm?.cancel() }
@@ -203,6 +218,11 @@ class GamepadFeedback(private val handle: Long, private val router: GamepadRoute
     */
    private fun renderRumble(pad: Int, low: Int, high: Int, durationMs: Long) {
        Log.i(TAG, "rumble pad=$pad low=$low high=$high ttlMs=$durationMs") // verification line — BEFORE any no-op return
+        // Opt-in phone mirror, BEFORE the controller-bind early-return: the exact pads this
+        // serves have no vibrator of their own, so their bind below is null. It follows
+        // controller 1 unconditionally rather than only motor-less pads — capability probing
+        // already decided the bind, and the user opted in.
+        if (pad == 0) renderDeviceRumble(low, high, durationMs)
        val bind = rumbleBindFor(pad) ?: return
        val lo = toAmplitude(low)
        val hi = toAmplitude(high)
@@ -246,6 +266,29 @@ class GamepadFeedback(private val handle: Long, private val router: GamepadRoute
        }
    }

+    /**
+     * The opt-in phone mirror: play a wire-pad-0 rumble on this device's own vibration motor —
+     * one physical actuator, so both wire motors blend into one effect (the same blend as the
+     * single-motor controller path). Same envelope semantics too: a one-shot held for the host's
+     * TTL, cancel on (0,0).
+     */
+    private fun renderDeviceRumble(low: Int, high: Int, durationMs: Long) {
+        val v = deviceVibrator ?: return
+        val lo = toAmplitude(low)
+        val hi = toAmplitude(high)
+        if (lo == 0 && hi == 0) {
+            runCatching { v.cancel() } // (0,0) = stop
+            return
+        }
+        val a = (lo * 0.8 + hi * 0.33).toInt().coerceIn(1, 255)
+        runCatching {
+            v.vibrate(
+                if (v.hasAmplitudeControl()) oneShot(a, durationMs)
+                else oneShot(VibrationEffect.DEFAULT_AMPLITUDE, durationMs)
+            )
+        }
+    }
+
    // 0..0xFFFF → 1..255 (high byte); a nonzero motor never collapses to 0.
    private fun toAmplitude(v16: Int): Int {
        val a = (v16 ushr 8) and 0xFF
@@ -290,10 +333,32 @@ class GamepadFeedback(private val handle: Long, private val router: GamepadRoute
                    "hidout pad=$pad Trigger which=$which effLen=$effLen mode=0x%02x (adaptive triggers unsupported on Android)".format(mode),
                )
            }
+            TAG_HID_RAW -> {
+                // As-is SC2 passthrough: a raw report the host's Steam wrote to the virtual pad —
+                // [kind: 0=output, 1=feature][report bytes, id first]. Handed to the capture link
+                // for verbatim replay on the physical controller; dropped when no link owns the pad.
+                val kind = buf.get().toInt() and 0xFF
+                val len = n - 3
+                if (len > 0) {
+                    val data = ByteArray(len)
+                    buf.get(data)
+                    onHidRaw?.invoke(pad, kind, data)
+                }
+            }
            else -> Log.d(TAG, "hidout: unknown kind, dropped")
        }
    }

+    /**
+     * Raw HID-report replay hook for the as-is Steam Controller 2 passthrough: invoked (on the
+     * hidout poll thread) with the wire pad index, the report kind (0 = output report, 1 =
+     * feature report), and the full report bytes (id first) the host's hidraw consumer wrote.
+     * `StreamScreen` wires this to the SC2 capture so Steam's rumble/settings land on the
+     * physical controller.
+     */
+    @Volatile
+    var onHidRaw: ((pad: Int, kind: Int, data: ByteArray) -> Unit)? = null
+
    /** hid-playstation 5-LED pattern → player index 1..4 (0 = off); falls back to a bit count. */
    private fun playerIndexForBits(bits: Int): Int = when (bits and 0x1F) {
        0b00000 -> 0
@@ -349,3 +414,18 @@ class GamepadFeedback(private val handle: Long, private val router: GamepadRoute
        }
    }
 }
+
+/**
+ * This device's own body vibrator (the phone, not a controller), or null where there is none
+ * (TVs) — gates the "Rumble on this phone" setting's visibility and feeds
+ * [GamepadFeedback.deviceVibrator] when it's on.
+ */
+fun deviceBodyVibrator(context: Context): Vibrator? {
+    val v = if (Build.VERSION.SDK_INT >= 31) {
+        context.getSystemService(VibratorManager::class.java)?.defaultVibrator
+    } else {
+        @Suppress("DEPRECATION")
+        context.getSystemService(Context.VIBRATOR_SERVICE) as? Vibrator
+    }
+    return v?.takeIf { it.hasVibrator() }
+}
@@ -57,6 +57,14 @@ class GamepadRouter(context: Context, private val handle: Long, private val sett
     */
    var onExitChord: (() -> Unit)? = null

+    /**
+     * Invoked (main thread) with `true` the moment the exit chord completes and the hold countdown
+     * starts, and `false` when it's cancelled (a button lifted early) or the timer elapses. `StreamScreen`
+     * wires this to a "hold to quit" hint so the hold is discoverable — the chord no longer quits on a
+     * quick press, and without an on-screen cue that reads as the shortcut being broken.
+     */
+    var onExitArmed: ((armed: Boolean) -> Unit)? = null
+
    private val mainHandler = Handler(Looper.getMainLooper())
    /** The pending exit-chord hold timer, or null when the chord isn't currently armed. */
    private var pendingExit: Runnable? = null
@@ -84,28 +92,37 @@ class GamepadRouter(context: Context, private val handle: Long, private val sett
     * One gamepad button transition for the device that produced [event] (already resolved to BTN_*
     * bit [bit]). Opens the device's slot (declaring its type) if unseen, forwards the bit on the
     * slot's pad index, and tracks held state. Completing the emergency stream-exit chord (Select +
-     * Start + L1 + R1) on any one pad ARMS a [EXIT_HOLD_MS] hold timer rather than leaving instantly;
-     * [onExitChord] fires only if the chord is still held at expiry (a brief accidental brush is
-     * ignored), matching `DISCONNECT_HOLD` on the SDL/Apple clients. Any controller can leave.
+     * Start + L1 + R1) on any one pad ARMS a [EXIT_HOLD_MS] hold timer rather than leaving instantly
+     * ([onExitArmed] fires so the UI can show a "hold to quit" hint); [onExitChord] fires only if the
+     * chord is still held at expiry (a brief accidental brush is ignored), matching `DISCONNECT_HOLD`
+     * on the SDL/Apple clients. Any controller can leave.
     */
    fun onButton(event: KeyEvent, bit: Int) {
        val slot = slotFor(event.device) ?: return
        when (event.action) {
-            KeyEvent.ACTION_DOWN -> {
-                // repeatCount guard: don't re-send a held button as auto-repeat.
-                if (event.repeatCount == 0) NativeBridge.nativeSendGamepadButton(handle, bit, true, slot.index)
-                slot.held = slot.held or bit
-                // Full chord now held on this pad → start the hold countdown (idempotent while held).
-                if (slot.held and EXIT_CHORD == EXIT_CHORD) armExit()
-            }
-            KeyEvent.ACTION_UP -> {
-                NativeBridge.nativeSendGamepadButton(handle, bit, false, slot.index)
-                slot.held = slot.held and bit.inv()
-                // A chord button lifted before the hold elapsed → cancel, unless another pad still
-                // holds the full chord.
-                if (bit and EXIT_CHORD != 0 && slots.values.none { it.held and EXIT_CHORD == EXIT_CHORD }) {
-                    disarmExit()
-                }
+            // repeatCount guard: don't re-send a held button as auto-repeat.
+            KeyEvent.ACTION_DOWN -> slotButton(slot, bit, down = true, send = event.repeatCount == 0)
+            KeyEvent.ACTION_UP -> slotButton(slot, bit, down = false, send = true)
+        }
+    }
+
+    /**
+     * One button transition on [slot] — the shared body behind [onButton] and an [ExternalPad]'s
+     * transitions: forward the wire event, track held state, and arm/disarm the exit chord.
+     */
+    private fun slotButton(slot: Slot, bit: Int, down: Boolean, send: Boolean) {
+        if (down) {
+            if (send) NativeBridge.nativeSendGamepadButton(handle, bit, true, slot.index)
+            slot.held = slot.held or bit
+            // Full chord now held on this pad → start the hold countdown (idempotent while held).
+            if (slot.held and EXIT_CHORD == EXIT_CHORD) armExit()
+        } else {
+            if (send) NativeBridge.nativeSendGamepadButton(handle, bit, false, slot.index)
+            slot.held = slot.held and bit.inv()
+            // A chord button lifted before the hold elapsed → cancel, unless another pad still
+            // holds the full chord.
+            if (bit and EXIT_CHORD != 0 && slots.values.none { it.held and EXIT_CHORD == EXIT_CHORD }) {
+                disarmExit()
            }
        }
    }
@@ -115,6 +132,7 @@ class GamepadRouter(context: Context, private val handle: Long, private val sett
        if (pendingExit != null) return // already counting down
        val r = Runnable {
            pendingExit = null
+            onExitArmed?.invoke(false) // countdown over — drop the hint whether or not we leave
            // Fire only if the chord survived the full hold on some pad.
            val held = slots.values.filter { it.held and EXIT_CHORD == EXIT_CHORD }
            if (held.isNotEmpty()) {
@@ -126,12 +144,15 @@ class GamepadRouter(context: Context, private val handle: Long, private val sett
        }
        pendingExit = r
        mainHandler.postDelayed(r, EXIT_HOLD_MS)
+        onExitArmed?.invoke(true) // chord complete → show the "hold to quit" hint
    }

    /** Cancel a pending exit-chord hold timer. */
    private fun disarmExit() {
+        val wasArmed = pendingExit != null
        pendingExit?.let { mainHandler.removeCallbacks(it) }
        pendingExit = null
+        if (wasArmed) onExitArmed?.invoke(false) // released early — drop the hint
    }

    /**
@@ -152,8 +173,9 @@ class GamepadRouter(context: Context, private val handle: Long, private val sett

    /**
     * The controller currently mapped to wire pad [pad], for feedback routing; null if that index
-     * holds no live slot (a pad that just unplugged — the update is then dropped). Read from the
-     * feedback poll threads.
+     * holds no live slot (a pad that just unplugged — the update is then dropped) OR the slot is
+     * an [ExternalPad] (its synthetic id resolves to no InputDevice, so rumble binds naturally
+     * fall through to the capture link's own feedback path). Read from the feedback poll threads.
     */
    fun deviceForPad(pad: Int): InputDevice? {
        for ((deviceId, slot) in slots) {
@@ -162,6 +184,50 @@ class GamepadRouter(context: Context, private val handle: Long, private val sett
        return null
    }

+    /**
+     * A capture-link pad occupying a wire slot without an Android [InputDevice] — the as-is Steam
+     * Controller 2 passthrough (USB/BLE claimed directly, invisible to the input stack). Shares
+     * the real slots' lifecycle: a stable lowest-free index, Arrival-before-input, held-state
+     * flush + Remove on [close], and full participation in the emergency exit chord.
+     */
+    inner class ExternalPad internal constructor(private val syntheticId: Int, val index: Int) {
+        // Live lookup instead of a captured reference: after [close] (or a router release) the
+        // slot is gone from the table and every entry point below degrades to a safe no-op.
+        private val slot get() = slots[syntheticId]
+
+        /** One button transition (a wire [Gamepad].BTN_* bit). On-change only — the caller diffs. */
+        fun button(bit: Int, down: Boolean) {
+            slot?.let { slotButton(it, bit, down, send = true) }
+        }
+
+        /** One axis update ([Gamepad].AXIS_*: stick i16 +y=up / trigger 0..255). On-change only. */
+        fun axis(id: Int, value: Int) {
+            if (slot != null) NativeBridge.nativeSendGamepadAxis(handle, id, value, index)
+        }
+
+        /** One raw HID report, forwarded verbatim for the host's as-is virtual pad. */
+        fun hidReport(buf: java.nio.ByteBuffer, len: Int) {
+            if (slot != null) NativeBridge.nativeSendPadHidReport(handle, index, buf, len)
+        }
+
+        /** Flush held state, signal the removal, and free the wire index. Idempotent. */
+        fun close() = closeSlot(syntheticId)
+    }
+
+    /**
+     * Open a slot for a capture-link pad, declaring [pref] as its kind; null when all 16 wire
+     * indices are taken. Main thread (like the hot-plug callbacks).
+     */
+    fun openExternal(pref: Int): ExternalPad? {
+        val index = lowestFreeIndex() ?: return null
+        // Synthetic ids live below any real InputDevice id (those are positive), so they can't
+        // collide and InputDevice.getDevice(id) resolves them to null for the feedback path.
+        val syntheticId = EXTERNAL_ID_BASE - index
+        NativeBridge.nativeSendGamepadArrival(handle, pref, index)
+        slots[syntheticId] = Slot(index, Gamepad.AxisMapper(handle, index))
+        return ExternalPad(syntheticId, index)
+    }
+
    /**
     * Flush + drop every slot and unregister the hot-plug listener. Call on session teardown, AFTER
     * the feedback poll threads are joined (they read [deviceForPad]).
@@ -250,7 +316,14 @@ class GamepadRouter(context: Context, private val handle: Long, private val sett
        /** Emergency stream-exit chord: Select + Start + L1 + R1 held together (matches the legacy single-pad chord). */
        const val EXIT_CHORD = Gamepad.BTN_BACK or Gamepad.BTN_START or Gamepad.BTN_LB or Gamepad.BTN_RB

-        /** How long the exit chord must be held before the stream leaves — matches SDL/Apple `DISCONNECT_HOLD`. */
-        const val EXIT_HOLD_MS = 1500L
+        /**
+         * How long the exit chord must be held before the stream leaves — long enough that an
+         * accidental brush of the four buttons doesn't quit, short enough to feel responsive (the
+         * on-screen hint covers the gap). Roughly matches SDL/Apple `DISCONNECT_HOLD`.
+         */
+        const val EXIT_HOLD_MS = 1000L
+
+        /** Synthetic slot-key base for [ExternalPad]s — below every real (positive) InputDevice id. */
+        const val EXTERNAL_ID_BASE = -1000
    }
 }
@@ -85,6 +85,16 @@ object NativeBridge {
        name: String,
    ): String

+    /**
+     * The machine token of the most recent failed [nativeConnect]/[nativePair], cleared on read
+     * (`""` when none) — call right after a `0` handle / `""` fingerprint. A typed host rejection
+     * yields its wire token ("not-armed", "denied", "approval-timeout", "superseded", "busy",
+     * "rate-limited", "bound-other", "identity-required", "wire-version"); transport-level causes
+     * yield "crypto" (wrong PIN / identity mismatch), "timeout", "io", or "error". Lets the UI say
+     * WHY instead of the old catch-all that blamed the PIN for dead network paths.
+     */
+    external fun nativeTakeLastError(): String
+
    /**
     * Signal a **deliberate** user disconnect on [handle] before [nativeClose]: the session closes
     * with `QUIT_CLOSE_CODE` so the host tears it down immediately instead of holding the keep-alive
@@ -151,6 +161,14 @@ object NativeBridge {
     */
    external fun nativeVideoMime(handle: Long): String

+    /**
+     * A short human label for the codec the host resolved (`"H.264"` / `"HEVC"` / `"AV1"` /
+     * `"PyroWave"`), for the stats HUD's video-feed line, or `""` on a `0` handle. Distinct from
+     * [nativeVideoMime] because the MIME collapses PyroWave onto `video/hevc` and can't name it.
+     * Fixed for the session (resolved at the handshake); read once. Cheap; UI-safe.
+     */
+    external fun nativeVideoCodecLabel(handle: Long): String
+
    /**
     * Start the decode thread rendering onto [surface] (a SurfaceView's surface). Decode runs
     * entirely in Rust (NDK AMediaCodec → ANativeWindow) — no per-frame JNI. [decoderName] is the
@@ -291,6 +309,14 @@ object NativeBridge {
    /** Signal wire pad [pad] (0..15) was unplugged so the host tears its virtual device down. The core stamps the seq + re-sends. */
    external fun nativeSendGamepadRemove(handle: Long, pad: Int)

+    /**
+     * One raw HID input report from a client-captured controller (the as-is Steam Controller 2
+     * passthrough), forwarded verbatim on the rich-input plane. [buf] is a DIRECT ByteBuffer whose
+     * first [len] bytes are the report, id byte first (0x42/0x45/0x47 state, 0x43 battery, …);
+     * len is clamped to 64. Called from the capture thread at the controller's own report rate.
+     */
+    external fun nativeSendPadHidReport(handle: Long, pad: Int, buf: java.nio.ByteBuffer, len: Int)
+
    // ---- Host→client gamepad feedback: Rust pulls block ~100ms, Kotlin renders (see GamepadFeedback) ----

    /**
@@ -302,10 +328,11 @@ object NativeBridge {
    external fun nativeNextRumble(handle: Long): Long

    /**
-     * Block up to ~100 ms for the next DualSense HID-output event, written into [buf] (a direct
-     * ByteBuffer, capacity >= 64) as `[pad][kind][fields…]` (leading pad = the wire pad index to
-     * route to): Led=pad 01 r g b, PlayerLeds=pad 02 bits, Trigger=pad 03 which effect…. Returns the
-     * byte count, or -1 on timeout / session closed.
+     * Block up to ~100 ms for the next HID-output event, written into [buf] (a direct ByteBuffer,
+     * capacity >= 128) as `[pad][kind][fields…]` (leading pad = the wire pad index to route to):
+     * Led=pad 01 r g b, PlayerLeds=pad 02 bits, Trigger=pad 03 which effect…, raw as-is
+     * passthrough report=pad 05 kind report-bytes (kind 0 = output report, 1 = feature report).
+     * Returns the byte count, or -1 on timeout / session closed.
     */
    external fun nativeNextHidout(handle: Long, buf: java.nio.ByteBuffer): Int
 }
@@ -0,0 +1,241 @@
+package io.unom.punktfunk.kit
+
+import android.annotation.SuppressLint
+import android.bluetooth.BluetoothDevice
+import android.bluetooth.BluetoothGatt
+import android.bluetooth.BluetoothGattCallback
+import android.bluetooth.BluetoothGattCharacteristic
+import android.bluetooth.BluetoothGattDescriptor
+import android.bluetooth.BluetoothManager
+import android.bluetooth.BluetoothProfile
+import android.content.Context
+import android.util.Log
+import java.util.UUID
+import java.util.concurrent.atomic.AtomicBoolean
+
+/**
+ * BLE transport for a Steam Controller 2 paired directly with the device (no Puck). The standard
+ * HID service (0x1812) is claimed by the OS (and would feed the pad through the ordinary input
+ * stack in lizard-crippled form), so this talks Valve's vendor GATT service instead — the same
+ * approach Steam itself uses on hosts without a dongle.
+ *
+ * GATT operations are serialized by a small state machine (connect → MTU → discover → subscribe
+ * each notify char → lizard-off → ready); duplicate callbacks (the Android stack sometimes fires
+ * `onMtuChanged` twice) are ignored. Notified state reports arrive with the report-id byte
+ * stripped by the transport, so `0x45` (`ID_STATE_BLE`) is re-prepended for ≥40-byte payloads —
+ * the wire then carries the same id-first framing as USB.
+ *
+ * Requires BLUETOOTH_CONNECT (the caller gates on it); connection priority is bumped to HIGH to
+ * pull the connection interval from ~50 ms down to ~11 ms.
+ */
+@SuppressLint("MissingPermission")
+class Sc2BleLink(
+    private val context: Context,
+    private val onReport: (report: ByteArray, len: Int) -> Unit,
+    private val onClosed: () -> Unit,
+) {
+    private enum class State { IDLE, CONNECTING, MTU_REQUESTED, DISCOVERING, SUBSCRIBING, READY }
+
+    private val manager = context.getSystemService(Context.BLUETOOTH_SERVICE) as BluetoothManager
+
+    private var gatt: BluetoothGatt? = null
+    private var writeChar: BluetoothGattCharacteristic? = null
+    private val pendingSubs = mutableListOf<BluetoothGattCharacteristic>()
+    private var subsIndex = 0
+    private val writeBusy = AtomicBoolean(false)
+    private var lizardTicker: Thread? = null
+
+    @Volatile private var state = State.IDLE
+
+    /** Bonded devices that look like a Steam Controller (name heuristic — BLE exposes no PID here). */
+    fun pairedControllers(): List<BluetoothDevice> = runCatching {
+        manager.adapter?.bondedDevices.orEmpty().filter { dev ->
+            val n = runCatching { dev.name }.getOrNull() ?: return@filter false
+            NAME_HINTS.any { n.contains(it, ignoreCase = true) }
+        }
+    }.getOrDefault(emptyList())
+
+    /** Connect to the bonded controller at [address]. Reports start flowing once READY. */
+    fun start(address: String): Boolean {
+        val adapter = manager.adapter ?: return false
+        if (!adapter.isEnabled) return false
+        val device = runCatching { adapter.getRemoteDevice(address) }.getOrNull() ?: return false
+        state = State.CONNECTING
+        gatt = device.connectGatt(context, false, callback, BluetoothDevice.TRANSPORT_LE)
+        return true
+    }
+
+    /**
+     * Replay one raw report from the host: output reports (rumble) ride WRITE_NO_RESPONSE so they
+     * can't queue behind acks at the 25 Hz resend rate; feature reports (settings) use an acked
+     * write. The report-id byte stays in the payload (the firmware's vendor-channel framing).
+     */
+    fun writeRaw(kind: Int, data: ByteArray) {
+        if (state != State.READY || data.isEmpty()) return
+        val g = gatt ?: return
+        val ch = writeChar ?: return
+        runCatching {
+            ch.value = data
+            ch.writeType = if (kind == 0) {
+                BluetoothGattCharacteristic.WRITE_TYPE_NO_RESPONSE
+            } else {
+                BluetoothGattCharacteristic.WRITE_TYPE_DEFAULT
+            }
+            g.writeCharacteristic(ch)
+        }
+    }
+
+    private fun sendLizardOff() {
+        if (state != State.READY) return
+        val g = gatt ?: return
+        val ch = writeChar ?: return
+        if (!writeBusy.compareAndSet(false, true)) return // previous acked write still in flight
+        runCatching {
+            ch.value = Sc2Device.DISABLE_LIZARD
+            ch.writeType = BluetoothGattCharacteristic.WRITE_TYPE_DEFAULT
+            if (!g.writeCharacteristic(ch)) writeBusy.set(false)
+        }.onFailure { writeBusy.set(false) }
+    }
+
+    /** Disconnect and stop the lizard ticker. Idempotent; does not fire [onClosed]. */
+    fun stop() {
+        lizardTicker?.interrupt()
+        lizardTicker = null
+        runCatching { gatt?.disconnect() }
+        runCatching { gatt?.close() }
+        gatt = null
+        writeChar = null
+        pendingSubs.clear()
+        subsIndex = 0
+        state = State.IDLE
+    }
+
+    private val callback = object : BluetoothGattCallback() {
+        override fun onConnectionStateChange(g: BluetoothGatt, status: Int, newState: Int) {
+            when (newState) {
+                BluetoothProfile.STATE_CONNECTED -> {
+                    // ~11 ms connection interval instead of the ~50 ms default — input latency.
+                    g.requestConnectionPriority(BluetoothGatt.CONNECTION_PRIORITY_HIGH)
+                    if (state == State.CONNECTING) {
+                        state = State.MTU_REQUESTED
+                        if (!g.requestMtu(DESIRED_MTU)) {
+                            state = State.DISCOVERING
+                            g.discoverServices()
+                        }
+                    }
+                }
+                BluetoothProfile.STATE_DISCONNECTED -> {
+                    val wasLive = state != State.IDLE
+                    runCatching { g.close() }
+                    gatt = null
+                    writeChar = null
+                    pendingSubs.clear()
+                    subsIndex = 0
+                    state = State.IDLE
+                    if (wasLive) onClosed()
+                }
+            }
+        }
+
+        override fun onMtuChanged(g: BluetoothGatt, mtu: Int, status: Int) {
+            if (state != State.MTU_REQUESTED) return // fired twice on some stacks — act once
+            state = State.DISCOVERING
+            g.discoverServices()
+        }
+
+        override fun onServicesDiscovered(g: BluetoothGatt, status: Int) {
+            if (state != State.DISCOVERING || status != BluetoothGatt.GATT_SUCCESS) return
+            val valve = g.getService(VALVE_SERVICE) ?: run {
+                Log.e(TAG, "Valve vendor service missing — not an SC2?")
+                return
+            }
+            pendingSubs.clear()
+            writeChar = null
+            for (ch in valve.characteristics) {
+                val short = shortUuid(ch.uuid) ?: continue
+                val canNotify = ch.properties and BluetoothGattCharacteristic.PROPERTY_NOTIFY != 0
+                val canWrite = ch.properties and (
+                    BluetoothGattCharacteristic.PROPERTY_WRITE or
+                        BluetoothGattCharacteristic.PROPERTY_WRITE_NO_RESPONSE
+                    ) != 0
+                if (canNotify && short in NOTIFY_LOW..NOTIFY_HIGH) pendingSubs.add(ch)
+                if (canWrite && short in WRITE_LOW..WRITE_HIGH && writeChar == null) writeChar = ch
+            }
+            subsIndex = 0
+            state = State.SUBSCRIBING
+            subscribeNext(g)
+        }
+
+        override fun onDescriptorWrite(g: BluetoothGatt, d: BluetoothGattDescriptor, status: Int) {
+            if (state == State.SUBSCRIBING) subscribeNext(g)
+        }
+
+        override fun onCharacteristicWrite(g: BluetoothGatt, ch: BluetoothGattCharacteristic, status: Int) {
+            writeBusy.set(false)
+        }
+
+        override fun onCharacteristicChanged(g: BluetoothGatt, ch: BluetoothGattCharacteristic) {
+            val data = ch.value ?: return
+            // BLE strips the report-id prefix; restore 0x45 on state-sized payloads so the raw
+            // wire framing matches USB. Short payloads (battery/status) pass through as-is.
+            if (data.size >= 40) {
+                val framed = ByteArray(data.size + 1)
+                framed[0] = Sc2Device.ID_STATE_BLE.toByte()
+                System.arraycopy(data, 0, framed, 1, data.size)
+                onReport(framed, framed.size)
+            } else {
+                onReport(data, data.size)
+            }
+        }
+    }
+
+    private fun subscribeNext(g: BluetoothGatt) {
+        if (subsIndex >= pendingSubs.size) {
+            state = State.READY
+            Log.i(TAG, "SC2 BLE link up (${pendingSubs.size} notify chars)")
+            sendLizardOff()
+            // The firmware watchdog re-enables lizard mode; refresh on SDL's cadence until the
+            // host's Steam takes over via the raw plane (its writes land through writeRaw too).
+            lizardTicker = Thread({
+                while (state == State.READY) {
+                    try {
+                        Thread.sleep(Sc2Device.LIZARD_REFRESH_MS)
+                    } catch (_: InterruptedException) {
+                        return@Thread
+                    }
+                    sendLizardOff()
+                }
+            }, "pf-sc2-lizard").apply { isDaemon = true; start() }
+            return
+        }
+        val ch = pendingSubs[subsIndex++]
+        g.setCharacteristicNotification(ch, true)
+        val cccd = ch.getDescriptor(CCCD) ?: return subscribeNext(g)
+        cccd.value = BluetoothGattDescriptor.ENABLE_NOTIFICATION_VALUE
+        if (!g.writeDescriptor(cccd)) subscribeNext(g) // lose this one, try the rest
+    }
+
+    /** The 32-bit short id of a Valve vendor UUID, or null for foreign UUIDs. */
+    private fun shortUuid(uuid: UUID): Long? {
+        val s = uuid.toString()
+        if (!s.endsWith(VALVE_UUID_TAIL)) return null
+        return s.substring(0, 8).toLongOrNull(16)
+    }
+
+    private companion object {
+        const val TAG = "Sc2BleLink"
+
+        val VALVE_SERVICE: UUID = UUID.fromString("100f6c32-1735-4313-b402-38567131e5f3")
+        const val VALVE_UUID_TAIL = "-1735-4313-b402-38567131e5f3"
+        const val NOTIFY_LOW = 0x100f6c75L
+        const val NOTIFY_HIGH = 0x100f6c7aL
+        const val WRITE_LOW = 0x100f6cb5L
+        const val WRITE_HIGH = 0x100f6cbeL
+        val CCCD: UUID = UUID.fromString("00002902-0000-1000-8000-00805f9b34fb")
+
+        val NAME_HINTS = listOf("Steam Ctrl", "Steam Controller", "SteamController", "Valve")
+
+        /** Enough for a state payload (45 B) + ATT header with margin. */
+        const val DESIRED_MTU = 100
+    }
+}
@@ -0,0 +1,316 @@
+package io.unom.punktfunk.kit
+
+import android.content.Context
+import android.hardware.usb.UsbDevice
+import android.util.Log
+import java.nio.ByteBuffer
+
+/**
+ * One captured Steam Controller 2 — the glue between a transport link ([Sc2UsbLink] /
+ * [Sc2BleLink]) and one of two consumers:
+ *
+ * **Stream mode** (`router != null`, owned by StreamScreen):
+ * - **Raw plane (the point):** every input report is forwarded verbatim
+ *   ([GamepadRouter.ExternalPad.hidReport]) for the host's as-is virtual `28DE:1302` pad, which
+ *   Steam Input drives like the physical controller.
+ * - **Typed mirror:** buttons/sticks/triggers are ALSO diffed onto the ordinary per-transition
+ *   plane, so the emergency exit chord works, and a host that degraded the kind (no UHID → the
+ *   Xbox 360 pad) still gets a playable controller.
+ * - **Raw return:** the host's hidraw writes (Steam's `0x80` rumble output reports, lizard/IMU
+ *   feature settings) arrive via [GamepadFeedback.onHidRaw] → [onHidRaw] → the link, landing on
+ *   the real controller's motors/firmware.
+ *
+ * **UI mode** (`router == null`, owned by MainActivity while NOT streaming): the lizard-mode
+ * kb/mouse never produces gamepad events, so an uncaptured SC2 can't drive the console UI at
+ * all. Here the parsed state is edge-detected into [onUiKey] navigation transitions instead
+ * (D-pad + face buttons + Start/Select; the left stick synthesizes one D-pad step per push,
+ * mirroring MainActivity's stick-to-focus behavior for ordinary pads).
+ *
+ * The wire slot is claimed lazily on the FIRST state report — a Puck with no controller powered
+ * on stays invisible to the host — and released (with a wireless-disconnect event or on [stop])
+ * so pad indices never leak. Report callbacks arrive on the link's own thread; the router's slot
+ * table and chord timer are thread-safe for this (same contract as the feedback poll threads),
+ * and UI-mode consumers hop to the main thread themselves.
+ */
+class Sc2Capture(
+    context: Context,
+    private val router: GamepadRouter? = null,
+) {
+    private val usb = Sc2UsbLink(context, ::onReport, ::onLinkClosed)
+    private val ble = Sc2BleLink(context, ::onReport, ::onLinkClosed)
+    private var activeLink: Int = LINK_NONE
+
+    /** True when the USB link is a Puck dongle — the only transport whose wireless-status
+     *  reports are authoritative. A WIRED pad also emits them, truthfully reporting "no radio
+     *  link" — acting on that tore the slot down 255 ms after creation (first on-glass run). */
+    private var dongleLink = false
+
+    private var pad: GamepadRouter.ExternalPad? = null
+    private val rawBuf: ByteBuffer = ByteBuffer.allocateDirect(64)
+    /** Puck connect arrives before its first state report (and therefore before a wire pad exists).
+     * Preserve it so the native virtual Puck slot sees the same connect edge before state. */
+    private val pendingWireless = ByteArray(2)
+    private var pendingWirelessLen = 0
+
+    // Typed-mirror diff state (wire units).
+    private val state = Sc2Device.State()
+    private var wireButtons = 0
+    private val lastAxis = IntArray(6) { Int.MIN_VALUE }
+
+    /** Report ids seen so far — each logged once, for remote diagnosis of what the pad emits. */
+    private val seenIds = HashSet<Int>()
+
+    // UI-mode state (router == null): held navigation keys + the stick's current synth direction.
+    private var uiHeld = HashSet<Int>()
+    private var uiStickDir = 0
+
+    /**
+     * UI-mode sink: one navigation key transition (an Android `KeyEvent.KEYCODE_*`), invoked on
+     * the LINK thread — the consumer hops to the main thread. Set before [startUsb]/[startBle].
+     */
+    @Volatile
+    var onUiKey: ((keyCode: Int, down: Boolean) -> Unit)? = null
+
+    /**
+     * Fired (link thread) when the capture engages or drops — lets the app surface "SC2
+     * connected" in the console-UI gate and the Controllers screen.
+     */
+    @Volatile
+    var onActiveChanged: ((active: Boolean) -> Unit)? = null
+
+    val isActive: Boolean get() = activeLink != LINK_NONE
+
+    /** First attached SC2/Puck USB device, for the permission flow. */
+    fun findUsbDevice(): UsbDevice? = usb.findDevice()
+
+    /**
+     * The first already-bonded BLE Steam Controller's address, or null. The caller checks
+     * BLUETOOTH_CONNECT first (without it the bonded list reads as empty anyway).
+     */
+    fun pairedBleAddress(): String? = ble.pairedControllers().firstOrNull()?.address
+
+    /** Start capturing [dev] over USB (permission already granted). */
+    fun startUsb(dev: UsbDevice): Boolean {
+        if (activeLink != LINK_NONE) return false
+        val ok = usb.start(dev)
+        if (ok) {
+            activeLink = LINK_USB
+            dongleLink = dev.productId != Sc2Device.PID_WIRED
+            onActiveChanged?.invoke(true)
+        }
+        return ok
+    }
+
+    /** Start capturing the bonded BLE controller at [address]. */
+    fun startBle(address: String): Boolean {
+        if (activeLink != LINK_NONE) return false
+        val ok = ble.start(address)
+        if (ok) {
+            activeLink = LINK_BLE
+            onActiveChanged?.invoke(true)
+        }
+        return ok
+    }
+
+    /** Replay a host raw write on the physical pad — wire to [GamepadFeedback.onHidRaw]. */
+    fun onHidRaw(padIndex: Int, kind: Int, data: ByteArray) {
+        if (padIndex != pad?.index) return // addressed to some other controller
+        when (activeLink) {
+            LINK_USB -> usb.writeRaw(kind, data)
+            LINK_BLE -> ble.writeRaw(kind, data)
+        }
+    }
+
+    /** Stop the link and free the wire slot (host tears the virtual pad down). Idempotent. */
+    fun stop() {
+        val wasActive = activeLink != LINK_NONE
+        when (activeLink) {
+            LINK_USB -> usb.stop()
+            LINK_BLE -> ble.stop()
+        }
+        activeLink = LINK_NONE
+        dongleLink = false
+        releaseSlot()
+        releaseUiKeys()
+        if (wasActive) onActiveChanged?.invoke(false)
+    }
+
+    // ---- link callbacks (link thread) ----
+
+    private fun onReport(report: ByteArray, len: Int) {
+        val id = report[0].toInt() and 0xFF
+        if (seenIds.add(id)) Log.i(TAG, "SC2 report id=0x%02x seen (len=%d)".format(id, len))
+        // Wireless status: authoritative ONLY through a Puck dongle (powering the pad off frees
+        // its wire index + the host's virtual device). A wired/BLE pad emits it too — truthfully
+        // saying "no radio link" — and must NOT tear the slot down (SDL's wired path likewise
+        // marks the controller connected unconditionally and reconnects on any state report).
+        if ((id == Sc2Device.ID_WIRELESS || id == Sc2Device.ID_WIRELESS_X) && len >= 2) {
+            if (dongleLink) {
+                when (report[1].toInt() and 0xFF) {
+                    Sc2Device.WIRELESS_CONNECT -> {
+                        pendingWireless[0] = report[0]
+                        pendingWireless[1] = report[1]
+                        pendingWirelessLen = 2
+                    }
+                    Sc2Device.WIRELESS_DISCONNECT -> {
+                        pendingWirelessLen = 0
+                        Log.i(TAG, "Puck reports controller powered off — releasing wire slot")
+                        releaseSlot()
+                        releaseUiKeys()
+                    }
+                }
+            }
+            return
+        }
+        if (!Sc2Device.parseState(report, len, state)) {
+            // Battery/status and future report types still belong to the as-is stream.
+            forwardRaw(report, len)
+            return
+        }
+        if (router == null) {
+            mirrorUi()
+            return
+        }
+        val pref = if (dongleLink) {
+            Gamepad.PREF_STEAMCONTROLLER2_PUCK
+        } else {
+            Gamepad.PREF_STEAMCONTROLLER2
+        }
+        val p = pad ?: router.openExternal(pref)?.also {
+            pad = it
+            Log.i(
+                TAG,
+                "SC2 captured → wire pad ${it.index} (${if (dongleLink) "Puck" else "direct"} passthrough)",
+            )
+            if (pendingWirelessLen > 0) {
+                forwardRaw(pendingWireless, pendingWirelessLen)
+                pendingWirelessLen = 0
+            }
+        } ?: return // all 16 wire indices taken — drop until one frees
+        forwardRaw(report, len)
+        mirrorTyped(p)
+    }
+
+    private fun forwardRaw(report: ByteArray, len: Int) {
+        val p = pad ?: return
+        val n = len.coerceAtMost(rawBuf.capacity())
+        rawBuf.clear()
+        rawBuf.put(report, 0, n)
+        p.hidReport(rawBuf, n)
+    }
+
+    /** Diff the parsed state onto the per-transition plane (buttons + axes, on change only). */
+    private fun mirrorTyped(p: GamepadRouter.ExternalPad) {
+        val wired = Sc2Device.wireButtons(state.buttons)
+        var changed = wired xor wireButtons
+        while (changed != 0) {
+            val bit = changed and -changed // lowest changed bit
+            p.button(bit, wired and bit != 0)
+            changed = changed and bit.inv()
+        }
+        wireButtons = wired
+        axis(p, Gamepad.AXIS_LS_X, state.lsX)
+        axis(p, Gamepad.AXIS_LS_Y, state.lsY)
+        axis(p, Gamepad.AXIS_RS_X, state.rsX)
+        axis(p, Gamepad.AXIS_RS_Y, state.rsY)
+        axis(p, Gamepad.AXIS_LT, state.lt)
+        axis(p, Gamepad.AXIS_RT, state.rt)
+    }
+
+    private fun axis(p: GamepadRouter.ExternalPad, id: Int, v: Int) {
+        if (lastAxis[id] == v) return
+        lastAxis[id] = v
+        p.axis(id, v)
+    }
+
+    /**
+     * UI mode: edge-detect the parsed state into navigation key transitions. Buttons map to
+     * their Android keycodes (press AND release, so the focus system sees real holds); the left
+     * stick synthesizes ONE D-pad step per push past half deflection — the same single-move
+     * behavior MainActivity gives ordinary pads' sticks.
+     */
+    private fun mirrorUi() {
+        val sink = onUiKey ?: return
+        val held = HashSet<Int>(8)
+        var i = 0
+        while (i < UI_KEY_MAP.size) {
+            if (state.buttons and UI_KEY_MAP[i] != 0) held.add(UI_KEY_MAP[i + 1])
+            i += 2
+        }
+        for (key in held) if (key !in uiHeld) sink(key, true)
+        for (key in uiHeld) if (key !in held) sink(key, false)
+        uiHeld = held
+        // Left stick → a HELD D-pad direction (device convention: +y = up): pressed while
+        // deflected, released on centre/direction change. The console UI's probe machinery
+        // turns a held direction into its own auto-repeat, exactly like a physical D-pad; the
+        // focus-hook path moves once per press edge either way.
+        val dir = when {
+            state.lsX <= -STICK_NAV -> android.view.KeyEvent.KEYCODE_DPAD_LEFT
+            state.lsX >= STICK_NAV -> android.view.KeyEvent.KEYCODE_DPAD_RIGHT
+            state.lsY >= STICK_NAV -> android.view.KeyEvent.KEYCODE_DPAD_UP
+            state.lsY <= -STICK_NAV -> android.view.KeyEvent.KEYCODE_DPAD_DOWN
+            else -> 0
+        }
+        if (dir != uiStickDir) {
+            // The D-pad bits share these keycodes; don't release a direction the physical
+            // D-pad itself still holds (uiHeld tracks the button-sourced state).
+            if (uiStickDir != 0 && uiStickDir !in uiHeld) sink(uiStickDir, false)
+            if (dir != 0 && dir !in uiHeld) sink(dir, true)
+            uiStickDir = dir
+        }
+    }
+
+    /** Release every held UI-mode key (link drop / stop) so nothing sticks in the focus system. */
+    private fun releaseUiKeys() {
+        val sink = onUiKey
+        if (sink != null) {
+            for (key in uiHeld) sink(key, false)
+            if (uiStickDir != 0 && uiStickDir !in uiHeld) sink(uiStickDir, false)
+        }
+        uiHeld = HashSet()
+        uiStickDir = 0
+    }
+
+    private fun onLinkClosed() {
+        Log.i(TAG, "SC2 link closed (unplug / power-off)")
+        activeLink = LINK_NONE
+        dongleLink = false
+        releaseSlot()
+        releaseUiKeys()
+        onActiveChanged?.invoke(false)
+    }
+
+    private fun releaseSlot() {
+        pad?.close()
+        pad = null
+        wireButtons = 0
+        lastAxis.fill(Int.MIN_VALUE)
+        pendingWirelessLen = 0
+    }
+
+    private companion object {
+        const val TAG = "Sc2Capture"
+        const val LINK_NONE = 0
+        const val LINK_USB = 1
+        const val LINK_BLE = 2
+
+        /** Half deflection (device i16 range) — the stick-to-focus threshold. */
+        const val STICK_NAV = 16384
+
+        /** UI-mode mapping: SC2 button bit → Android keycode, as (bit, key) pairs. */
+        val UI_KEY_MAP = intArrayOf(
+            Sc2Device.DPAD_UP, android.view.KeyEvent.KEYCODE_DPAD_UP,
+            Sc2Device.DPAD_DOWN, android.view.KeyEvent.KEYCODE_DPAD_DOWN,
+            Sc2Device.DPAD_LEFT, android.view.KeyEvent.KEYCODE_DPAD_LEFT,
+            Sc2Device.DPAD_RIGHT, android.view.KeyEvent.KEYCODE_DPAD_RIGHT,
+            Sc2Device.A, android.view.KeyEvent.KEYCODE_BUTTON_A,
+            Sc2Device.B, android.view.KeyEvent.KEYCODE_BUTTON_B,
+            Sc2Device.X, android.view.KeyEvent.KEYCODE_BUTTON_X,
+            Sc2Device.Y, android.view.KeyEvent.KEYCODE_BUTTON_Y,
+            Sc2Device.LB, android.view.KeyEvent.KEYCODE_BUTTON_L1,
+            Sc2Device.RB, android.view.KeyEvent.KEYCODE_BUTTON_R1,
+            Sc2Device.MENU, android.view.KeyEvent.KEYCODE_BUTTON_START,
+            Sc2Device.VIEW, android.view.KeyEvent.KEYCODE_BUTTON_SELECT,
+        )
+    }
+}
@@ -0,0 +1,165 @@
+package io.unom.punktfunk.kit
+
+/**
+ * Steam Controller 2 (2026, Valve "Ibex" / SDL "Triton") protocol constants + the light state
+ * parser the CLIENT needs. The full report rides the wire verbatim (`nativeSendPadHidReport` →
+ * the host's as-is virtual pad); this parser only extracts what the client itself consumes: the
+ * button word for the typed mirror + exit chord, and sticks/triggers for the degrade path.
+ *
+ * Protocol ground truth: SDL's `SDL_hidapi_steam_triton.c` + `steam/controller_structs.h`
+ * (Valve-maintained), mirrored host-side in `punktfunk-host`'s `triton_proto.rs`.
+ */
+object Sc2Device {
+    const val VID_VALVE = 0x28DE
+
+    /** Wired controller. */
+    const val PID_WIRED = 0x1302
+
+    /** Direct BLE identity (transport handled by [Sc2BleLink], not USB). */
+    const val PID_BLE = 0x1303
+
+    /** The wireless Puck dongles (Proteus / Nereid) — controller on USB interfaces 2..5. */
+    const val PID_DONGLE_PROTEUS = 0x1304
+    const val PID_DONGLE_NEREID = 0x1305
+
+    val USB_PIDS = setOf(PID_WIRED, PID_DONGLE_PROTEUS, PID_DONGLE_NEREID)
+
+    /** Dongle interface range that carries controllers (SDL: "interfaces 2..5, currently"). */
+    val DONGLE_IFACES = 2..5
+
+    // Input report ids (`ETritonReportIDTypes`). State layouts share every offset the client
+    // reads (seq/buttons/triggers/sticks); 0x47 only diverges from byte 18 (trackpad timestamp).
+    const val ID_STATE = 0x42
+    const val ID_BATTERY = 0x43
+    const val ID_STATE_BLE = 0x45
+    const val ID_WIRELESS_X = 0x46
+    const val ID_STATE_TIMESTAMP = 0x47
+    const val ID_WIRELESS = 0x79
+
+    /** Wireless status payload byte: controller connected/disconnected through the Puck. */
+    const val WIRELESS_DISCONNECT = 1
+    const val WIRELESS_CONNECT = 2
+
+    // Button bits in the state report's u32 (SDL `TritonButtons`).
+    const val A = 0x00000001
+    const val B = 0x00000002
+    const val X = 0x00000004
+    const val Y = 0x00000008
+    const val QAM = 0x00000010
+    const val R3 = 0x00000020
+    const val VIEW = 0x00000040
+    const val R4 = 0x00000080
+    const val R5 = 0x00000100
+    const val RB = 0x00000200
+    const val DPAD_DOWN = 0x00000400
+    const val DPAD_RIGHT = 0x00000800
+    const val DPAD_LEFT = 0x00001000
+    const val DPAD_UP = 0x00002000
+    const val MENU = 0x00004000
+    const val L3 = 0x00008000
+    const val STEAM = 0x00010000
+    const val L4 = 0x00020000
+    const val L5 = 0x00040000
+    const val LB = 0x00080000
+    const val RPAD_CLICK = 0x00400000
+
+    /**
+     * The feature report that turns lizard mode (built-in keyboard/mouse emulation) off:
+     * `[report id 1][ID_SET_SETTINGS_VALUES 0x87][length 3][SETTING_LIZARD_MODE 9]
+     * [LIZARD_MODE_OFF u16]`, zero-padded to the 64-byte feature size. The firmware watchdog
+     * re-enables lizard mode after a few seconds of silence, so this is re-sent every
+     * [LIZARD_REFRESH_MS] (SDL's cadence) — and the host's Steam sends its own through the raw
+     * plane once it grabs the virtual pad, which lands here too.
+     */
+    val DISABLE_LIZARD: ByteArray = ByteArray(64).also {
+        it[0] = 0x01 // feature report id
+        it[1] = 0x87.toByte() // ID_SET_SETTINGS_VALUES
+        it[2] = 3 // one ControllerSetting {u8 num, u16 value}
+        it[3] = 9 // SETTING_LIZARD_MODE
+        // [4..6] = LIZARD_MODE_OFF (0) — already zero
+    }
+
+    /**
+     * Force firmware-calibrated signed i16 stick coordinates. Steam sends this during physical
+     * controller initialization (`SETTING_ENABLE_RAW_JOYSTICK` = 0x2e, value 0); without it a
+     * controller previously opened in raw mode reports ADC coordinates around 0..3200, which a
+     * Triton consumer interprets as only a few percent of full travel.
+     */
+    val NORMALIZE_JOYSTICKS: ByteArray = ByteArray(64).also {
+        it[0] = 0x01 // feature report id
+        it[1] = 0x87.toByte() // ID_SET_SETTINGS_VALUES
+        it[2] = 3 // one ControllerSetting {u8 num, u16 value}
+        it[3] = 0x2E // SETTING_ENABLE_RAW_JOYSTICK
+        // [4..6] = disabled (0) — firmware emits calibrated signed i16 values
+    }
+
+    const val LIZARD_REFRESH_MS = 3000L
+
+    /** Wire mapping: SC2 button bit → punktfunk `Gamepad.BTN_*`, the inverse of the host's
+     *  typed-fallback mapping (`triton_proto::from_gamepad`): paddles R4/L4/R5/L5 =
+     *  PADDLE1/2/3/4, QAM = MISC1, right-pad click = the touchpad wire bit. */
+    private val WIRE_MAP = intArrayOf(
+        A, Gamepad.BTN_A,
+        B, Gamepad.BTN_B,
+        X, Gamepad.BTN_X,
+        Y, Gamepad.BTN_Y,
+        LB, Gamepad.BTN_LB,
+        RB, Gamepad.BTN_RB,
+        VIEW, Gamepad.BTN_BACK,
+        MENU, Gamepad.BTN_START,
+        STEAM, Gamepad.BTN_GUIDE,
+        L3, Gamepad.BTN_LS_CLICK,
+        R3, Gamepad.BTN_RS_CLICK,
+        DPAD_UP, Gamepad.BTN_DPAD_UP,
+        DPAD_DOWN, Gamepad.BTN_DPAD_DOWN,
+        DPAD_LEFT, Gamepad.BTN_DPAD_LEFT,
+        DPAD_RIGHT, Gamepad.BTN_DPAD_RIGHT,
+        QAM, Gamepad.BTN_MISC1,
+        R4, Gamepad.BTN_PADDLE1,
+        L4, Gamepad.BTN_PADDLE2,
+        R5, Gamepad.BTN_PADDLE3,
+        L5, Gamepad.BTN_PADDLE4,
+        RPAD_CLICK, Gamepad.BTN_TOUCHPAD,
+    )
+
+    /** Translate an SC2 button word into the wire `Gamepad.BTN_*` bitmask. */
+    fun wireButtons(sc2: Int): Int {
+        var out = 0
+        var i = 0
+        while (i < WIRE_MAP.size) {
+            if (sc2 and WIRE_MAP[i] != 0) out = out or WIRE_MAP[i + 1]
+            i += 2
+        }
+        return out
+    }
+
+    /** The typed-mirror fields of one state report (buttons/sticks/triggers only). */
+    class State {
+        var buttons = 0 // SC2 bit layout
+        var lsX = 0; var lsY = 0 // i16, +y = up (device convention = wire convention)
+        var rsX = 0; var rsY = 0
+        var lt = 0; var rt = 0 // 0..255 (device 0..32767 scaled down)
+    }
+
+    /**
+     * Parse the client-consumed fields out of a state report (`0x42`/`0x45`/`0x47` — identical
+     * offsets for everything read here) into [out]. Returns false for non-state / short reports.
+     */
+    fun parseState(report: ByteArray, len: Int, out: State): Boolean {
+        if (len < 18) return false
+        when (report[0].toInt() and 0xFF) {
+            ID_STATE, ID_STATE_BLE, ID_STATE_TIMESTAMP -> {}
+            else -> return false
+        }
+        fun i16(o: Int) = ((report[o + 1].toInt() shl 8) or (report[o].toInt() and 0xFF)).toShort().toInt()
+        out.buttons = (report[2].toInt() and 0xFF) or
+            ((report[3].toInt() and 0xFF) shl 8) or
+            ((report[4].toInt() and 0xFF) shl 16) or
+            ((report[5].toInt() and 0xFF) shl 24)
+        out.lt = (i16(6).coerceIn(0, 32767)) shr 7
+        out.rt = (i16(8).coerceIn(0, 32767)) shr 7
+        out.lsX = i16(10); out.lsY = i16(12)
+        out.rsX = i16(14); out.rsY = i16(16)
+        return true
+    }
+}
@@ -0,0 +1,379 @@
+package io.unom.punktfunk.kit
+
+import android.content.BroadcastReceiver
+import android.content.Context
+import android.content.Intent
+import android.content.IntentFilter
+import android.hardware.usb.UsbConstants
+import android.hardware.usb.UsbDevice
+import android.hardware.usb.UsbDeviceConnection
+import android.hardware.usb.UsbEndpoint
+import android.hardware.usb.UsbInterface
+import android.hardware.usb.UsbManager
+import android.hardware.usb.UsbRequest
+import android.os.Build
+import android.util.Log
+import java.nio.ByteBuffer
+import java.util.concurrent.ConcurrentLinkedQueue
+import java.util.concurrent.TimeoutException
+
+/**
+ * USB transport for a Steam Controller 2 — wired (`28DE:1302`) or through the wireless Puck
+ * dongle (`1304`/`1305`). Claims the controller interface(s) — detaching the OS input stack, so
+ * the pad can't double-drive the ordinary InputDevice path — runs a multiplexed [UsbRequest]
+ * read loop, keeps lizard mode off on the firmware watchdog cadence, and replays the host's raw
+ * writes (Steam's rumble output reports / settings feature reports) back to the device.
+ *
+ * **The Puck claims ALL controller interfaces (2..5):** the dongle hosts up to four pads, one
+ * HID interface each, and there is no way to know which slot a controller bonded to — claiming
+ * only interface 2 read silence while Android's input stack kept the others (the round-2
+ * on-glass symptom: the pad surfaced as a generic InputDevice → Xbox360). Whichever interface
+ * streams state becomes the write target for rumble/settings.
+ *
+ * **Unplug is signalled, never inferred from silence:** a quiet controller is not a missing one
+ * (round 2's wired disconnect was the 5 s silence heuristic firing on an idle pad). The real
+ * signals are [UsbManager.ACTION_USB_DEVICE_DETACHED] for this device, or `requestWait`
+ * returning sustained hard errors (every transfer fails instantly once the fd is dead).
+ */
+class Sc2UsbLink(
+    private val context: Context,
+    private val onReport: (report: ByteArray, len: Int) -> Unit,
+    private val onClosed: () -> Unit,
+) {
+    private val usb = context.getSystemService(Context.USB_SERVICE) as UsbManager
+
+    /** One claimed interface: its endpoints + the read state the reader thread owns. */
+    private class Claim(
+        val iface: UsbInterface,
+        val epIn: UsbEndpoint,
+        val epOut: UsbEndpoint?,
+    ) {
+        val inBuf: ByteBuffer = ByteBuffer.allocate(64)
+        var inReq: UsbRequest? = null
+        var outReq: UsbRequest? = null
+        var outBusy = false
+        var reports = 0L
+    }
+
+    private var connection: UsbDeviceConnection? = null
+    private var device: UsbDevice? = null
+    private var claims: List<Claim> = emptyList()
+
+    /** The claim whose IN endpoint last produced data — where rumble/settings writes go.
+     *  Written by the reader thread, read by the feedback thread (feature control transfers). */
+    @Volatile private var activeClaim: Claim? = null
+
+    /** Pending OUT reports (Steam's forwarded haptics), submitted by the reader thread — only
+     *  one thread may drive a connection's [UsbRequest]s ([UsbDeviceConnection.requestWait]
+     *  returns ANY completed request; a second waiter would steal the reader's completions). */
+    private val outQueue = ConcurrentLinkedQueue<ByteArray>()
+
+    private var reader: Thread? = null
+    private var detachReceiver: BroadcastReceiver? = null
+
+    @Volatile private var running = false
+
+    /** First attached SC2 (wired or Puck), or null. Does not need USB permission to enumerate. */
+    fun findDevice(): UsbDevice? = usb.deviceList.values.firstOrNull {
+        it.vendorId == Sc2Device.VID_VALVE && it.productId in Sc2Device.USB_PIDS
+    }
+
+    /**
+     * Claim [dev]'s controller interface(s) and start the read loop. The caller has already
+     * obtained USB permission. Returns false when nothing could be claimed.
+     */
+    fun start(dev: UsbDevice): Boolean {
+        if (!usb.hasPermission(dev)) {
+            Log.e(TAG, "no USB permission for ${dev.deviceName}")
+            return false
+        }
+        val conn = usb.openDevice(dev) ?: run {
+            Log.e(TAG, "openDevice failed for ${dev.deviceName}")
+            return false
+        }
+        val claimed = claimControllerInterfaces(dev, conn)
+        if (claimed.isEmpty()) {
+            Log.e(TAG, "no claimable SC2 interface on ${dev.deviceName} (PID=0x%04x)".format(dev.productId))
+            conn.close()
+            return false
+        }
+        connection = conn
+        device = dev
+        claims = claimed
+        running = true
+        Log.i(
+            TAG,
+            "SC2 USB link up: PID=0x%04x ifaces=%s".format(
+                dev.productId,
+                claimed.joinToString {
+                    "%d(in=0x%02x out=%s)".format(
+                        it.iface.id, it.epIn.address,
+                        it.epOut?.let { e -> "0x%02x".format(e.address) } ?: "-",
+                    )
+                },
+            ),
+        )
+        // The REAL unplug signal — silence never is (an idle pad may simply stop streaming).
+        val receiver = object : BroadcastReceiver() {
+            override fun onReceive(c: Context?, intent: Intent?) {
+                if (intent?.action != UsbManager.ACTION_USB_DEVICE_DETACHED) return
+                val gone: UsbDevice? = intent.getParcelableExtra(UsbManager.EXTRA_DEVICE)
+                if (gone?.deviceName == dev.deviceName) {
+                    Log.i(TAG, "SC2 USB detached (${dev.deviceName})")
+                    if (running) {
+                        running = false
+                        onClosed()
+                    }
+                }
+            }
+        }
+        detachReceiver = receiver
+        val filter = IntentFilter(UsbManager.ACTION_USB_DEVICE_DETACHED)
+        if (Build.VERSION.SDK_INT >= 33) {
+            context.registerReceiver(receiver, filter, Context.RECEIVER_NOT_EXPORTED)
+        } else {
+            @Suppress("UnspecifiedRegisterReceiverFlag")
+            context.registerReceiver(receiver, filter)
+        }
+        claimed.forEach { configureInputMode(conn, it.iface.id) }
+        reader = Thread({ readLoop(conn, claimed) }, "pf-sc2-usb").apply {
+            isDaemon = true
+            start()
+        }
+        return true
+    }
+
+    /**
+     * Claim every candidate controller interface: the wired pad's single HID interface, or ALL
+     * of a Puck's controller slots (interfaces 2..5 — the controller may be bonded to any of
+     * them). `force = true` detaches the kernel/OS driver, so the pad also vanishes from
+     * Android's own input stack while captured.
+     */
+    private fun claimControllerInterfaces(dev: UsbDevice, conn: UsbDeviceConnection): List<Claim> {
+        val dongle = dev.productId != Sc2Device.PID_WIRED
+        val out = mutableListOf<Claim>()
+        for (i in 0 until dev.interfaceCount) {
+            val iface = dev.getInterface(i)
+            if (dongle && iface.id !in Sc2Device.DONGLE_IFACES) continue
+            val hidOrVendor = iface.interfaceClass == UsbConstants.USB_CLASS_HID ||
+                iface.interfaceClass == 0xFF
+            if (!hidOrVendor) continue
+            var inEp: UsbEndpoint? = null
+            var outEp: UsbEndpoint? = null
+            for (e in 0 until iface.endpointCount) {
+                val ep = iface.getEndpoint(e)
+                val usable = ep.type == UsbConstants.USB_ENDPOINT_XFER_INT ||
+                    ep.type == UsbConstants.USB_ENDPOINT_XFER_BULK
+                if (!usable) continue
+                if (ep.direction == UsbConstants.USB_DIR_IN && inEp == null) inEp = ep
+                if (ep.direction == UsbConstants.USB_DIR_OUT && outEp == null) outEp = ep
+            }
+            if (inEp == null) continue
+            if (conn.claimInterface(iface, true)) {
+                out.add(Claim(iface, inEp, outEp))
+            } else {
+                Log.w(TAG, "could not claim iface ${iface.id}")
+            }
+        }
+        return out
+    }
+
+    /**
+     * The multiplexed read loop: one IN request queued per claimed interface at all times, OUT
+     * writes submitted from [outQueue], completions routed via [UsbRequest.getClientData].
+     */
+    private fun readLoop(conn: UsbDeviceConnection, claims: List<Claim>) {
+        val live = claims.filter { c ->
+            val req = UsbRequest()
+            if (!req.initialize(conn, c.epIn)) {
+                Log.w(TAG, "UsbRequest.initialize(IN, iface ${c.iface.id}) failed")
+                return@filter false
+            }
+            req.clientData = c
+            c.inReq = req
+            c.epOut?.let { ep ->
+                val o = UsbRequest()
+                if (o.initialize(conn, ep)) {
+                    o.clientData = c
+                    c.outReq = o
+                } else {
+                    Log.w(TAG, "UsbRequest.initialize(OUT, iface ${c.iface.id}) failed — output reports via EP0")
+                }
+            }
+            c.inBuf.clear()
+            req.queue(c.inBuf)
+        }
+        if (live.isEmpty()) {
+            Log.e(TAG, "no IN request could be queued")
+            finishReader(claims)
+            return
+        }
+        val scratch = ByteArray(64)
+        var lastLizard = android.os.SystemClock.elapsedRealtime()
+        var errorsSince = 0L // elapsedRealtime of the first hard error in the current streak
+        try {
+            while (running) {
+                val now = android.os.SystemClock.elapsedRealtime()
+                if (now - lastLizard >= Sc2Device.LIZARD_REFRESH_MS) {
+                    // Refresh both required firmware modes. The raw-joystick setting is normally
+                    // persistent, but replaying it also repairs a host/driver that enabled ADC
+                    // coordinates after capture started.
+                    val target = activeClaim
+                    if (target != null) configureInputMode(conn, target.iface.id)
+                    else live.forEach { configureInputMode(conn, it.iface.id) }
+                    lastLizard = now
+                }
+                // Submit the next pending OUT report on the active (else first) interface.
+                val outTarget = (activeClaim ?: live.first()).takeIf { it.outReq != null && !it.outBusy }
+                if (outTarget != null) {
+                    outQueue.poll()?.let { data ->
+                        if (outTarget.outReq!!.queue(ByteBuffer.wrap(data))) outTarget.outBusy = true
+                    }
+                }
+                val done = try {
+                    conn.requestWait(READ_TIMEOUT_MS)
+                } catch (_: TimeoutException) {
+                    // A quiet controller is NOT an unplug — keep listening indefinitely; the
+                    // detach broadcast is the real signal.
+                    errorsSince = 0L
+                    continue
+                }
+                if (done == null) {
+                    // Hard error. On a real unplug these storm continuously (the detach
+                    // broadcast usually beats us to it); tolerate transient ones.
+                    if (errorsSince == 0L) errorsSince = now
+                    if (now - errorsSince >= ERROR_UNPLUG_MS) {
+                        Log.i(TAG, "SC2 USB request errors persisting ${now - errorsSince} ms — treating as unplug")
+                        break
+                    }
+                    continue
+                }
+                errorsSince = 0L
+                val claim = done.clientData as? Claim ?: continue
+                if (done === claim.inReq) {
+                    val n = claim.inBuf.position()
+                    if (n > 0) {
+                        claim.inBuf.flip()
+                        claim.inBuf.get(scratch, 0, n)
+                        if (claim.reports++ == 0L) {
+                            Log.i(
+                                TAG,
+                                "SC2 first report on iface %d: id=0x%02x len=%d".format(
+                                    claim.iface.id, scratch[0].toInt() and 0xFF, n,
+                                ),
+                            )
+                        }
+                        activeClaim = claim
+                        onReport(scratch, n)
+                    }
+                    claim.inBuf.clear()
+                    if (!claim.inReq!!.queue(claim.inBuf)) {
+                        Log.i(TAG, "re-queue(IN, iface ${claim.iface.id}) failed — treating as unplug")
+                        break
+                    }
+                } else if (done === claim.outReq) {
+                    claim.outBusy = false
+                }
+            }
+        } finally {
+            finishReader(claims)
+        }
+        if (running) {
+            running = false
+            onClosed()
+        }
+    }
+
+    private fun finishReader(claims: List<Claim>) {
+        for (c in claims) {
+            runCatching { c.inReq?.cancel(); c.inReq?.close() }
+            runCatching { c.outReq?.cancel(); c.outReq?.close() }
+            c.inReq = null
+            c.outReq = null
+        }
+    }
+
+    /**
+     * Replay one raw report from the host on the device: kind 0 = output report (Steam's `0x80`
+     * rumble & friends — the active interface's interrupt-OUT, else a `SET_REPORT(Output)`
+     * control transfer), kind 1 = feature report (`SET_REPORT(Feature)`). [data] is the full
+     * report, id byte first, exactly as hidapi framed it host-side.
+     */
+    fun writeRaw(kind: Int, data: ByteArray) {
+        if (data.isEmpty()) return
+        when (kind) {
+            0 -> {
+                if ((activeClaim ?: claims.firstOrNull())?.outReq != null) {
+                    // Interrupt-OUT rides UsbRequests submitted by the reader thread. Bounded,
+                    // newest-wins: these are level-styled commands the host re-sends anyway.
+                    while (outQueue.size >= 32) outQueue.poll()
+                    outQueue.offer(data)
+                } else {
+                    setReport(REPORT_TYPE_OUTPUT, data)
+                }
+            }
+            1 -> setReport(REPORT_TYPE_FEATURE, data)
+        }
+    }
+
+    private fun setReport(type: Int, data: ByteArray) {
+        val conn = connection ?: return
+        val ifId = (activeClaim ?: claims.firstOrNull())?.iface?.id ?: return
+        sendReport(conn, ifId, type, data)
+    }
+
+    private fun configureInputMode(conn: UsbDeviceConnection, ifaceId: Int) {
+        sendFeature(conn, ifaceId, Sc2Device.DISABLE_LIZARD)
+        sendFeature(conn, ifaceId, Sc2Device.NORMALIZE_JOYSTICKS)
+    }
+
+    private fun sendFeature(conn: UsbDeviceConnection, ifaceId: Int, data: ByteArray) {
+        sendReport(conn, ifaceId, REPORT_TYPE_FEATURE, data)
+    }
+
+    /**
+     * HID `SET_REPORT` control transfer with hidapi's report-id framing: a non-zero leading byte
+     * is the report id (sent in wValue AND kept in the payload); a zero leading byte means
+     * "unnumbered" (id 0 in wValue, id byte stripped from the payload). EP0 is independent of
+     * the interrupt endpoints, so this is safe alongside the reader thread's requestWait.
+     */
+    private fun sendReport(conn: UsbDeviceConnection, ifaceId: Int, type: Int, data: ByteArray) {
+        val id = data[0].toInt() and 0xFF
+        val payload = if (id == 0) data.copyOfRange(1, data.size) else data
+        conn.controlTransfer(
+            0x21, // host→device, class, interface
+            0x09, // SET_REPORT
+            (type shl 8) or id,
+            ifaceId,
+            payload,
+            payload.size,
+            WRITE_TIMEOUT_MS,
+        )
+    }
+
+    /** Stop the read loop and release the interfaces. Idempotent; does not fire [onClosed]. */
+    fun stop() {
+        running = false
+        detachReceiver?.let { runCatching { context.unregisterReceiver(it) } }
+        detachReceiver = null
+        runCatching { reader?.join(1000) }
+        reader = null
+        outQueue.clear()
+        activeClaim = null
+        for (c in claims) runCatching { connection?.releaseInterface(c.iface) }
+        claims = emptyList()
+        runCatching { connection?.close() }
+        connection = null
+        device = null
+    }
+
+    private companion object {
+        const val TAG = "Sc2UsbLink"
+        const val READ_TIMEOUT_MS = 100L
+        const val WRITE_TIMEOUT_MS = 250
+        /** Hard `requestWait` ERRORS (not timeouts) persisting this long = the fd is dead. */
+        const val ERROR_UNPLUG_MS = 2000L
+        const val REPORT_TYPE_OUTPUT = 0x02
+        const val REPORT_TYPE_FEATURE = 0x03
+    }
+}
@@ -161,7 +161,7 @@ fn run_sync(
        return;
    }
    log::info!(
-        "decode: HEVC decoder started at {}x{}",
+        "decode: {mime} decoder started at {}x{}",
        mode.width,
        mode.height
    );
@@ -229,9 +229,11 @@ fn run_sync(
    // reclaimed after the codec is dropped below.
    let tracker = DisplayTracker::new(stats.clone(), clock_offset.clone());
    let render_cb = install_render_callback(&codec, &tracker);
-    // HUD stage split: receipt timestamps keyed by the pts we queue into the codec, so the decoded
-    // point (output-buffer dequeue — MediaCodec round-trips presentationTimeUs) can be paired back
-    // to its receipt for the `decode` stage. Only fed while the HUD is visible.
+    // Receipt timestamps keyed by the pts we queue into the codec, so the decoded point (output-
+    // buffer dequeue — MediaCodec round-trips presentationTimeUs) can be paired back to its receipt
+    // for the `decode` stage. Fed while the HUD is visible OR the adaptive-bitrate controller wants
+    // the decode signal (`measure_decode`) — the decoder-backlog bottleneck the network can't see.
+    let measure_decode = client.wants_decode_latency();
    let mut in_flight: VecDeque<(u64, i128)> = VecDeque::new();
    // Phase-2 host/network split (design/stats-unification.md): received AUs awaiting their 0xCF
    // host timing, as (pts_ns, capture→received µs). The timings are drained non-blockingly right
@@ -272,40 +274,45 @@ fn run_sync(
                            &p[..p.len().min(6)]
                        );
                    }
-                    // HUD stat, `received` point: host+network = client_now + (host−client) −
-                    // capture_pts. Gated on the HUD being visible — `enabled` first so the hidden
-                    // steady state skips the wall-clock read and the lock entirely. The receipt
-                    // stamp is also parked in `in_flight` (keyed by the pts the codec will echo on
-                    // the output buffer) for the decoded-point pairing in `drain`.
-                    if stats.enabled() {
+                    // Receipt stamp for the `decode` stage pairing, parked in `in_flight` (keyed by
+                    // the pts the codec echoes on its output buffer) whenever it's needed: the HUD
+                    // being visible, or the ABR decode signal (`measure_decode`). The HUD-only
+                    // samplers (`received` point, host/network split) stay gated on the overlay so
+                    // the hidden steady state adds only a wall-clock read + the receipt push.
+                    if stats.enabled() || measure_decode {
                        let received_ns = now_realtime_ns();
-                        let clock_offset = clock_offset.load(Ordering::Relaxed);
-                        let lat_ns = received_ns + clock_offset as i128 - frame.pts_ns as i128;
-                        let lat_us = (lat_ns > 0 && lat_ns < 10_000_000_000)
-                            .then_some((lat_ns / 1000) as u64);
-                        stats.note_received(frame.data.len(), lat_us, clock_offset != 0);
                        in_flight.push_back((frame.pts_ns / 1000, received_ns));
                        if in_flight.len() > IN_FLIGHT_CAP {
                            in_flight.pop_front(); // stale — codec never echoed it back
                        }
-                        // Phase-2 split: park this AU's capture→received sample, then match any
-                        // 0xCF host timings that have arrived — host = the host's own
-                        // capture→sent, network = our capture→received minus it (per-frame
-                        // tiling; saturating in case of clock jitter).
-                        if let Some(hostnet_us) = lat_us {
-                            pending_split.push_back((frame.pts_ns, hostnet_us));
-                            if pending_split.len() > PENDING_SPLIT_CAP {
-                                pending_split.pop_front(); // 0xCF lost / old host — evict
+                        // HUD stat, `received` point: host+network = client_now + (host−client) −
+                        // capture_pts.
+                        if stats.enabled() {
+                            let clock_offset = clock_offset.load(Ordering::Relaxed);
+                            let lat_ns = received_ns + clock_offset as i128 - frame.pts_ns as i128;
+                            let lat_us = (lat_ns > 0 && lat_ns < 10_000_000_000)
+                                .then_some((lat_ns / 1000) as u64);
+                            stats.note_received(frame.data.len(), lat_us, clock_offset != 0);
+                            // Phase-2 split: park this AU's capture→received sample, then match any
+                            // 0xCF host timings that have arrived — host = the host's own
+                            // capture→sent, network = our capture→received minus it (per-frame
+                            // tiling; saturating in case of clock jitter).
+                            if let Some(hostnet_us) = lat_us {
+                                pending_split.push_back((frame.pts_ns, hostnet_us));
+                                if pending_split.len() > PENDING_SPLIT_CAP {
+                                    pending_split.pop_front(); // 0xCF lost / old host — evict
+                                }
                            }
-                        }
-                        while let Ok(t) = client.next_host_timing(Duration::ZERO) {
-                            if let Some(i) = pending_split.iter().position(|&(p, _)| p == t.pts_ns)
-                            {
-                                let (_, hostnet_us) = pending_split.remove(i).unwrap();
-                                stats.note_host_split(
-                                    t.host_us as u64,
-                                    hostnet_us.saturating_sub(t.host_us as u64),
-                                );
+                            while let Ok(t) = client.next_host_timing(Duration::ZERO) {
+                                if let Some(i) =
+                                    pending_split.iter().position(|&(p, _)| p == t.pts_ns)
+                                {
+                                    let (_, hostnet_us) = pending_split.remove(i).unwrap();
+                                    stats.note_host_split(
+                                        t.host_us as u64,
+                                        hostnet_us.saturating_sub(t.host_us as u64),
+                                    );
+                                }
                            }
                        }
                    }
@@ -345,6 +352,8 @@ fn run_sync(
        };
        let (r, d) = drain(
            &codec,
+            &client,
+            measure_decode,
            &window,
            &mut applied_ds,
            wait,
@@ -608,6 +617,19 @@ pub(crate) fn codec_mime(codec: u8) -> &'static str {
    }
 }

+/// A short human label for the codec the host resolved, for the stats HUD's video-feed line
+/// (`"H.264"` / `"HEVC"` / `"AV1"` / `"PyroWave"`). Mirrors [`codec_mime`]'s fallback: anything
+/// not H.264/AV1/PyroWave is reported as HEVC (every pre-negotiation host emitted HEVC). Kept
+/// beside [`codec_mime`] because the MIME collapses PyroWave onto `video/hevc` and so can't name it.
+pub(crate) fn codec_label(codec: u8) -> &'static str {
+    match codec {
+        punktfunk_core::quic::CODEC_H264 => "H.264",
+        punktfunk_core::quic::CODEC_AV1 => "AV1",
+        punktfunk_core::quic::CODEC_PYROWAVE => "PyroWave",
+        _ => "HEVC",
+    }
+}
+
 /// Create the decoder: prefer the specific codec Kotlin ranked from `MediaCodecList`
 /// (`from_codec_name`), falling back to the platform's default decoder for the MIME
 /// (`from_decoder_type`) if that name can't be created (codec busy / renamed across an OS update).
@@ -806,7 +828,11 @@ fn run_async(
            })),
            on_error: Some(Box::new(move |e, code, _detail| {
                let fatal = !code.is_recoverable() && !code.is_transient();
-                log::warn!("decode: codec error {e:?} (fatal={fatal})");
+                if fatal {
+                    log::error!("decode: fatal codec error — stream will stop: {e:?}");
+                } else {
+                    log::warn!("decode: codec error {e:?} (recoverable)");
+                }
                let _ = err_tx.send(DecodeEvent::Error { fatal });
            })),
        };
@@ -866,6 +892,9 @@ fn run_async(
    // output back to them. Behind a `Mutex` since two threads touch it — only ever locked while the
    // HUD is visible.
    let clock_offset = client.clock_offset_shared();
+    // Whether the adaptive-bitrate controller wants the `decode` stage as its decoder-backlog
+    // signal (Automatic, non-PyroWave): then `in_flight` is fed regardless of the HUD.
+    let measure_decode = client.wants_decode_latency();
    let in_flight = Arc::new(Mutex::new(VecDeque::<(u64, i128)>::new()));
    // Display stage (spec `display` + the capture→displayed headline): the rendered frame is
    // parked in the tracker at release; the OnFrameRendered callback pairs it with
@@ -886,7 +915,15 @@ fn run_async(
        std::thread::Builder::new()
            .name("pf-decode-feed".into())
            .spawn(move || {
-                feeder_loop(client, stats, in_flight, clock_offset, shutdown, ev_tx);
+                feeder_loop(
+                    client,
+                    stats,
+                    measure_decode,
+                    in_flight,
+                    clock_offset,
+                    shutdown,
+                    ev_tx,
+                );
            })
            .ok()
    };
@@ -976,6 +1013,8 @@ fn run_async(
        let had_output = !ready.is_empty();
        present_ready(
            &codec,
+            &client,
+            measure_decode,
            &mut ready,
            &stats,
            &in_flight,
@@ -1052,6 +1091,7 @@ fn run_async(
 fn feeder_loop(
    client: Arc<NativeClient>,
    stats: Arc<crate::stats::VideoStats>,
+    measure_decode: bool,
    in_flight: Arc<Mutex<VecDeque<(u64, i128)>>>,
    clock_offset: Arc<AtomicI64>,
    shutdown: Arc<AtomicBool>,
@@ -1067,13 +1107,11 @@ fn feeder_loop(
                // instead of a full IDR (the frames_dropped keyframe path is the backstop). The gap
                // verdict rides the Au event so the decode loop arms its freeze gate on the same signal.
                let gap = client.note_frame_index(frame.frame_index);
-                if stats.enabled() {
+                // Park the receipt stamp (keyed by the pts the codec echoes) whenever the `decode`
+                // stage is consumed: the HUD, or the ABR decode signal (`measure_decode`). The
+                // HUD-only `received` point + host/network split stay gated on the overlay.
+                if stats.enabled() || measure_decode {
                    let received_ns = now_realtime_ns();
-                    let clock_offset = clock_offset.load(Ordering::Relaxed) as i128;
-                    let lat_ns = received_ns + clock_offset - frame.pts_ns as i128;
-                    let lat_us =
-                        (lat_ns > 0 && lat_ns < 10_000_000_000).then_some((lat_ns / 1000) as u64);
-                    stats.note_received(frame.data.len(), lat_us, clock_offset != 0);
                    {
                        let mut g = in_flight
                            .lock()
@@ -1083,19 +1121,27 @@ fn feeder_loop(
                            g.pop_front(); // stale — codec never echoed it back
                        }
                    }
-                    if let Some(hostnet_us) = lat_us {
-                        pending_split.push_back((frame.pts_ns, hostnet_us));
-                        if pending_split.len() > PENDING_SPLIT_CAP {
-                            pending_split.pop_front();
+                    if stats.enabled() {
+                        let clock_offset = clock_offset.load(Ordering::Relaxed) as i128;
+                        let lat_ns = received_ns + clock_offset - frame.pts_ns as i128;
+                        let lat_us = (lat_ns > 0 && lat_ns < 10_000_000_000)
+                            .then_some((lat_ns / 1000) as u64);
+                        stats.note_received(frame.data.len(), lat_us, clock_offset != 0);
+                        if let Some(hostnet_us) = lat_us {
+                            pending_split.push_back((frame.pts_ns, hostnet_us));
+                            if pending_split.len() > PENDING_SPLIT_CAP {
+                                pending_split.pop_front();
+                            }
                        }
-                    }
-                    while let Ok(t) = client.next_host_timing(Duration::ZERO) {
-                        if let Some(i) = pending_split.iter().position(|&(p, _)| p == t.pts_ns) {
-                            let (_, hostnet_us) = pending_split.remove(i).unwrap();
-                            stats.note_host_split(
-                                t.host_us as u64,
-                                hostnet_us.saturating_sub(t.host_us as u64),
-                            );
+                        while let Ok(t) = client.next_host_timing(Duration::ZERO) {
+                            if let Some(i) = pending_split.iter().position(|&(p, _)| p == t.pts_ns)
+                            {
+                                let (_, hostnet_us) = pending_split.remove(i).unwrap();
+                                stats.note_host_split(
+                                    t.host_us as u64,
+                                    hostnet_us.saturating_sub(t.host_us as u64),
+                                );
+                            }
                        }
                    }
                }
@@ -1221,6 +1267,8 @@ fn feed_ready(
 #[allow(clippy::too_many_arguments)] // one call site; mirrors the sync loop's drain
 fn present_ready(
    codec: &MediaCodec,
+    client: &NativeClient,
+    measure_decode: bool,
    ready: &mut Vec<OutputReady>,
    stats: &crate::stats::VideoStats,
    in_flight: &Mutex<VecDeque<(u64, i128)>>,
@@ -1234,12 +1282,22 @@ fn present_ready(
    if ready.is_empty() {
        return;
    }
-    if stats.enabled() {
+    // Pair each output's decode stage (feeds the ABR decode signal always; the HUD histogram only
+    // while visible) — both consume the receipt map, so enter for either.
+    if stats.enabled() || measure_decode {
        let mut g = in_flight
            .lock()
            .unwrap_or_else(std::sync::PoisonError::into_inner);
        for o in ready.iter() {
-            note_decoded_pts(stats, &mut g, clock_offset, o.pts_us, o.decoded_ns);
+            note_decoded_pts(
+                client,
+                measure_decode,
+                stats,
+                &mut g,
+                clock_offset,
+                o.pts_us,
+                o.decoded_ns,
+            );
        }
    }
    // Fold EVERY output through the gate in pts (== decode) order — even the ones newest-wins discards —
@@ -1460,6 +1518,8 @@ fn feed(
 #[allow(clippy::too_many_arguments)] // one call site; mirrors the async loop's present_ready
 fn drain(
    codec: &MediaCodec,
+    client: &NativeClient,
+    measure_decode: bool,
    window: &NativeWindow,
    applied_ds: &mut Option<DataSpace>,
    first_wait: Duration,
@@ -1489,11 +1549,20 @@ fn drain(
                let flags = take_flags(recovery_flags, pts_us);
                held_present =
                    gate.on_decoded(flags, false, Instant::now()) == GateVerdict::Present;
-                let meta = if stats.enabled() {
+                let meta = if stats.enabled() || measure_decode {
                    // The dequeue IS the sync loop's decoded-availability instant.
                    let decoded_ns = now_realtime_ns();
-                    note_decoded_pts(stats, in_flight, clock_offset, pts_us, decoded_ns);
-                    Some((pts_us, decoded_ns))
+                    note_decoded_pts(
+                        client,
+                        measure_decode,
+                        stats,
+                        in_flight,
+                        clock_offset,
+                        pts_us,
+                        decoded_ns,
+                    );
+                    // The tracker's `display` stage is a HUD concern — park only when visible.
+                    stats.enabled().then_some((pts_us, decoded_ns))
                } else {
                    None
                };
@@ -1564,6 +1633,8 @@ fn drain(
 /// `decoded_ns` is the availability instant: the dequeue (sync loop) or the output callback's
 /// stamp (async loop).
 fn note_decoded_pts(
+    client: &NativeClient,
+    measure_decode: bool,
    stats: &crate::stats::VideoStats,
    in_flight: &mut VecDeque<(u64, i128)>,
    clock_offset: i64,
@@ -1582,12 +1653,25 @@ fn note_decoded_pts(
            break;
        }
    }
-    // pts_us is the truncated frame.pts_ns/1000 we queued, so ×1000 re-approximates capture time
-    // to < 1 µs — negligible against the ms-scale figures shown.
-    let e2e_ns = decoded_ns + clock_offset as i128 - pts_us as i128 * 1000;
-    let e2e_us = (e2e_ns > 0 && e2e_ns < 10_000_000_000).then_some((e2e_ns / 1000) as u64);
    let decode_us = received_ns.map(|r| ((decoded_ns - r).max(0) / 1000) as u64);
-    stats.note_decoded(e2e_us, decode_us);
+    // Adaptive bitrate: the `decode` stage (received→decoded, single-clock local) IS the decoder-
+    // backlog signal — the only bottleneck the host-side network signals can't see (a fast LAN
+    // feeding a slower mobile decoder). Report it whenever the controller is armed, regardless of
+    // the HUD; `report_decode_us` is a cheap accumulate the pump windows.
+    if measure_decode {
+        if let Some(us) = decode_us {
+            client.report_decode_us(us.min(u32::MAX as u64) as u32);
+        }
+    }
+    // HUD histogram: only while the overlay is visible (a measure-only caller enters here for the
+    // ABR report alone). `end-to-end` = capture→decoded (skew-corrected) tiles the `decode` stage.
+    // pts_us is the truncated frame.pts_ns/1000 we queued, so ×1000 re-approximates capture time to
+    // < 1 µs — negligible against the ms-scale figures shown.
+    if stats.enabled() {
+        let e2e_ns = decoded_ns + clock_offset as i128 - pts_us as i128 * 1000;
+        let e2e_us = (e2e_ns > 0 && e2e_ns < 10_000_000_000).then_some((e2e_ns / 1000) as u64);
+        stats.note_decoded(e2e_us, decode_us);
+    }
 }

 /// The AU `user_flags` for a decoded output, keyed by the echoed `presentationTimeUs`. Recovery
@@ -22,6 +22,7 @@ const PULL_TIMEOUT: Duration = Duration::from_millis(100);
 const TAG_LED: u8 = 0x01;
 const TAG_PLAYER_LEDS: u8 = 0x02;
 const TAG_TRIGGER: u8 = 0x03;
+const TAG_HID_RAW: u8 = 0x05;

 /// `NativeBridge.nativeNextRumble(handle): Long` — block up to ~100 ms for the next rumble update.
 /// Returns a packed positive long: bits 49..52 = wire `pad` index (0..15), bit 48 = "has a v2 lease",
@@ -143,6 +144,20 @@ pub extern "system" fn Java_io_unom_punktfunk_kit_NativeBridge_nativeNextHidout(
                // rumble already rides the universal 0xCA plane).
                return -1;
            }
+            HidOutput::HidRaw { pad, kind, data } => {
+                // As-is SC2 passthrough: the host's hidraw consumer (Steam) wrote this report to
+                // the virtual pad; Kotlin replays it verbatim on the physical controller.
+                // `[pad][0x05][kind][report…]` — kind 0 = output report, 1 = feature report.
+                let n = 3 + data.len();
+                if cap < n {
+                    return -1; // reports are ≤ 64 bytes; Kotlin allocates 128
+                }
+                out[0] = pad;
+                out[1] = TAG_HID_RAW;
+                out[2] = kind;
+                out[3..n].copy_from_slice(&data);
+                n
+            }
        };
        n as jint
    })
@@ -11,6 +11,43 @@ use std::time::Duration;

 use super::{hex32, jni_guard, parse_hex32, SessionHandle};

+/// Machine token of the most recent `nativeConnect`/`nativePair` failure, taken (and cleared)
+/// by `nativeTakeLastError` so Kotlin can render a cause-specific message instead of the old
+/// catch-all "wrong PIN, or the host isn't armed" (which blamed the PIN for dead network paths
+/// — the moko0878-class support threads). The app runs one attempt at a time, so one slot
+/// suffices; a stale token is harmless (it is taken immediately after the failed call).
+static LAST_ERROR: Mutex<String> = Mutex::new(String::new());
+
+/// Stable token for a failed pair/connect cause, matched by Kotlin (`ConnectErrors.kt`):
+/// a typed host rejection yields its `RejectReason::as_str()` token ("not-armed", "denied",
+/// "approval-timeout", …); transport-level causes map to "crypto" / "timeout" / "io" / "error".
+fn note_error(e: &punktfunk_core::error::PunktfunkError) {
+    use punktfunk_core::error::PunktfunkError as E;
+    let token = match e {
+        E::Rejected(r) => r.as_str(),
+        E::Crypto => "crypto",
+        E::Timeout => "timeout",
+        E::Io(_) => "io",
+        _ => "error",
+    };
+    *LAST_ERROR.lock().unwrap() = token.to_string();
+}
+
+/// `NativeBridge.nativeTakeLastError(): String` — the machine token of the most recent failed
+/// `nativeConnect`/`nativePair`, cleared on read (`""` when none). Call right after a `0`
+/// handle / `""` fingerprint.
+#[no_mangle]
+pub extern "system" fn Java_io_unom_punktfunk_kit_NativeBridge_nativeTakeLastError<'local>(
+    env: JNIEnv<'local>,
+    _this: JObject<'local>,
+) -> jni::sys::jstring {
+    let token = std::mem::take(&mut *LAST_ERROR.lock().unwrap());
+    match env.new_string(token) {
+        Ok(s) => s.into_raw(),
+        Err(_) => JObject::null().into_raw(),
+    }
+}
+
 /// `NativeBridge.nativeGenerateIdentity(): String` — mint a fresh persistent self-signed identity.
 /// Returns `"<certPem>\n-----PUNKTFUNK-KEY-----\n<keyPem>"`, or `""` on failure (logged). Kotlin
 /// persists it (Keystore-wrapped) and only calls this again when the store is genuinely empty.
@@ -185,6 +222,7 @@ pub extern "system" fn Java_io_unom_punktfunk_kit_NativeBridge_nativeConnect<'lo
        }
        Err(e) => {
            log::error!("nativeConnect to {host}:{port} failed: {e}");
+            note_error(&e);
            0
        }
    }
@@ -318,7 +356,9 @@ pub extern "system" fn Java_io_unom_punktfunk_kit_NativeBridge_nativePair<'local
            Ok(host_fp) => hex32(&host_fp),
            Err(e) => {
                // Crypto error == wrong PIN / MITM; anything else == transport/host reject.
+                // The token lets Kotlin say WHICH (`nativeTakeLastError`).
                log::error!("nativePair to {host}:{port} failed: {e}");
+                note_error(&e);
                String::new()
            }
        }
@@ -6,10 +6,11 @@
 //! conventions: buttons 1=left/2=middle/3=right/4=X1/5=X2; scroll axis 0=vertical/1=horizontal,
 //! signed 120-unit delta, +=up/right; keys are Windows VK (mapped from KEYCODE_* on the Kotlin side).

-use jni::objects::JObject;
+use jni::objects::{JByteBuffer, JObject};
 use jni::sys::{jboolean, jint, jlong};
 use jni::JNIEnv;
 use punktfunk_core::input::{InputEvent, InputKind};
+use punktfunk_core::quic::{RichInput, HID_REPORT_MAX};

 use super::SessionHandle;

@@ -236,3 +237,43 @@ pub extern "system" fn Java_io_unom_punktfunk_kit_NativeBridge_nativeSendGamepad
 ) {
    send_event(handle, InputKind::GamepadRemove, 0, 0, 0, pad as u32);
 }
+
+/// `NativeBridge.nativeSendPadHidReport(handle, pad, buf, len)` — one raw HID input report from a
+/// client-captured controller (the as-is Steam Controller 2 passthrough), forwarded verbatim on
+/// the rich-input plane (`RichInput::HidReport`, 0xCC). `buf` is a DIRECT ByteBuffer whose first
+/// `len` bytes are the report, id byte first (`0x42`/`0x45`/`0x47` state, `0x43` battery, …);
+/// `len` is clamped to the 64-byte wire body. Called from the capture thread at the controller's
+/// own report rate (~250–500 Hz) — the direct-buffer read avoids a JNI array copy per report.
+#[no_mangle]
+pub extern "system" fn Java_io_unom_punktfunk_kit_NativeBridge_nativeSendPadHidReport(
+    env: JNIEnv,
+    _this: JObject,
+    handle: jlong,
+    pad: jint,
+    buf: JByteBuffer,
+    len: jint,
+) {
+    if handle == 0 || len <= 0 {
+        return;
+    }
+    let cap = match env.get_direct_buffer_capacity(&buf) {
+        Ok(c) => c,
+        Err(_) => return,
+    };
+    let ptr = match env.get_direct_buffer_address(&buf) {
+        Ok(p) if !p.is_null() => p,
+        _ => return,
+    };
+    let n = (len as usize).min(cap).min(HID_REPORT_MAX);
+    let mut data = [0u8; HID_REPORT_MAX];
+    // SAFETY: `ptr`/`cap` describe the direct ByteBuffer's backing store, valid for this call;
+    // `n` is bounded by both the buffer capacity and the fixed wire body.
+    data[..n].copy_from_slice(unsafe { std::slice::from_raw_parts(ptr, n) });
+    // SAFETY: live handle per the nativeConnect/nativeClose contract; send_rich_input is &self.
+    let h = unsafe { &*(handle as *const SessionHandle) };
+    let _ = h.client.send_rich_input(RichInput::HidReport {
+        pad: (pad as u32 & 0xF) as u8,
+        len: n as u8,
+        data,
+    });
+}
@@ -102,6 +102,31 @@ pub extern "system" fn Java_io_unom_punktfunk_kit_NativeBridge_nativeVideoMime<'
    })
 }

+/// `NativeBridge.nativeVideoCodecLabel(handle): String` — a short human label for the codec the
+/// host resolved (`"H.264"` / `"HEVC"` / `"AV1"` / `"PyroWave"`), for the stats HUD's video-feed
+/// line. Distinct from [`Java_io_unom_punktfunk_kit_NativeBridge_nativeVideoMime`] because the MIME
+/// collapses PyroWave onto `video/hevc` and can't name it. Empty string on a `0` handle. Cheap;
+/// safe on the UI thread. Android-gated (reads `crate::decode`), matching `nativeVideoMime`.
+#[cfg(target_os = "android")]
+#[no_mangle]
+pub extern "system" fn Java_io_unom_punktfunk_kit_NativeBridge_nativeVideoCodecLabel<'local>(
+    env: JNIEnv<'local>,
+    _this: JObject<'local>,
+    handle: jlong,
+) -> jstring {
+    jni_guard(std::ptr::null_mut(), || {
+        if handle == 0 {
+            return std::ptr::null_mut();
+        }
+        // SAFETY: live handle per the nativeConnect/nativeClose contract.
+        let h = unsafe { &*(handle as *const SessionHandle) };
+        match env.new_string(crate::decode::codec_label(h.client.codec)) {
+            Ok(s) => s.into_raw(),
+            Err(_) => std::ptr::null_mut(),
+        }
+    })
+}
+
 /// `NativeBridge.nativeVideoDecoderLabel(handle): String` — the resolved decoder identity for the
 /// HUD, e.g. `c2.qti.avc.decoder · low-latency`, or `""` before the decode thread has resolved one.
 /// One-shot (the decoder is fixed for the session); poll once after the HUD appears. Not
@@ -19,5 +19,32 @@
 	<array>
 		<string>_punktfunk._udp</string>
 	</array>
+	<!-- Background keep-alive (opt-in, iOS/iPadOS): the ONLY sanctioned way to keep the long-lived
+	     QUIC socket + pump-thread set alive while backgrounded is the audio background mode, backed
+	     by the session's real, audible remote audio (AVAudioEngine keeps rendering). Video decode is
+	     dropped; a bounded timer auto-disconnects. Never silence-as-keepalive (App Review 2.5.4).
+	     tvOS ignores/tolerates the key; macOS is not gated by it. -->
+	<key>UIBackgroundModes</key>
+	<array>
+		<string>audio</string>
+	</array>
+	<!-- Live Activities (iOS/iPadOS): the Lock-Screen / Dynamic-Island session surface. Updated
+	     locally (pushType nil) from the alive app process — no aps-environment. tvOS/macOS ignore it. -->
+	<key>NSSupportsLiveActivities</key>
+	<true/>
+	<!-- Deep links: punktfunk://connect/<host-uuid>[?launch=<GameEntry.id>]. Emitted by the
+	     launcher widget and Siri/Shortcuts; routed by ContentView.onOpenURL into the existing
+	     connect path. Shared across all three targets (tvOS/macOS accept it harmlessly). -->
+	<key>CFBundleURLTypes</key>
+	<array>
+		<dict>
+			<key>CFBundleURLName</key>
+			<string>io.unom.punktfunk.deeplink</string>
+			<key>CFBundleURLSchemes</key>
+			<array>
+				<string>punktfunk</string>
+			</array>
+		</dict>
+	</array>
 </dict>
 </plist>
@@ -73,5 +73,15 @@
 	<array>
 		<string>$(AppIdentifierPrefix)io.unom.punktfunk</string>
 	</array>
+
+	<!-- App Group: same shared UserDefaults suite as iOS (Config/Punktfunk.entitlements). Shared
+	     here so a single HostStore code path (UserDefaults(suiteName:)) works on every platform;
+	     macOS widgets that read it arrive with M5. macOS App Groups use the plain group id under
+	     the App Store profile; a Developer-ID-signed build wants the team-prefixed form — the
+	     Dev-ID codesign step in release.yml must verify this value against the Dev-ID profile. -->
+	<key>com.apple.security.application-groups</key>
+	<array>
+		<string>group.io.unom.punktfunk</string>
+	</array>
 </dict>
 </plist>
@@ -20,5 +20,14 @@
 	     is true on iOS/tvOS too. -->
 	<key>com.apple.developer.networking.multicast</key>
 	<true/>
+	<!-- App Group: the shared UserDefaults suite (group.io.unom.punktfunk) that both the app and
+	     the Widget/Live-Activity extension read — the saved-host store moved there so a launcher
+	     widget can see it (HostStore reads UserDefaults(suiteName:)). Must be registered on the
+	     developer portal and enabled in the provisioning profile for BOTH app ids
+	     (io.unom.punktfunk + io.unom.punktfunk.widgets). tvOS carries the key harmlessly. -->
+	<key>com.apple.security.application-groups</key>
+	<array>
+		<string>group.io.unom.punktfunk</string>
+	</array>
 </dict>
 </plist>
@@ -9,13 +9,20 @@ let package = Package(
    platforms: [.macOS(.v14), .iOS(.v17), .tvOS(.v17)],
    products: [
        .library(name: "PunktfunkKit", targets: ["PunktfunkKit"]),
+        // Dependency-free foundation (stored-host model + JSON codec, settings keys, App-Group
+        // constant, deep-link grammar, Live Activity attributes). A separate PRODUCT so the widget
+        // extension — which must never link PunktfunkKit (Rust staticlib + presentation layer) —
+        // can link this and nothing else. PunktfunkKit re-exports it (see SharedReexport.swift).
+        .library(name: "PunktfunkShared", targets: ["PunktfunkShared"]),
        .executable(name: "PunktfunkClient", targets: ["PunktfunkClient"]),
    ],
    targets: [
        .binaryTarget(name: "PunktfunkCore", path: "PunktfunkCore.xcframework"),
+        // No dependencies by design — an extension process links this alone.
+        .target(name: "PunktfunkShared"),
        .target(
            name: "PunktfunkKit",
-            dependencies: ["PunktfunkCore"],
+            dependencies: ["PunktfunkCore", "PunktfunkShared"],
            // OSS attribution shown by the app's Acknowledgements screen. Bundled here (not in the
            // app target) so it rides along via Bundle.module in both `swift build` and the Xcode
            // app, which links the PunktfunkKit product. Refresh with
@@ -42,6 +49,14 @@ let package = Package(
        .executableTarget(name: "PunktfunkClient", dependencies: ["PunktfunkKit"]),
        // PunktfunkCore is a direct dep too so the wire tests can name the C ABI's
        // `PunktfunkInputEvent` / `PUNKTFUNK_INPUT_KIND_*` when asserting the gamepad byte layout.
-        .testTarget(name: "PunktfunkKitTests", dependencies: ["PunktfunkKit", "PunktfunkCore"]),
+        .testTarget(
+            name: "PunktfunkKitTests",
+            dependencies: ["PunktfunkKit", "PunktfunkShared", "PunktfunkCore"],
+            resources: [
+                // PyroWave golden fixtures: host-encoded AUs + upstream-decoded reference
+                // planes (regenerate with punktfunk-host's `pyrowave_dump_golden` on a
+                // Vulkan box — see PyroWaveDecoderTests.swift).
+                .copy("PyroWaveFixtures")
+            ]),
    ]
 )
@@ -11,14 +11,56 @@
 		BB0000000000000000000005 /* PunktfunkKit in Frameworks */ = {isa = PBXBuildFile; productRef = BB0000000000000000000006 /* PunktfunkKit */; };
 		CC0000000000000000000005 /* PunktfunkKit in Frameworks */ = {isa = PBXBuildFile; productRef = CC0000000000000000000006 /* PunktfunkKit */; };
 		DD0000000000000000000003 /* SwiftUINavigationTransitions in Frameworks */ = {isa = PBXBuildFile; productRef = DD0000000000000000000002 /* SwiftUINavigationTransitions */; };
+		E295569A300948B9009F939C /* WidgetKit.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = E2955699300948B9009F939C /* WidgetKit.framework */; };
+		E295569C300948B9009F939C /* SwiftUI.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = E295569B300948B9009F939C /* SwiftUI.framework */; };
+		E2CAFE000000000000000001 /* PunktfunkShared in Frameworks */ = {isa = PBXBuildFile; productRef = E2CAFE000000000000000002 /* PunktfunkShared */; };
+		E29556A9300948BA009F939C /* PunktfunkWidgetsExtension.appex in Embed Foundation Extensions */ = {isa = PBXBuildFile; fileRef = E2955697300948B9009F939C /* PunktfunkWidgetsExtension.appex */; settings = {ATTRIBUTES = (RemoveHeadersOnCopy, ); }; };
 /* End PBXBuildFile section */

+/* Begin PBXContainerItemProxy section */
+		E29556A7300948BA009F939C /* PBXContainerItemProxy */ = {
+			isa = PBXContainerItemProxy;
+			containerPortal = AA000000000000000000000D /* Project object */;
+			proxyType = 1;
+			remoteGlobalIDString = E2955696300948B9009F939C;
+			remoteInfo = PunktfunkWidgetsExtension;
+		};
+/* End PBXContainerItemProxy section */
+
+/* Begin PBXCopyFilesBuildPhase section */
+		E29556AA300948BA009F939C /* Embed Foundation Extensions */ = {
+			isa = PBXCopyFilesBuildPhase;
+			buildActionMask = 2147483647;
+			dstPath = "";
+			dstSubfolderSpec = 13;
+			files = (
+				E29556A9300948BA009F939C /* PunktfunkWidgetsExtension.appex in Embed Foundation Extensions */,
+			);
+			name = "Embed Foundation Extensions";
+			runOnlyForDeploymentPostprocessing = 0;
+		};
+/* End PBXCopyFilesBuildPhase section */
+
 /* Begin PBXFileReference section */
 		AA0000000000000000000001 /* Punktfunk.app */ = {isa = PBXFileReference; explicitFileType = wrapper.application; includeInIndex = 0; path = Punktfunk.app; sourceTree = BUILT_PRODUCTS_DIR; };
 		BB0000000000000000000001 /* Punktfunk-iOS.app */ = {isa = PBXFileReference; explicitFileType = wrapper.application; includeInIndex = 0; path = "Punktfunk-iOS.app"; sourceTree = BUILT_PRODUCTS_DIR; };
 		CC0000000000000000000001 /* Punktfunk-tvOS.app */ = {isa = PBXFileReference; explicitFileType = wrapper.application; includeInIndex = 0; path = "Punktfunk-tvOS.app"; sourceTree = BUILT_PRODUCTS_DIR; };
+		E2955697300948B9009F939C /* PunktfunkWidgetsExtension.appex */ = {isa = PBXFileReference; explicitFileType = "wrapper.app-extension"; includeInIndex = 0; path = PunktfunkWidgetsExtension.appex; sourceTree = BUILT_PRODUCTS_DIR; };
+		E2955699300948B9009F939C /* WidgetKit.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; name = WidgetKit.framework; path = System/Library/Frameworks/WidgetKit.framework; sourceTree = SDKROOT; };
+		E295569B300948B9009F939C /* SwiftUI.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; name = SwiftUI.framework; path = System/Library/Frameworks/SwiftUI.framework; sourceTree = SDKROOT; };
+		E295577B30094CE5009F939C /* PunktfunkWidgetsExtension.entitlements */ = {isa = PBXFileReference; lastKnownFileType = text.plist.entitlements; path = PunktfunkWidgetsExtension.entitlements; sourceTree = "<group>"; };
 /* End PBXFileReference section */

+/* Begin PBXFileSystemSynchronizedBuildFileExceptionSet section */
+		E29556AD300948BA009F939C /* Exceptions for "PunktfunkWidgets" folder in "PunktfunkWidgetsExtension" target */ = {
+			isa = PBXFileSystemSynchronizedBuildFileExceptionSet;
+			membershipExceptions = (
+				Info.plist,
+			);
+			target = E2955696300948B9009F939C /* PunktfunkWidgetsExtension */;
+		};
+/* End PBXFileSystemSynchronizedBuildFileExceptionSet section */
+
 /* Begin PBXFileSystemSynchronizedRootGroup section */
 		AA0000000000000000000002 /* App */ = {
 			isa = PBXFileSystemSynchronizedRootGroup;
@@ -30,6 +72,14 @@
 			path = Sources/PunktfunkClient;
 			sourceTree = "<group>";
 		};
+		E295569D300948B9009F939C /* PunktfunkWidgets */ = {
+			isa = PBXFileSystemSynchronizedRootGroup;
+			exceptions = (
+				E29556AD300948BA009F939C /* Exceptions for "PunktfunkWidgets" folder in "PunktfunkWidgetsExtension" target */,
+			);
+			path = PunktfunkWidgets;
+			sourceTree = "<group>";
+		};
 /* End PBXFileSystemSynchronizedRootGroup section */

 /* Begin PBXFrameworksBuildPhase section */
@@ -58,14 +108,27 @@
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
+		E2955694300948B9009F939C /* Frameworks */ = {
+			isa = PBXFrameworksBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+				E2CAFE000000000000000001 /* PunktfunkShared in Frameworks */,
+				E295569C300948B9009F939C /* SwiftUI.framework in Frameworks */,
+				E295569A300948B9009F939C /* WidgetKit.framework in Frameworks */,
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+		};
 /* End PBXFrameworksBuildPhase section */

 /* Begin PBXGroup section */
 		AA0000000000000000000007 = {
 			isa = PBXGroup;
 			children = (
+				E295577B30094CE5009F939C /* PunktfunkWidgetsExtension.entitlements */,
 				AA0000000000000000000002 /* App */,
 				AA0000000000000000000003 /* Sources/PunktfunkClient */,
+				E295569D300948B9009F939C /* PunktfunkWidgets */,
+				E2955698300948B9009F939C /* Frameworks */,
 				AA0000000000000000000008 /* Products */,
 			);
 			sourceTree = "<group>";
@@ -76,10 +139,20 @@
 				AA0000000000000000000001 /* Punktfunk.app */,
 				BB0000000000000000000001 /* Punktfunk-iOS.app */,
 				CC0000000000000000000001 /* Punktfunk-tvOS.app */,
+				E2955697300948B9009F939C /* PunktfunkWidgetsExtension.appex */,
 			);
 			name = Products;
 			sourceTree = "<group>";
 		};
+		E2955698300948B9009F939C /* Frameworks */ = {
+			isa = PBXGroup;
+			children = (
+				E2955699300948B9009F939C /* WidgetKit.framework */,
+				E295569B300948B9009F939C /* SwiftUI.framework */,
+			);
+			name = Frameworks;
+			sourceTree = "<group>";
+		};
 /* End PBXGroup section */

 /* Begin PBXNativeTarget section */
@@ -114,10 +187,12 @@
 				BB000000000000000000000B /* Sources */,
 				BB0000000000000000000004 /* Frameworks */,
 				BB000000000000000000000C /* Resources */,
+				E29556AA300948BA009F939C /* Embed Foundation Extensions */,
 			);
 			buildRules = (
 			);
 			dependencies = (
+				E29556A8300948BA009F939C /* PBXTargetDependency */,
 			);
 			fileSystemSynchronizedGroups = (
 				AA0000000000000000000002 /* App */,
@@ -156,6 +231,29 @@
 			productReference = CC0000000000000000000001 /* Punktfunk-tvOS.app */;
 			productType = "com.apple.product-type.application";
 		};
+		E2955696300948B9009F939C /* PunktfunkWidgetsExtension */ = {
+			isa = PBXNativeTarget;
+			buildConfigurationList = E29556AE300948BA009F939C /* Build configuration list for PBXNativeTarget "PunktfunkWidgetsExtension" */;
+			buildPhases = (
+				E2955693300948B9009F939C /* Sources */,
+				E2955694300948B9009F939C /* Frameworks */,
+				E2955695300948B9009F939C /* Resources */,
+			);
+			buildRules = (
+			);
+			dependencies = (
+			);
+			fileSystemSynchronizedGroups = (
+				E295569D300948B9009F939C /* PunktfunkWidgets */,
+			);
+			name = PunktfunkWidgetsExtension;
+			packageProductDependencies = (
+				E2CAFE000000000000000002 /* PunktfunkShared */,
+			);
+			productName = PunktfunkWidgetsExtension;
+			productReference = E2955697300948B9009F939C /* PunktfunkWidgetsExtension.appex */;
+			productType = "com.apple.product-type.app-extension";
+		};
 /* End PBXNativeTarget section */

 /* Begin PBXProject section */
@@ -163,11 +261,15 @@
 			isa = PBXProject;
 			attributes = {
 				BuildIndependentTargetsInParallel = 1;
+				LastSwiftUpdateCheck = 2700;
 				LastUpgradeCheck = 2700;
 				TargetAttributes = {
 					AA0000000000000000000009 = {
 						CreatedOnToolsVersion = 26.0;
 					};
+					E2955696300948B9009F939C = {
+						CreatedOnToolsVersion = 27.0;
+					};
 				};
 			};
 			buildConfigurationList = AA000000000000000000000E /* Build configuration list for PBXProject "Punktfunk" */;
@@ -190,6 +292,7 @@
 				AA0000000000000000000009 /* Punktfunk */,
 				BB0000000000000000000009 /* Punktfunk-iOS */,
 				CC0000000000000000000009 /* Punktfunk-tvOS */,
+				E2955696300948B9009F939C /* PunktfunkWidgetsExtension */,
 			);
 		};
 /* End PBXProject section */
@@ -216,6 +319,13 @@
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
+		E2955695300948B9009F939C /* Resources */ = {
+			isa = PBXResourcesBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+		};
 /* End PBXResourcesBuildPhase section */

 /* Begin PBXSourcesBuildPhase section */
@@ -240,8 +350,23 @@
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
+		E2955693300948B9009F939C /* Sources */ = {
+			isa = PBXSourcesBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+		};
 /* End PBXSourcesBuildPhase section */

+/* Begin PBXTargetDependency section */
+		E29556A8300948BA009F939C /* PBXTargetDependency */ = {
+			isa = PBXTargetDependency;
+			target = E2955696300948B9009F939C /* PunktfunkWidgetsExtension */;
+			targetProxy = E29556A7300948BA009F939C /* PBXContainerItemProxy */;
+		};
+/* End PBXTargetDependency section */
+
 /* Begin XCBuildConfiguration section */
 		AA0000000000000000000010 /* Debug */ = {
 			isa = XCBuildConfiguration;
@@ -436,7 +561,6 @@
 				INFOPLIST_KEY_CFBundleDisplayName = Punktfunk;
 				INFOPLIST_KEY_GCSupportsControllerUserInteraction = YES;
 				INFOPLIST_KEY_GCSupportsGameMode = YES;
-				INFOPLIST_KEY_ITSAppUsesNonExemptEncryption = NO;
 				INFOPLIST_KEY_LSApplicationCategoryType = "public.app-category.games";
 				INFOPLIST_KEY_NSLocalNetworkUsageDescription = "Punktfunk connects directly to your punktfunk host on the local network to stream video, audio, and input.";
 				INFOPLIST_KEY_NSMicrophoneUsageDescription = "Your microphone is streamed to the connected punktfunk host, where it appears as a virtual microphone.";
@@ -478,7 +602,6 @@
 				INFOPLIST_KEY_CFBundleDisplayName = Punktfunk;
 				INFOPLIST_KEY_GCSupportsControllerUserInteraction = YES;
 				INFOPLIST_KEY_GCSupportsGameMode = YES;
-				INFOPLIST_KEY_ITSAppUsesNonExemptEncryption = NO;
 				INFOPLIST_KEY_LSApplicationCategoryType = "public.app-category.games";
 				INFOPLIST_KEY_NSLocalNetworkUsageDescription = "Punktfunk connects directly to your punktfunk host on the local network to stream video, audio, and input.";
 				INFOPLIST_KEY_NSMicrophoneUsageDescription = "Your microphone is streamed to the connected punktfunk host, where it appears as a virtual microphone.";
@@ -566,6 +689,97 @@
 			};
 			name = Release;
 		};
+		E29556AB300948BA009F939C /* Debug */ = {
+			isa = XCBuildConfiguration;
+			buildSettings = {
+				ASSETCATALOG_COMPILER_GLOBAL_ACCENT_COLOR_NAME = AccentColor;
+				ASSETCATALOG_COMPILER_WIDGET_BACKGROUND_COLOR_NAME = WidgetBackground;
+				CLANG_ANALYZER_NUMBER_OBJECT_CONVERSION = YES_AGGRESSIVE;
+				CLANG_CXX_LANGUAGE_STANDARD = "gnu++20";
+				CLANG_ENABLE_OBJC_WEAK = YES;
+				CLANG_WARN_DIRECT_OBJC_ISA_USAGE = YES_ERROR;
+				CLANG_WARN_DOCUMENTATION_COMMENTS = YES;
+				CLANG_WARN_OBJC_ROOT_CLASS = YES_ERROR;
+				CLANG_WARN_UNGUARDED_AVAILABILITY = YES_AGGRESSIVE;
+				CODE_SIGN_ENTITLEMENTS = PunktfunkWidgetsExtension.entitlements;
+				CODE_SIGN_STYLE = Automatic;
+				CURRENT_PROJECT_VERSION = 1;
+				DEVELOPMENT_TEAM = F4H37KF6WC;
+				GCC_C_LANGUAGE_STANDARD = gnu17;
+				GCC_WARN_ABOUT_RETURN_TYPE = YES_ERROR;
+				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
+				GENERATE_INFOPLIST_FILE = YES;
+				INFOPLIST_FILE = PunktfunkWidgets/Info.plist;
+				INFOPLIST_KEY_CFBundleDisplayName = PunktfunkWidgets;
+				INFOPLIST_KEY_NSHumanReadableCopyright = "";
+				IPHONEOS_DEPLOYMENT_TARGET = 27.0;
+				LD_RUNPATH_SEARCH_PATHS = (
+					"$(inherited)",
+					"@executable_path/Frameworks",
+					"@executable_path/../../Frameworks",
+				);
+				LOCALIZATION_PREFERS_STRING_CATALOGS = YES;
+				MARKETING_VERSION = 1.0;
+				PRODUCT_BUNDLE_IDENTIFIER = io.unom.punktfunk.widgets;
+				PRODUCT_NAME = "$(TARGET_NAME)";
+				REGISTER_APP_GROUPS = YES;
+				SDKROOT = iphoneos;
+				SKIP_INSTALL = YES;
+				STRING_CATALOG_GENERATE_SYMBOLS = YES;
+				SWIFT_APPROACHABLE_CONCURRENCY = YES;
+				SWIFT_EMIT_LOC_STRINGS = YES;
+				SWIFT_UPCOMING_FEATURE_MEMBER_IMPORT_VISIBILITY = YES;
+				SWIFT_VERSION = 5.0;
+				TARGETED_DEVICE_FAMILY = "1,2";
+			};
+			name = Debug;
+		};
+		E29556AC300948BA009F939C /* Release */ = {
+			isa = XCBuildConfiguration;
+			buildSettings = {
+				ASSETCATALOG_COMPILER_GLOBAL_ACCENT_COLOR_NAME = AccentColor;
+				ASSETCATALOG_COMPILER_WIDGET_BACKGROUND_COLOR_NAME = WidgetBackground;
+				CLANG_ANALYZER_NUMBER_OBJECT_CONVERSION = YES_AGGRESSIVE;
+				CLANG_CXX_LANGUAGE_STANDARD = "gnu++20";
+				CLANG_ENABLE_OBJC_WEAK = YES;
+				CLANG_WARN_DIRECT_OBJC_ISA_USAGE = YES_ERROR;
+				CLANG_WARN_DOCUMENTATION_COMMENTS = YES;
+				CLANG_WARN_OBJC_ROOT_CLASS = YES_ERROR;
+				CLANG_WARN_UNGUARDED_AVAILABILITY = YES_AGGRESSIVE;
+				CODE_SIGN_ENTITLEMENTS = PunktfunkWidgetsExtension.entitlements;
+				CODE_SIGN_STYLE = Automatic;
+				CURRENT_PROJECT_VERSION = 1;
+				DEVELOPMENT_TEAM = F4H37KF6WC;
+				GCC_C_LANGUAGE_STANDARD = gnu17;
+				GCC_WARN_ABOUT_RETURN_TYPE = YES_ERROR;
+				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
+				GENERATE_INFOPLIST_FILE = YES;
+				INFOPLIST_FILE = PunktfunkWidgets/Info.plist;
+				INFOPLIST_KEY_CFBundleDisplayName = PunktfunkWidgets;
+				INFOPLIST_KEY_NSHumanReadableCopyright = "";
+				IPHONEOS_DEPLOYMENT_TARGET = 27.0;
+				LD_RUNPATH_SEARCH_PATHS = (
+					"$(inherited)",
+					"@executable_path/Frameworks",
+					"@executable_path/../../Frameworks",
+				);
+				LOCALIZATION_PREFERS_STRING_CATALOGS = YES;
+				MARKETING_VERSION = 1.0;
+				PRODUCT_BUNDLE_IDENTIFIER = io.unom.punktfunk.widgets;
+				PRODUCT_NAME = "$(TARGET_NAME)";
+				REGISTER_APP_GROUPS = YES;
+				SDKROOT = iphoneos;
+				SKIP_INSTALL = YES;
+				STRING_CATALOG_GENERATE_SYMBOLS = YES;
+				SWIFT_APPROACHABLE_CONCURRENCY = YES;
+				SWIFT_EMIT_LOC_STRINGS = YES;
+				SWIFT_UPCOMING_FEATURE_MEMBER_IMPORT_VISIBILITY = YES;
+				SWIFT_VERSION = 5.0;
+				TARGETED_DEVICE_FAMILY = "1,2";
+				VALIDATE_PRODUCT = YES;
+			};
+			name = Release;
+		};
 /* End XCBuildConfiguration section */

 /* Begin XCConfigurationList section */
@@ -605,6 +819,15 @@
 			defaultConfigurationIsVisible = 0;
 			defaultConfigurationName = Release;
 		};
+		E29556AE300948BA009F939C /* Build configuration list for PBXNativeTarget "PunktfunkWidgetsExtension" */ = {
+			isa = XCConfigurationList;
+			buildConfigurations = (
+				E29556AB300948BA009F939C /* Debug */,
+				E29556AC300948BA009F939C /* Release */,
+			);
+			defaultConfigurationIsVisible = 0;
+			defaultConfigurationName = Release;
+		};
 /* End XCConfigurationList section */

 /* Begin XCLocalSwiftPackageReference section */
@@ -638,6 +861,10 @@
 			isa = XCSwiftPackageProductDependency;
 			productName = PunktfunkKit;
 		};
+		E2CAFE000000000000000002 /* PunktfunkShared */ = {
+			isa = XCSwiftPackageProductDependency;
+			productName = PunktfunkShared;
+		};
 		DD0000000000000000000002 /* SwiftUINavigationTransitions */ = {
 			isa = XCSwiftPackageProductDependency;
 			package = DD0000000000000000000001 /* XCRemoteSwiftPackageReference "swiftui-navigation-transitions" */;
@@ -0,0 +1,11 @@
+{
+  "colors" : [
+    {
+      "idiom" : "universal"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}
@@ -0,0 +1,35 @@
+{
+  "images" : [
+    {
+      "idiom" : "universal",
+      "platform" : "ios",
+      "size" : "1024x1024"
+    },
+    {
+      "appearances" : [
+        {
+          "appearance" : "luminosity",
+          "value" : "dark"
+        }
+      ],
+      "idiom" : "universal",
+      "platform" : "ios",
+      "size" : "1024x1024"
+    },
+    {
+      "appearances" : [
+        {
+          "appearance" : "luminosity",
+          "value" : "tinted"
+        }
+      ],
+      "idiom" : "universal",
+      "platform" : "ios",
+      "size" : "1024x1024"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}
@@ -0,0 +1,6 @@
+{
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}
@@ -0,0 +1,11 @@
+{
+  "colors" : [
+    {
+      "idiom" : "universal"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}
@@ -0,0 +1,186 @@
+// Home-Screen / Lock-Screen quick-launch widget (kind "PunktfunkHosts"). Reads the saved-host
+// store from the shared App-Group suite, sorts most-recent-first, and deep-links each host into a
+// session via `punktfunk://connect/<uuid>` — the app's onOpenURL routes it through the normal
+// connect path (trust policy / WoL / approval all apply).
+//
+// No reachability probing in v1 (a UDP check has no place in a timeline build; WoL handles offline
+// hosts on tap). Timeline is a single `.never` entry — the app pushes reloads on store changes
+// (HostStore → WidgetCenter.reloadTimelines).
+
+import SwiftUI
+import WidgetKit
+
+import PunktfunkShared
+
+// MARK: - Timeline
+
+struct HostsEntry: TimelineEntry {
+    let date: Date
+    let hosts: [StoredHost]
+}
+
+struct HostsProvider: TimelineProvider {
+    func placeholder(in context: Context) -> HostsEntry {
+        HostsEntry(date: .now, hosts: [])
+    }
+
+    func getSnapshot(in context: Context, completion: @escaping (HostsEntry) -> Void) {
+        completion(HostsEntry(date: .now, hosts: Self.loadHosts()))
+    }
+
+    func getTimeline(in context: Context, completion: @escaping (Timeline<HostsEntry>) -> Void) {
+        // Single entry, never auto-refresh: the app reloads this timeline whenever the store
+        // changes (a new host, a fresh connect reordering by recency).
+        let entry = HostsEntry(date: .now, hosts: Self.loadHosts())
+        completion(Timeline(entries: [entry], policy: .never))
+    }
+
+    /// Decode the shared-suite host JSON (same wire format the app writes), most-recent first.
+    static func loadHosts() -> [StoredHost] {
+        guard let data = AppGroup.defaults.data(forKey: DefaultsKey.hosts),
+              let hosts = try? JSONDecoder().decode([StoredHost].self, from: data)
+        else { return [] }
+        return hosts.sorted {
+            ($0.lastConnected ?? .distantPast) > ($1.lastConnected ?? .distantPast)
+        }
+    }
+}
+
+// MARK: - Widget
+
+struct HostsWidget: Widget {
+    var body: some WidgetConfiguration {
+        StaticConfiguration(kind: "PunktfunkHosts", provider: HostsProvider()) { entry in
+            HostsWidgetView(entry: entry)
+                .containerBackground(.fill.tertiary, for: .widget)
+        }
+        .configurationDisplayName("Punktfunk Hosts")
+        .description("Quick-launch your recent streaming hosts.")
+        .supportedFamilies([
+            .systemSmall, .systemMedium, .accessoryCircular, .accessoryRectangular,
+        ])
+    }
+}
+
+// MARK: - Views
+
+struct HostsWidgetView: View {
+    @Environment(\.widgetFamily) private var family
+    let entry: HostsEntry
+
+    var body: some View {
+        switch family {
+        case .systemMedium:
+            MediumHostsView(hosts: entry.hosts)
+        case .accessoryCircular:
+            CircularHostView(host: entry.hosts.first)
+        case .accessoryRectangular:
+            RectangularHostView(host: entry.hosts.first)
+        default: // systemSmall + fallback
+            SmallHostView(host: entry.hosts.first)
+        }
+    }
+}
+
+/// Deep link that connects to a stored host.
+private func connectURL(_ host: StoredHost) -> URL {
+    DeepLink.connect(host: host.id, launchID: nil).url
+}
+
+private struct SmallHostView: View {
+    let host: StoredHost?
+    var body: some View {
+        if let host {
+            VStack(alignment: .leading, spacing: 6) {
+                Image(systemName: "play.tv.fill")
+                    .font(.title2)
+                    .foregroundStyle(.tint)
+                Spacer(minLength: 0)
+                Text(host.displayName)
+                    .font(.headline)
+                    .lineLimit(2)
+                if let last = host.lastConnected {
+                    Text(last, format: .relative(presentation: .named))
+                        .font(.caption2)
+                        .foregroundStyle(.secondary)
+                }
+            }
+            .frame(maxWidth: .infinity, maxHeight: .infinity, alignment: .topLeading)
+            .widgetURL(connectURL(host))
+        } else {
+            EmptyHostView()
+        }
+    }
+}
+
+private struct MediumHostsView: View {
+    let hosts: [StoredHost]
+    var body: some View {
+        if hosts.isEmpty {
+            EmptyHostView()
+        } else {
+            VStack(alignment: .leading, spacing: 8) {
+                Text("Punktfunk")
+                    .font(.caption).bold()
+                    .foregroundStyle(.tint)
+                ForEach(hosts.prefix(4)) { host in
+                    Link(destination: connectURL(host)) {
+                        HStack {
+                            Image(systemName: "play.tv.fill")
+                                .foregroundStyle(.tint)
+                            Text(host.displayName)
+                                .font(.subheadline)
+                                .lineLimit(1)
+                            Spacer()
+                            if let last = host.lastConnected {
+                                Text(last, format: .relative(presentation: .named))
+                                    .font(.caption2)
+                                    .foregroundStyle(.secondary)
+                            }
+                        }
+                    }
+                }
+                Spacer(minLength: 0)
+            }
+            .frame(maxWidth: .infinity, maxHeight: .infinity, alignment: .topLeading)
+        }
+    }
+}
+
+private struct CircularHostView: View {
+    let host: StoredHost?
+    var body: some View {
+        ZStack {
+            AccessoryWidgetBackground()
+            Image(systemName: "play.tv.fill")
+        }
+        .widgetURL(host.map(connectURL))
+    }
+}
+
+private struct RectangularHostView: View {
+    let host: StoredHost?
+    var body: some View {
+        HStack {
+            Image(systemName: "play.tv.fill")
+            Text(host?.displayName ?? "Punktfunk")
+                .lineLimit(1)
+        }
+        .widgetURL(host.map(connectURL))
+    }
+}
+
+private struct EmptyHostView: View {
+    var body: some View {
+        VStack(spacing: 6) {
+            Image(systemName: "play.tv")
+                .font(.title2)
+                .foregroundStyle(.secondary)
+            Text("Open Punktfunk to add a host.")
+                .font(.caption)
+                .multilineTextAlignment(.center)
+                .foregroundStyle(.secondary)
+        }
+        .frame(maxWidth: .infinity, maxHeight: .infinity)
+    }
+}
@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>NSExtension</key>
+	<dict>
+		<key>NSExtensionPointIdentifier</key>
+		<string>com.apple.widgetkit-extension</string>
+	</dict>
+</dict>
+</plist>
@@ -0,0 +1,20 @@
+// The widget extension's entry point. ONE extension target (bundle id io.unom.punktfunk.widgets,
+// iOS only) hosts both the launcher widgets and the Live Activity UI. It links PunktfunkShared and
+// NOTHING else — never PunktfunkKit (Rust staticlib + presentation layer would blow the widget
+// process's ~30 MB budget).
+//
+// These files are NOT part of the SwiftPM package (Package.swift doesn't declare a PunktfunkWidgets
+// target, so `swift build` ignores the directory). They compile only in the Xcode widget-extension
+// target you add pointing at this folder — see design/apple-live-activities-and-widgets.md §M1 and
+// the GUI checklist.
+
+import SwiftUI
+import WidgetKit
+
+@main
+struct PunktfunkWidgetBundle: WidgetBundle {
+    var body: some Widget {
+        HostsWidget()
+        PunktfunkSessionLiveActivity()
+    }
+}
@@ -0,0 +1,140 @@
+// The Live Activity UI (Lock Screen banner + Dynamic Island) for a running session. The app owns
+// the Activity's lifecycle (SessionActivityController); this is only its presentation, rendered in
+// the widget-extension process from the shared `PunktfunkSessionAttributes`.
+//
+// The End button runs `EndStreamIntent` (a LiveActivityIntent) IN THE APP's process, which posts
+// .punktfunkEndActiveSession → the app disconnects. Elapsed time ticks client-side via
+// Text(timerInterval:) — no per-second push.
+
+import ActivityKit
+import AppIntents
+import SwiftUI
+import WidgetKit
+
+import PunktfunkShared
+
+struct PunktfunkSessionLiveActivity: Widget {
+    var body: some WidgetConfiguration {
+        ActivityConfiguration(for: PunktfunkSessionAttributes.self) { context in
+            LockScreenView(context: context)
+                .activitySystemActionForegroundColor(.white)
+        } dynamicIsland: { context in
+            DynamicIsland {
+                DynamicIslandExpandedRegion(.leading) {
+                    Label {
+                        Text(context.attributes.hostName).font(.caption).lineLimit(1)
+                    } icon: {
+                        Image(systemName: "play.tv.fill")
+                    }
+                    .foregroundStyle(.tint)
+                }
+                DynamicIslandExpandedRegion(.trailing) {
+                    Text(timerInterval: context.state.startedAt...Date.distantFuture, countsDown: false)
+                        .font(.caption).monospacedDigit()
+                        .frame(maxWidth: 56)
+                        .foregroundStyle(.secondary)
+                }
+                DynamicIslandExpandedRegion(.center) {
+                    if let title = context.attributes.launchTitle {
+                        Text(title).font(.caption2).lineLimit(1).foregroundStyle(.secondary)
+                    }
+                }
+                DynamicIslandExpandedRegion(.bottom) {
+                    VStack(spacing: 6) {
+                        Text(context.state.modeLine)
+                            .font(.caption2).foregroundStyle(.secondary).lineLimit(1)
+                        StageLine(state: context.state)
+                        EndButton()
+                    }
+                }
+            } compactLeading: {
+                Image(systemName: "play.tv.fill").foregroundStyle(.tint)
+            } compactTrailing: {
+                Text(timerInterval: context.state.startedAt...Date.distantFuture, countsDown: false)
+                    .monospacedDigit()
+                    .frame(maxWidth: 44)
+            } minimal: {
+                Image(systemName: "play.tv.fill").foregroundStyle(.tint)
+            }
+        }
+    }
+}
+
+// MARK: - Lock Screen banner
+
+private struct LockScreenView: View {
+    let context: ActivityViewContext<PunktfunkSessionAttributes>
+
+    var body: some View {
+        HStack(alignment: .top, spacing: 12) {
+            Image(systemName: "play.tv.fill")
+                .font(.title2)
+                .foregroundStyle(.tint)
+            VStack(alignment: .leading, spacing: 3) {
+                HStack {
+                    Text(context.attributes.hostName).font(.headline).lineLimit(1)
+                    Spacer()
+                    Text(timerInterval: context.state.startedAt...Date.distantFuture, countsDown: false)
+                        .font(.subheadline).monospacedDigit()
+                        .foregroundStyle(.secondary)
+                }
+                if let title = context.attributes.launchTitle {
+                    Text(title).font(.caption).foregroundStyle(.secondary).lineLimit(1)
+                }
+                Text(context.state.modeLine)
+                    .font(.caption2).foregroundStyle(.secondary).lineLimit(1)
+                StageLine(state: context.state)
+            }
+            if context.state.stage == .background {
+                EndButton()
+            }
+        }
+        .padding()
+    }
+}
+
+// MARK: - Shared pieces
+
+/// The stage badge + (while backgrounded) the auto-disconnect countdown.
+private struct StageLine: View {
+    let state: PunktfunkSessionAttributes.ContentState
+
+    var body: some View {
+        switch state.stage {
+        case .streaming:
+            EmptyView()
+        case .background:
+            if let deadline = state.backgroundDeadline {
+                HStack(spacing: 3) {
+                    Text("Keeps running for")
+                    Text(timerInterval: Date()...deadline, countsDown: true)
+                        .monospacedDigit()
+                }
+                .font(.caption2)
+                .foregroundStyle(.secondary)
+            } else {
+                badge("Running in background", .orange)
+            }
+        case .reconnecting:
+            badge("Reconnecting…", .yellow)
+        case .ending:
+            badge("Session ended", .secondary)
+        }
+    }
+
+    private func badge(_ text: String, _ color: Color) -> some View {
+        Text(text).font(.caption2).foregroundStyle(color)
+    }
+}
+
+/// End-stream button — runs EndStreamIntent in the app process (LiveActivityIntent).
+private struct EndButton: View {
+    var body: some View {
+        Button(intent: EndStreamIntent()) {
+            Label("End", systemImage: "stop.fill")
+                .font(.caption).bold()
+        }
+        .tint(.red)
+        .buttonStyle(.bordered)
+    }
+}
@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>com.apple.security.application-groups</key>
+	<array>
+		<string>group.io.unom.punktfunk</string>
+	</array>
+</dict>
+</plist>
@@ -46,10 +46,20 @@ struct ContentView: View {
        case "h264": return PunktfunkConnection.codecH264
        case "hevc": return PunktfunkConnection.codecHEVC
        case "av1": return PunktfunkConnection.codecAV1
+        case "pyrowave": return PunktfunkConnection.codecPyroWave
        default: return 0
        }
    }
    @State private var showAddHost = false
+    /// A `punktfunk://` deep link (widget / Siri / Shortcuts) couldn't be honored — unknown host, or
+    /// a live session is already up. Surfaced as an informational alert (distinct from the
+    /// "Connection failed" one, which is for actual connect errors).
+    @State private var deepLinkNotice: String?
+    #if os(iOS)
+    /// Owns the Live Activity for the running session (Lock Screen / Dynamic Island). Driven from
+    /// the session model's published state below; iPhone/iPad only.
+    @State private var liveActivity = SessionActivityController()
+    #endif
    @State private var pairingTarget: StoredHost?
    /// A fresh `pair=required`/unknown host the user tapped: drives the choice between no-PIN
    /// delegated approval ("Request Access") and the SPAKE2 PIN ceremony (rule 3b).
@@ -91,6 +101,14 @@ struct ContentView: View {
    /// fires Wake-on-LAN up front and falls into the "Waking…" wait if the dial fails. Off: connects
    /// go straight through with no wake. The explicit "Wake Host" action is unaffected either way.
    @AppStorage(DefaultsKey.autoWake) private var autoWakeEnabled = true
+    /// Background keep-alive (Settings → General, iOS-only). Default OFF (today's freeze-on-background
+    /// is the default). When on, backgrounding a live session keeps audio + the connection alive and
+    /// drops video, auto-disconnecting after `backgroundTimeoutMinutes`.
+    @AppStorage(DefaultsKey.backgroundKeepAlive) private var backgroundKeepAlive = false
+    @AppStorage(DefaultsKey.backgroundTimeoutMinutes) private var backgroundTimeoutMinutes = 10
+    /// scenePhase drives the keep-alive: use THIS, not the willResignActive observers — resign-active
+    /// also fires for Control Center / app-switcher peeks, where the disconnect timer must not start.
+    @Environment(\.scenePhase) private var scenePhase
    private var gamepadUIActive: Bool {
        GamepadUIEnvironment.isActive(
            gamepadConnected: gamepadManager.active != nil, enabledSetting: gamepadUIEnabled)
@@ -112,7 +130,62 @@ struct ContentView: View {
        .onAppear {
            seedDefaultModeIfNeeded()
            autoConnectIfAsked()
+            #if os(iOS)
+            SessionActivityController.sweepOrphans() // end any Activity a prior killed launch left
+            #endif
        }
+        // Deep links (widget quick-launch, Siri/Shortcuts): route into the SAME connect path a card
+        // tap uses, so trust policy / WoL / the approval sheet all come along. Never starts a
+        // parallel session — this drives the one `model` ContentView owns.
+        .onOpenURL { handleDeepLink($0) }
+        #if os(iOS)
+        // Background keep-alive driver (opt-in). Only .background/.active matter; .inactive (a
+        // transient peek) is ignored so the disconnect timer never starts for a Control-Center pull.
+        .onChange(of: scenePhase) { _, phase in
+            switch phase {
+            case .background:
+                if backgroundKeepAlive, model.phase == .streaming {
+                    model.enterBackground(timeoutMinutes: backgroundTimeoutMinutes)
+                }
+            case .active:
+                model.exitBackground()
+            default:
+                break
+            }
+        }
+        // Live Activity lifecycle, driven from the model's published state.
+        .onChange(of: model.phase) { _, phase in
+            switch phase {
+            case .streaming:
+                if let host = model.activeHost {
+                    liveActivity.begin(
+                        hostID: host.id, hostName: host.displayName,
+                        launchTitle: nil, // no live foreground-app title mid-session (v1)
+                        modeLine: currentModeLine(), startedAt: Date())
+                }
+            case .idle:
+                liveActivity.end()
+            default:
+                break
+            }
+        }
+        .onChange(of: model.isBackgrounded) { _, backgrounded in
+            liveActivity.update {
+                $0.stage = backgrounded ? .background : .streaming
+                $0.backgroundDeadline = model.backgroundDeadline
+            }
+        }
+        // The Live Activity's / Shortcuts' End button runs EndStreamIntent in-process, which posts
+        // this — tear the session down deliberately (quit-close the host).
+        .onReceive(NotificationCenter.default.publisher(for: .punktfunkEndActiveSession)) { _ in
+            model.disconnect(deliberate: true)
+        }
+        // Connect App Intent (Siri/Shortcuts): route its punktfunk:// URL through the same handler
+        // as a widget tap.
+        .onReceive(NotificationCenter.default.publisher(for: .punktfunkOpenDeepLink)) { note in
+            if let url = note.object as? URL { handleDeepLink(url) }
+        }
+        #endif
        .onChange(of: model.phase) { _, phase in
            switch phase {
            case .streaming:
@@ -261,6 +334,57 @@ struct ContentView: View {
                + "console (port 3000 → Pairing). This device connects automatically once you "
                + "approve it — no need to reconnect.")
        }
+        // Informational deep-link outcome (unknown host / already streaming). Not an error.
+        .alert(
+            "Can't open",
+            isPresented: Binding(
+                get: { deepLinkNotice != nil },
+                set: { if !$0 { deepLinkNotice = nil } })
+        ) {
+            Button("OK", role: .cancel) {}
+        } message: {
+            Text(deepLinkNotice ?? "")
+        }
+    }
+
+    #if os(iOS)
+    /// The Live Activity mode line, e.g. "2560×1440 @120 · HEVC · HDR", from the live connection.
+    private func currentModeLine() -> String {
+        guard let c = model.connection else { return "" }
+        let codec: String
+        switch c.videoCodec {
+        case .h264: codec = "H.264"
+        case .hevc: codec = "HEVC"
+        case .av1: codec = "AV1"
+        case .pyrowave: codec = "PyroWave"
+        }
+        var line = "\(c.width)×\(c.height)"
+        if c.refreshHz > 0 { line += " @\(c.refreshHz)" }
+        line += " · \(codec)"
+        if c.isHDR { line += " · HDR" }
+        return line
+    }
+    #endif
+
+    /// Route a `punktfunk://` deep link into the existing connect path. Rules (per design):
+    /// unknown host → notice + no-op; a live session is up → ignore if it's the same host, else
+    /// tell the user to end the current one first (NEVER tear down a live session on a background
+    /// tap); otherwise the normal `connect` — trust policy, WoL and the approval sheet all apply.
+    private func handleDeepLink(_ url: URL) {
+        guard case let .connect(hostID, launchID)? = DeepLink(url) else { return }
+        guard let host = store.hosts.first(where: { $0.id == hostID }) else {
+            deepLinkNotice = "That host isn't saved on this device."
+            return
+        }
+        if model.phase != .idle {
+            guard model.activeHost?.id == hostID else {
+                let current = model.activeHost?.displayName ?? "a host"
+                deepLinkNotice = "Already streaming \(current). End that session first."
+                return
+            }
+            return // deep-linked to the host we're already on — nothing to do
+        }
+        connect(host, launchID: launchID)
    }

    private var home: some View {
@@ -0,0 +1,102 @@
+// Siri / Shortcuts / Spotlight surface (design §M4). Deliberately thin: every action already has an
+// internal entry point — M0's deep-link router (connect / connect-and-launch), M3's in-process
+// end-session hook, and the existing Wake-on-LAN path — so these intents only wrap them.
+//
+// Gated os(iOS): the AppShortcutsProvider bundles `EndStreamIntent`, which is a LiveActivityIntent
+// (iPhone/iPad only). Connect/Wake themselves are plain AppIntents; they live here with the
+// provider rather than being split across platforms. `HostEntity` (the parameter type) is in
+// PunktfunkShared so the widget's configuration intent can share it.
+
+#if os(iOS)
+import AppIntents
+import Foundation
+import PunktfunkKit
+
+/// Load a full saved host (MACs, address) from the shared App-Group store by id — HostEntity only
+/// carries id + name.
+private func loadStoredHost(_ id: UUID) -> StoredHost? {
+    guard let data = AppGroup.defaults.data(forKey: DefaultsKey.hosts),
+          let hosts = try? JSONDecoder().decode([StoredHost].self, from: data)
+    else { return nil }
+    return hosts.first { $0.id == id }
+}
+
+/// Start a session with a stored host (optionally launching a title). Foregrounds the app and
+/// routes through the SAME `.onOpenURL` path a widget tap uses — trust policy, WoL and the approval
+/// sheet all apply, and its guards (unknown host, already-streaming) hold.
+struct ConnectToHostIntent: AppIntent {
+    static let title: LocalizedStringResource = "Connect to Host"
+    static let description = IntentDescription("Start a Punktfunk streaming session with a host.")
+    static let openAppWhenRun = true
+
+    @Parameter(title: "Host") var host: HostEntity
+    @Parameter(title: "Game ID", description: "Optional store id like steam:570")
+    var launchID: String?
+
+    func perform() async throws -> some IntentResult {
+        let url = DeepLink.connect(host: host.id, launchID: launchID).url
+        await MainActor.run {
+            NotificationCenter.default.post(name: .punktfunkOpenDeepLink, object: url)
+        }
+        return .result()
+    }
+}
+
+/// Wake a sleeping host (magic packet). No `openAppWhenRun` — usable in automations ("when I get
+/// home, wake the tower") without foregrounding the app.
+struct WakeHostIntent: AppIntent {
+    static let title: LocalizedStringResource = "Wake Host"
+    static let description = IntentDescription("Send a Wake-on-LAN magic packet to a host.")
+
+    @Parameter(title: "Host") var host: HostEntity
+
+    func perform() async throws -> some IntentResult {
+        guard let stored = loadStoredHost(host.id), !stored.wakeMacs.isEmpty else {
+            throw IntentError.noWakeAddress
+        }
+        PunktfunkConnection.wakeOnLAN(macs: stored.wakeMacs, lastKnownIP: stored.address)
+        return .result()
+    }
+}
+
+/// Errors surfaced to Siri/Shortcuts. `CustomLocalizedStringResourceConvertible` makes the message
+/// show as the intent's failure text.
+enum IntentError: Error, CustomLocalizedStringResourceConvertible {
+    case noWakeAddress
+
+    var localizedStringResource: LocalizedStringResource {
+        switch self {
+        case .noWakeAddress:
+            // One string LITERAL — LocalizedStringResource is ExpressibleByStringLiteral, but a
+            // `"…" + "…"` concatenation is a runtime String it can't convert.
+            return "That host has no saved Wake-on-LAN address yet. Connect to it once so Punktfunk can learn it."
+        }
+    }
+}
+
+/// Zero-setup Siri / Spotlight phrases. Parameterized phrases resolve a `HostEntity` by name; stays
+/// well under the 10-shortcut cap.
+struct PunktfunkShortcuts: AppShortcutsProvider {
+    static var appShortcuts: [AppShortcut] {
+        AppShortcut(
+            intent: ConnectToHostIntent(),
+            phrases: [
+                "Connect to \(\.$host) in \(.applicationName)",
+                "Stream \(\.$host) with \(.applicationName)",
+            ],
+            shortTitle: "Connect", systemImageName: "play.tv.fill")
+        AppShortcut(
+            intent: WakeHostIntent(),
+            phrases: [
+                "Wake \(\.$host) with \(.applicationName)",
+            ],
+            shortTitle: "Wake Host", systemImageName: "power")
+        AppShortcut(
+            intent: EndStreamIntent(),
+            phrases: [
+                "End the \(.applicationName) stream",
+            ],
+            shortTitle: "End Stream", systemImageName: "stop.fill")
+    }
+}
+#endif
@@ -0,0 +1,89 @@
+// Owns the ActivityKit Live Activity lifecycle for a streaming session (iPhone/iPad only). Driven
+// by ContentView from the session model's published state (phase / isBackgrounded / deadline) so
+// none of this leaks into the cross-platform SessionModel. Local updates only (`pushType: nil`) —
+// the app process is alive whenever there's a session to report, so there's no push token plumbing.
+//
+// Gated os(iOS): ActivityKit is iPhone/iPad only. Minimum deployment is iOS 17, so no @available
+// guards are needed (Activity has existed since 16.1).
+
+#if os(iOS)
+import ActivityKit
+import Foundation
+// PunktfunkKit re-exports PunktfunkShared (@_exported), so the app target sees PunktfunkSessionAttributes
+// without linking the Shared product directly — same pattern as StoredHost in HostStore.
+import PunktfunkKit
+
+@MainActor
+final class SessionActivityController {
+    private var activity: Activity<PunktfunkSessionAttributes>?
+    /// The last pushed state, so an update can mutate one field and keep the rest (notably
+    /// `startedAt`, which the Lock-Screen timer ticks from).
+    private var state: PunktfunkSessionAttributes.ContentState?
+
+    /// How far past the next expected update to mark the content stale — a frozen opt-out session
+    /// then greys out instead of showing a lying clock.
+    private static let staleWindow: TimeInterval = 90
+
+    var isActive: Bool { activity != nil }
+
+    /// End any Activity left over from a previous launch that was killed mid-session. Call once at
+    /// app start (ContentView.onAppear).
+    static func sweepOrphans() {
+        Task {
+            for activity in Activity<PunktfunkSessionAttributes>.activities {
+                await activity.end(nil, dismissalPolicy: .immediate)
+            }
+        }
+    }
+
+    /// Start the Live Activity for a freshly-streaming session. No-op if the user disabled Live
+    /// Activities for the app, or one is already up.
+    func begin(hostID: UUID, hostName: String, launchTitle: String?, modeLine: String, startedAt: Date) {
+        guard ActivityAuthorizationInfo().areActivitiesEnabled, activity == nil else { return }
+        let attributes = PunktfunkSessionAttributes(
+            hostID: hostID, hostName: hostName, launchTitle: launchTitle)
+        let initial = PunktfunkSessionAttributes.ContentState(
+            stage: .streaming, startedAt: startedAt, modeLine: modeLine)
+        state = initial
+        do {
+            activity = try Activity.request(
+                attributes: attributes,
+                content: content(initial),
+                pushType: nil)
+        } catch {
+            activity = nil
+            state = nil
+        }
+    }
+
+    /// Coalesced update: mutate the running state in place (keeps `startedAt` etc.) and push once.
+    /// No-op when there's no live Activity.
+    func update(_ mutate: (inout PunktfunkSessionAttributes.ContentState) -> Void) {
+        guard let activity, var next = state else { return }
+        mutate(&next)
+        state = next
+        Task { await activity.update(content(next)) }
+    }
+
+    /// End with a final "ended" state, dismissed a few seconds later.
+    func end() {
+        guard let activity, var final = state else {
+            self.activity = nil
+            state = nil
+            return
+        }
+        self.activity = nil
+        state = nil
+        final.stage = .ending
+        final.backgroundDeadline = nil
+        Task {
+            await activity.end(content(final), dismissalPolicy: .after(.now + 4))
+        }
+    }
+
+    private func content(_ s: PunktfunkSessionAttributes.ContentState)
+        -> ActivityContent<PunktfunkSessionAttributes.ContentState> {
+        ActivityContent(state: s, staleDate: Date().addingTimeInterval(Self.staleWindow))
+    }
+}
+#endif
@@ -148,6 +148,16 @@ final class SessionModel: ObservableObject {

    var isBusy: Bool { phase != .idle }

+    /// True while a streaming session is running in the background under the opt-in keep-alive
+    /// (audio plays, video dropped, timeout armed). Drives the Live Activity's stage/countdown (M3)
+    /// and is cleared on foreground or teardown. iOS/iPadOS only in practice.
+    @Published private(set) var isBackgrounded = false
+    /// When the backgrounded keep-alive will auto-disconnect (nil unless backgrounded) — drives the
+    /// Live Activity countdown. Set alongside `backgroundTimer`.
+    @Published private(set) var backgroundDeadline: Date?
+    /// Bounded auto-disconnect for a backgrounded keep-alive session. Fires on `.main`.
+    private var backgroundTimer: DispatchSourceTimer?
+
    /// `allowTofu` gates the trust-on-first-use prompt for an unpinned host: it is only true
    /// when the host EXPLICITLY advertised `pair=optional` (rule 3a). For any other unpinned host
    /// — `pair=required`, a manually-typed host, or a discovered host with no/unknown `pair`
@@ -239,6 +249,18 @@ final class SessionModel: ObservableObject {
            // from these + the soft `preferredCodec`; `resolvedCodec` reflects what it chose.
            var videoCodecs = PunktfunkConnection.codecH264 | PunktfunkConnection.codecHEVC
            if AV1.hardwareDecodeSupported { videoCodecs |= PunktfunkConnection.codecAV1 }
+            // PyroWave (wired LAN) is a pure opt-in: picking it in the codec setting both
+            // advertises the bit and prefers it — the host never auto-selects it, and the
+            // picker only offers it when the Metal decode probe passed (simdgroup floor ≈ A13;
+            // every M-series Mac and the ATV 4K gen 3 pass). The codec is 8-bit 4:2:0 SDR
+            // BT.709 by contract, so the opt-in also drops the HDR/10-bit/4:4:4 caps for this
+            // session — HDR sessions stay HEVC/AV1 (plan §4.7).
+            if preferredCodec == PunktfunkConnection.codecPyroWave, MetalWaveletDecoder.supported {
+                videoCodecs |= PunktfunkConnection.codecPyroWave
+                videoCaps &= ~(PunktfunkConnection.videoCap10Bit
+                    | PunktfunkConnection.videoCapHDR
+                    | PunktfunkConnection.videoCap444)
+            }
            let result = Result { try PunktfunkConnection(
                host: host.address, port: host.port,
                width: width, height: height, refreshHz: hz,
@@ -284,10 +306,15 @@ final class SessionModel: ObservableObject {
                        self.errorMessage = "\(host.displayName) is not paired yet. "
                            + "Pair with its PIN before streaming."
                    }
-                case .failure:
+                case .failure(let error):
                    self.phase = .idle
                    self.activeHost = nil
-                    if let onUnreachable, !requestAccess {
+                    if case PunktfunkClientError.rejected(let rejection) = error {
+                        // The host answered and stated its reason (declined / approval timed
+                        // out / busy / versions differ) — show that, and never wake-retry a
+                        // host that is demonstrably awake.
+                        self.errorMessage = "\(host.displayName): \(rejection.userMessage)"
+                    } else if let onUnreachable, !requestAccess {
                        // The caller owns recovery (wake-and-retry) — no error alert here; its
                        // own overlay explains what's happening.
                        onUnreachable()
@@ -315,6 +342,48 @@ final class SessionModel: ObservableObject {
        }
    }

+    // MARK: - Background keep-alive (opt-in, iOS)
+
+    /// Enter the backgrounded keep-alive state: keep audio playing, DROP video decode (no GPU work
+    /// off-screen), mute the mic (privacy), and arm a bounded auto-disconnect. The caller
+    /// (ContentView's scenePhase driver) gates this on the setting + `.streaming`; a no-op otherwise.
+    /// The video-drop seam is read by both pumps every iteration (`connection.isVideoDropped`).
+    func enterBackground(timeoutMinutes: Int) {
+        guard phase == .streaming, let conn = connection, !isBackgrounded else { return }
+        isBackgrounded = true
+        conn.setVideoDropped(true)
+        audio?.setMicMuted(true)
+        // Non-deliberate on fire (keep the host linger) so a user who returns late reconnects fast,
+        // exactly like today's network-drop path. min 1 minute guards a nonsense setting.
+        let minutes = max(1, timeoutMinutes)
+        backgroundDeadline = Date().addingTimeInterval(TimeInterval(minutes * 60))
+        let timer = DispatchSource.makeTimerSource(queue: .main)
+        timer.schedule(deadline: .now() + .seconds(minutes * 60))
+        timer.setEventHandler { [weak self] in
+            // The timer fires on `.main`, so the actor's executor is the main thread here.
+            MainActor.assumeIsolated { self?.disconnect(deliberate: false) }
+        }
+        backgroundTimer?.cancel()
+        backgroundTimer = timer
+        timer.resume()
+    }
+
+    /// Return to foreground: cancel the timeout, resume mic + video, and force a clean re-anchor —
+    /// request a fresh IDR (infinite GOP: it won't come on its own) and let the pump's freeze gate
+    /// withhold the concealed frames until it lands (it auto-arms on the resumed frame-index gap).
+    func exitBackground() {
+        guard isBackgrounded else { return }
+        isBackgrounded = false
+        backgroundDeadline = nil
+        backgroundTimer?.cancel()
+        backgroundTimer = nil
+        audio?.setMicMuted(false)
+        if let conn = connection {
+            conn.setVideoDropped(false)
+            conn.requestKeyframe()
+        }
+    }
+
    /// The user confirmed the fingerprint: returns it for pinning and enters streaming.
    func confirmTrust() -> Data? {
        guard case .awaitingTrust(let fingerprint) = phase else { return nil }
@@ -332,6 +401,11 @@ final class SessionModel: ObservableObject {
    func disconnect(deliberate: Bool = true) {
        statsTimer?.invalidate()
        statsTimer = nil
+        // Drop any armed background keep-alive (incl. the timeout that just fired us).
+        backgroundTimer?.cancel()
+        backgroundTimer = nil
+        isBackgrounded = false
+        backgroundDeadline = nil
        let audio = self.audio
        self.audio = nil
        // Gamepad capture is main-actor (releases held buttons on the wire while the
@@ -15,6 +15,9 @@ import PunktfunkKit
 import SwiftUI
 #if os(iOS) || os(macOS) || os(tvOS)
 import GameController
+#if os(iOS)
+import CoreHaptics
+#endif

 struct GamepadSettingsView: View {
    @Environment(\.dismiss) private var dismiss
@@ -38,6 +41,9 @@ struct GamepadSettingsView: View {
    @AppStorage(DefaultsKey.gamepadUIEnabled) private var gamepadUIEnabled = true
    @AppStorage(DefaultsKey.autoWake) private var autoWakeEnabled = true
    @AppStorage(DefaultsKey.presenter) private var presenter = SettingsOptions.presenterDefault
+    #if os(iOS)
+    @AppStorage(DefaultsKey.rumbleOnDevice) private var rumbleOnDevice = false
+    #endif
    @ObservedObject private var gamepads = GamepadManager.shared

    #if os(iOS)
@@ -230,7 +236,7 @@ struct GamepadSettingsView: View {
            .map { (label: "\($0) Hz", tag: $0) }
        let bitrate = SettingsOptions.bitrateOptions(current: bitrateKbps)
        let controllers = SettingsOptions.controllerOptions(gamepads)
-        return [
+        var list: [Row] = [
            choiceRow(
                id: "resolution", header: "Stream", icon: "aspectratio",
                label: "Resolution",
@@ -329,6 +335,23 @@ struct GamepadSettingsView: View {
                detail: "Turn off to use the touch interface even with a controller connected.",
                value: $gamepadUIEnabled),
        ]
+        #if os(iOS)
+        // The device-rumble mirror slots in after "Controller type" (staying inside the
+        // Controller group — the next row carries the "Interface" header). iPhone only in
+        // practice: hidden where the device itself can't play haptics (iPad).
+        if CHHapticEngine.capabilitiesForHardware().supportsHaptics,
+            let at = list.firstIndex(where: { $0.id == "padType" }) {
+            list.insert(
+                toggleRow(
+                    id: "deviceRumble", icon: "iphone.radiowaves.left.and.right",
+                    label: "Rumble on this iPhone",
+                    detail: "Also play player 1's rumble on the phone's own Taptic Engine — "
+                        + "for clip-on pads without rumble motors.",
+                    value: $rumbleOnDevice),
+                at: at + 1)
+        }
+        #endif
+        return list
    }

    /// Resolution choices as "WxH" tags — the current size is inserted when it's a custom mode
@@ -79,6 +79,13 @@ enum SettingsOptions {
        if AV1.hardwareDecodeSupported {
            options.insert(("AV1", "av1"), at: 2)
        }
+        // PyroWave is the opt-in wired-LAN low-latency codec (100–400 Mbps all-intra wavelet,
+        // 8-bit SDR): selecting it advertises + prefers it for the session. Offered only when
+        // the Metal decode probe passes (same gate SessionModel advertises by) — elsewhere the
+        // host could never emit it.
+        if MetalWaveletDecoder.supported {
+            options.append(("PyroWave (wired LAN)", "pyrowave"))
+        }
        return options
    }()

@@ -1,6 +1,9 @@
 // SettingsView's shared sections — each setting's Section is defined exactly once here and
 // composed by the per-platform bodies in SettingsView.swift.

+#if os(iOS)
+import CoreHaptics
+#endif
 import PunktfunkKit
 import SwiftUI

@@ -437,6 +440,34 @@ extension SettingsView {
        }
    }

+    /// iOS/iPadOS only: keep a backgrounded session alive (audio background mode). Empty elsewhere
+    /// (tvOS backgrounding semantics differ; macOS isn't gated by the mode) so the shared `.general`
+    /// detail can reference it unconditionally.
+    @ViewBuilder var keepAliveSection: some View {
+        #if os(iOS)
+        Section {
+            Toggle("Keep streaming in background", isOn: $backgroundKeepAlive)
+            if backgroundKeepAlive {
+                Picker("Disconnect after", selection: $backgroundTimeoutMinutes) {
+                    Text("1 minute").tag(1)
+                    Text("5 minutes").tag(5)
+                    Text("10 minutes").tag(10)
+                    Text("30 minutes").tag(30)
+                }
+            }
+        } header: {
+            Text("Background")
+        } footer: {
+            Text("Off by default: backgrounding the app freezes the session. When on, audio keeps "
+                + "playing and the connection stays live (video is dropped to save power) after you "
+                + "switch away — and the session auto-disconnects after the time above so it can't "
+                + "run down your battery. Returning to the app resumes video instantly.")
+                .font(.geist(12, relativeTo: .caption))
+                .foregroundStyle(.secondary)
+        }
+        #endif
+    }
+
    @ViewBuilder var experimentalSection: some View {
        Section {
            Toggle("Show game library", isOn: $libraryEnabled)
@@ -471,6 +502,12 @@ extension SettingsView {
                    Text(option.label).tag(option.tag)
                }
            }
+            #if os(iOS)
+            // iPhone only in practice: hidden where the device itself can't play haptics (iPad).
+            if CHHapticEngine.capabilitiesForHardware().supportsHaptics {
+                Toggle("Rumble on this iPhone", isOn: $rumbleOnDevice)
+            }
+            #endif
            #if !os(tvOS)
            Toggle("Gamepad-optimized browsing", isOn: $gamepadUIEnabled)
            #endif
@@ -487,6 +524,11 @@ extension SettingsView {
            // for its own footer and has no such toggle to describe.
            VStack(alignment: .leading, spacing: 6) {
                Text(Self.controllersFooter)
+                #if os(iOS)
+                if CHHapticEngine.capabilitiesForHardware().supportsHaptics {
+                    Text(Self.deviceRumbleFooter)
+                }
+                #endif
                #if !os(tvOS)
                Text(Self.gamepadUIFooter)
                #endif
@@ -88,6 +88,13 @@ extension SettingsView {
        + "controller (a DualSense keeps adaptive triggers, lightbar, touchpad and motion). "
        + "Applies from the next session."

+    #if os(iOS)
+    static let deviceRumbleFooter =
+        "Rumble on this iPhone plays player 1's rumble on the phone's own Taptic Engine as "
+        + "well — for clip-on controllers that have no rumble motors of their own. Applies "
+        + "from the next session."
+    #endif
+
    #if !os(tvOS)
    static let gamepadUIFooter =
        "When a controller connects, the host list and library switch to a controller-"
@@ -49,12 +49,15 @@ struct SettingsView: View {
    @ObservedObject var gamepads = GamepadManager.shared
    @AppStorage(DefaultsKey.gamepadUIEnabled) var gamepadUIEnabled = true
    @AppStorage(DefaultsKey.autoWake) var autoWakeEnabled = true
+    @AppStorage(DefaultsKey.backgroundKeepAlive) var backgroundKeepAlive = false
+    @AppStorage(DefaultsKey.backgroundTimeoutMinutes) var backgroundTimeoutMinutes = 10
    #if DEBUG && !os(tvOS)
    @State var showControllerTest = false
    #endif
    #if os(iOS)
    @AppStorage(DefaultsKey.pointerCapture) var pointerCapture = true
    @AppStorage(DefaultsKey.touchMode) var touchMode = TouchInputMode.trackpad.rawValue
+    @AppStorage(DefaultsKey.rumbleOnDevice) var rumbleOnDevice = false
    // The sidebar selection drives the detail pane on iPad and the pushed sub-page on iPhone.
    // Width class decides the initial value: nil on iPhone (show the category list first),
    // General on iPad (a two-column layout should never open with an empty detail).
@@ -241,6 +244,7 @@ struct SettingsView: View {
                pointerSection
                compositorSection
                wakeSection
+                keepAliveSection // iOS-only content; empty on tvOS
            }
            .formStyle(.grouped)
            .navigationTitle("General")
@@ -11,32 +11,13 @@
 import Foundation
 import PunktfunkKit
 import SwiftUI
+#if canImport(WidgetKit)
+import WidgetKit
+#endif

-struct StoredHost: Identifiable, Codable, Hashable {
-    var id = UUID()
-    var name: String
-    var address: String
-    var port: UInt16 = 9777
-    /// SHA-256 of the host's certificate, set after the user explicitly trusted it.
-    var pinnedSHA256: Data?
-    /// Last time a streaming session actually started (nil until the first one).
-    var lastConnected: Date?
-    /// Management-API port for the library browser (distinct from the data-plane `port`). Optional
-    /// (NOT a defaulted non-optional) so older saved hosts — whose JSON lacks this key — still
-    /// decode: synthesized Decodable ignores property defaults but treats a missing Optional as
-    /// nil. Resolve via `effectiveMgmtPort`. (Auth is mTLS by the pinned identity — no token.)
-    var mgmtPort: UInt16?
-    /// Wake-on-LAN MAC address(es) of the host's wake-capable NIC(s), each `aa:bb:cc:dd:ee:ff`.
-    /// Learned from the host's mDNS `mac` TXT record while it's awake and persisted here, so the
-    /// client can send a magic packet to wake the host later (when it's asleep and no longer
-    /// advertising). Optional (same forward-compat reason as `mgmtPort`); nil until first learned.
-    var macAddresses: [String]?
-
-    var displayName: String { name.isEmpty ? address : name }
-    var effectiveMgmtPort: UInt16 { mgmtPort ?? punktfunkDefaultMgmtPort }
-    /// Wake-capable, in a form the wake helper accepts (empty when none learned yet).
-    var wakeMacs: [String] { macAddresses ?? [] }
-}
+// `StoredHost` (the model + its JSON codec) now lives in PunktfunkShared so the widget extension
+// can read the same store; PunktfunkKit re-exports it. The discovery-join helpers below stay here
+// because they reference PunktfunkKit's `DiscoveredHost`/`HostDiscovery`.

 extension StoredHost {
    /// True when a live mDNS advert (`DiscoveredHost`) describes THIS saved host — drives the
@@ -86,8 +67,14 @@ final class HostStore: ObservableObject {
    /// never advertises still reads Online. Not persisted (it's live reachability, not config).
    @Published var probedOnline: Set<StoredHost.ID> = []

+    /// The App-Group suite — shared with the Widget/Live-Activity extension so a launcher widget
+    /// sees the same saved hosts. Falls back to `.standard` in an un-entitled process (see
+    /// `AppGroup.defaults`).
+    private let defaults = AppGroup.defaults
+
    init() {
-        if let data = UserDefaults.standard.data(forKey: Self.key),
+        Self.migrateToAppGroupIfNeeded()
+        if let data = defaults.data(forKey: Self.key),
           let decoded = try? JSONDecoder().decode([StoredHost].self, from: data) {
            hosts = decoded
        } else {
@@ -95,6 +82,20 @@ final class HostStore: ObservableObject {
        }
    }

+    /// One-time move of the saved-host JSON from `UserDefaults.standard` (where every build before
+    /// the App Group wrote it) into the shared suite. Idempotent: only fires when the suite has no
+    /// hosts yet but standard does. The old value is LEFT in place — during a staged TestFlight
+    /// rollout an older build still reads `.standard`, so tombstoning it now would hide hosts from
+    /// the not-yet-updated app. Remove the standard copy a release later.
+    private static func migrateToAppGroupIfNeeded() {
+        let suite = AppGroup.defaults
+        let standard = UserDefaults.standard
+        guard suite !== standard else { return } // un-entitled fallback: nothing to migrate
+        guard suite.data(forKey: key) == nil,
+              let legacy = standard.data(forKey: key) else { return }
+        suite.set(legacy, forKey: key)
+    }
+
    func add(_ host: StoredHost) {
        hosts.append(host)
    }
@@ -112,7 +113,7 @@ final class HostStore: ObservableObject {

    func markConnected(_ hostID: UUID) {
        guard let i = hosts.firstIndex(where: { $0.id == hostID }) else { return }
-        hosts[i].lastConnected = Date()
+        hosts[i].lastConnected = Date() // didSet → persist() writes the shared suite + reloads widget
    }

    /// One reachability sweep, driving `probedOnline`: probe every saved host NOT currently
@@ -158,7 +159,17 @@ final class HostStore: ObservableObject {

    private func persist() {
        if let data = try? JSONEncoder().encode(hosts) {
-            UserDefaults.standard.set(data, forKey: Self.key)
+            defaults.set(data, forKey: Self.key)
        }
+        reloadHostsWidget() // the widget reads this store; any change refreshes its timeline
+    }
+
+    /// Ask WidgetKit to rebuild the hosts widget's timeline after any store change (add/remove/pin/
+    /// last-connected). iOS-only and a no-op where WidgetKit is absent; the widget uses
+    /// `.never`-refresh entries and relies on this push.
+    private func reloadHostsWidget() {
+        #if canImport(WidgetKit) && os(iOS)
+        WidgetCenter.shared.reloadTimelines(ofKind: "PunktfunkHosts")
+        #endif
    }
 }
@@ -212,14 +212,18 @@ struct PairSheet: View {
                case .failure(PunktfunkClientError.wrongPIN):
                    errorText = "Wrong PIN — check the host's web console (port 3000) "
                        + "and try again."
+                case .failure(PunktfunkClientError.rejected(let rejection)):
+                    // The host answered and said why (not armed / rate-limited / armed for
+                    // another device) — show that instead of the guessing-game fallback.
+                    errorText = rejection.userMessage
                case .failure(is ClientIdentityStore.IdentityError):
                    errorText = "Can't store this Mac's identity in the Keychain, so the "
                        + "pairing would not survive a relaunch. Unlock the login "
                        + "keychain and try again."
                case .failure:
-                    errorText = "Pairing failed. Is the host reachable, pairing armed "
-                        + "(web console → Pairing), and not mid-session? Retries are "
-                        + "rate-limited to one per 2 seconds."
+                    errorText = "Pairing failed — the host didn't answer. Is it running, "
+                        + "and is this device on the same network (no VPN, no guest-Wi-Fi "
+                        + "isolation)?"
                }
            }
        }
@@ -180,6 +180,23 @@ public final class SessionAudio {
        }
    }

+    /// Background keep-alive: silence the mic uplink while backgrounded (privacy — no room audio
+    /// leaves the device) and restore it on return. Pauses/resumes the capture engine; a no-op when
+    /// there's no uplink (playback-only / tvOS / mic disabled). The audio SESSION stays active for
+    /// background playback, so iOS may keep showing the recording indicator until a full reconfigure
+    /// — this stops the actual capture, which is the privacy-relevant part. Main thread.
+    public func setMicMuted(_ muted: Bool) {
+        stateLock.lock()
+        let capture = captureEngine
+        stateLock.unlock()
+        guard let capture else { return }
+        if muted {
+            capture.pause()
+        } else if !flag.isStopped {
+            try? capture.start()
+        }
+    }
+
    // MARK: - Playback (host → speaker)

    private func startPlayback(speakerUID: String) {
@@ -54,6 +54,12 @@ public func pair(
    switch rc {
    case PUNKTFUNK_STATUS_OK.rawValue: return Data(observed)
    case PUNKTFUNK_STATUS_CRYPTO.rawValue: throw PunktfunkClientError.wrongPIN
-    default: throw PunktfunkClientError.status(rc)
+    default:
+        // A typed host rejection (pairing not armed / rate-limited / armed for another
+        // device) carries its own reason — never report it as a bad PIN or dead network.
+        if let rejection = HostRejection(status: rc) {
+            throw PunktfunkClientError.rejected(rejection)
+        }
+        throw PunktfunkClientError.status(rc)
    }
 }
@@ -11,6 +11,9 @@
 // LaunchSpec schema in `crates/punktfunk-host/src/library.rs`.

 import Foundation
+// `punktfunkDefaultMgmtPort` (and StoredHost/DefaultsKey) now live in PunktfunkShared so the
+// dependency-free widget extension can share them; PunktfunkKit re-exports the module.
+import PunktfunkShared

 /// Cover art URLs (the public Steam CDN for Steam titles, user-supplied for custom entries).
 public struct Artwork: Codable, Hashable, Sendable {
@@ -64,10 +67,6 @@ public enum LibraryError: LocalizedError {
    }
 }

-/// The management API's default port — adjacent to the GameStream block; matches
-/// `mgmt::DEFAULT_PORT` on the host.
-public let punktfunkDefaultMgmtPort: UInt16 = 47990
-
 /// Stateless fetcher for a host's library.
 public enum LibraryClient {
    /// `GET https://<address>:<port>/api/v1/library`, authenticated by **mTLS**: the client
@@ -59,6 +59,68 @@ public enum PunktfunkClientError: Error {
    case wrongPIN
    case closed
    case status(Int32)
+    /// The host deliberately turned the attempt away and said why (its typed QUIC
+    /// application close) — distinct from `.connectFailed` (unreachable/timeout) so the UI
+    /// can show the stated reason instead of blaming the network.
+    case rejected(HostRejection)
+}
+
+/// Why a host turned a connect/pair attempt away — decoded from the
+/// `PUNKTFUNK_STATUS_REJECTED_*` block. Lets the UI say "approve the request on the host"
+/// or "pairing isn't armed" instead of a generic "could not connect".
+public enum HostRejection: Sendable {
+    case pairingNotArmed
+    case pairingBoundToOtherDevice
+    case pairingRateLimited
+    case identityRequired
+    case denied
+    case approvalTimeout
+    case superseded
+    case wireVersionMismatch
+    case busy
+
+    init?(status: Int32) {
+        switch status {
+        case PUNKTFUNK_STATUS_REJECTED_NOT_ARMED.rawValue: self = .pairingNotArmed
+        case PUNKTFUNK_STATUS_REJECTED_BOUND_OTHER.rawValue: self = .pairingBoundToOtherDevice
+        case PUNKTFUNK_STATUS_REJECTED_RATE_LIMITED.rawValue: self = .pairingRateLimited
+        case PUNKTFUNK_STATUS_REJECTED_IDENTITY_REQUIRED.rawValue: self = .identityRequired
+        case PUNKTFUNK_STATUS_REJECTED_DENIED.rawValue: self = .denied
+        case PUNKTFUNK_STATUS_REJECTED_APPROVAL_TIMEOUT.rawValue: self = .approvalTimeout
+        case PUNKTFUNK_STATUS_REJECTED_SUPERSEDED.rawValue: self = .superseded
+        case PUNKTFUNK_STATUS_REJECTED_WIRE_VERSION.rawValue: self = .wireVersionMismatch
+        case PUNKTFUNK_STATUS_REJECTED_BUSY.rawValue: self = .busy
+        default: return nil
+        }
+    }
+
+    /// User-facing sentence — wording shared with the desktop clients.
+    public var userMessage: String {
+        switch self {
+        case .pairingNotArmed:
+            return "Pairing isn't armed on the host — arm it on the host's Pairing page, "
+                + "then try again."
+        case .pairingBoundToOtherDevice:
+            return "The host's pairing window is armed for a different device — arm it "
+                + "for this one."
+        case .pairingRateLimited:
+            return "Too many pairing attempts — wait a couple of seconds and try again."
+        case .identityRequired:
+            return "The host requires pairing — pair this device (PIN or request access) first."
+        case .denied:
+            return "The host declined this device's request."
+        case .approvalTimeout:
+            return "Nobody approved the request on the host in time — approve this device "
+                + "in the host's console or web UI, then request access again."
+        case .superseded:
+            return "A newer request from this device replaced this one — approve the "
+                + "latest request on the host."
+        case .wireVersionMismatch:
+            return "Client and host versions don't match — update both to the same release."
+        case .busy:
+            return "The host is busy with another session."
+        }
+    }
 }

 /// `withCString` over an optional — nil maps to a NULL C pointer.
@@ -196,6 +258,11 @@ public final class PunktfunkConnection {
        /// Nintendo Switch Pro Controller (Linux UHID hid-nintendo hosts): correct Nintendo
        /// glyphs + positional layout on the host side.
        case switchPro = 8
+        /// New Steam Controller (2026, `28DE:1302`), passed through as-is on Linux hosts (raw
+        /// report mirroring; Steam Input is the consumer). Parity only on Apple — GameController
+        /// never surfaces the raw Valve device, so the client can't capture one; exists so the
+        /// resolved type round-trips and name parsing matches the host.
+        case steamController2 = 9

        /// Loose name parsing for env/dev hooks, mirroring the host's
        /// `GamepadPref::from_name`.
@@ -208,6 +275,8 @@ public final class PunktfunkConnection {
            case "dualshock4", "dualshock", "ds4", "ps4": self = .dualShock4
            case "steamdeck", "steam-deck", "deck": self = .steamDeck
            case "steamcontroller", "steam-controller", "steamcon": self = .steamController
+            case "steamcontroller2", "steam-controller-2", "steamcon2", "sc2", "ibex":
+                self = .steamController2
            case "dualsenseedge", "dualsense-edge", "edge", "dsedge": self = .dualSenseEdge
            case "switchpro", "switch-pro", "switch", "procontroller", "pro-controller":
                self = .switchPro
@@ -268,9 +337,15 @@ public final class PunktfunkConnection {
    public private(set) var resolvedAudioChannels: UInt8 = 2

    /// The video codec the host resolved for this session (`Welcome.codec`, `PUNKTFUNK_CODEC_*`):
-    /// `2` = HEVC (default / older host), `1` = H.264, `4` = AV1. Build the decoder from THIS. The
-    /// resolved value honors the client's `preferredCodec` when the host could emit it.
+    /// `2` = HEVC (default / older host), `1` = H.264, `4` = AV1, `8` = PyroWave (only when this
+    /// client opted in). Build the decoder from THIS. The resolved value honors the client's
+    /// `preferredCodec` when the host could emit it.
    public private(set) var resolvedCodec: UInt8 = 2 // PUNKTFUNK_CODEC_HEVC
+
+    /// The session's negotiated wire shard payload (`Welcome.shard_payload`, bytes) — the
+    /// parse-window size for `USER_FLAG_CHUNK_ALIGNED` PyroWave AUs (plan §4.4). Other codecs
+    /// never need it.
+    public private(set) var shardPayload: UInt32 = 1408
    /// The resolved codec as a `VideoCodec` (H.264 / HEVC / AV1) — drives the bitstream framing
    /// (Annex-B NAL parsing vs the AV1 OBU repack).
    public var videoCodec: VideoCodec { VideoCodec(wire: resolvedCodec) }
@@ -312,6 +387,10 @@ public final class PunktfunkConnection {
    ) throws {
        if let pin = pinSHA256, pin.count != 32 { throw PunktfunkClientError.invalidPin }
        var observed = [UInt8](repeating: 0, count: 32)
+        // Why a failed connect failed (PunktfunkStatus): lets a typed host rejection
+        // ("denied in the console", "approval timed out", "host busy") surface as
+        // `.rejected` instead of the undifferentiated `.connectFailed`.
+        var connectStatus: Int32 = 0
        // `videoCaps` advertises decode/present capability (PUNKTFUNK_VIDEO_CAP_10BIT | _HDR): the
        // host upgrades to a 10-bit / BT.2020 PQ stream only when set. 0 = 8-bit BT.709 SDR.
        // `launchID` (a host library id like "steam:570") asks the host to launch that title in
@@ -322,24 +401,29 @@ public final class PunktfunkConnection {
                    withOptionalCString(launchID) { launch in
                        if let pin = pinSHA256 {
                            return pin.withUnsafeBytes { p in
-                                punktfunk_connect_ex7(
+                                punktfunk_connect_ex8(
                                    cs, port, width, height, refreshHz, compositor.rawValue,
                                    gamepad.rawValue, bitrateKbps, videoCaps, audioChannels,
                                    videoCodecs, preferredCodec, launch,
                                    p.bindMemory(to: UInt8.self).baseAddress, &observed,
-                                    cert, key, timeoutMs)
+                                    cert, key, timeoutMs, &connectStatus)
                            }
                        }
-                        return punktfunk_connect_ex7(
+                        return punktfunk_connect_ex8(
                            cs, port, width, height, refreshHz, compositor.rawValue,
                            gamepad.rawValue, bitrateKbps, videoCaps, audioChannels,
                            videoCodecs, preferredCodec, launch,
-                            nil, &observed, cert, key, timeoutMs)
+                            nil, &observed, cert, key, timeoutMs, &connectStatus)
                    }
                }
            }
        }
-        guard handle != nil else { throw PunktfunkClientError.connectFailed }
+        guard handle != nil else {
+            if let rejection = HostRejection(status: connectStatus) {
+                throw PunktfunkClientError.rejected(rejection)
+            }
+            throw PunktfunkClientError.connectFailed
+        }
        hostFingerprint = Data(observed)
        var w: UInt32 = 0, h: UInt32 = 0, hz: UInt32 = 0
        _ = punktfunk_connection_mode(handle, &w, &h, &hz)
@@ -374,6 +458,9 @@ public final class PunktfunkConnection {
        var codec: UInt8 = 2 // PUNKTFUNK_CODEC_HEVC
        _ = punktfunk_connection_codec(handle, &codec)
        resolvedCodec = codec
+        var shard: UInt32 = 1408
+        _ = punktfunk_connection_shard_payload(handle, &shard)
+        shardPayload = shard
    }

    /// A bandwidth speed-test measurement (see `startSpeedTest`). Partial until `done`.
@@ -447,6 +534,23 @@ public final class PunktfunkConnection {
        _ = punktfunk_connection_request_keyframe(h)
    }

+    /// Background-keep-alive video drop (opt-in). While true, both video pumps keep DRAINING
+    /// `nextAU()` (so QUIC flow control and host pacing stay healthy) but DISCARD each AU before any
+    /// VideoToolbox/Metal decode or render — the crash/jetsam-safe way to hold a backgrounded
+    /// session (audio keeps rendering; no GPU work off-screen). Set on `SessionModel.enterBackground`,
+    /// cleared on `exitBackground` (which then requests a fresh IDR; the pump's re-anchor gate
+    /// auto-arms on the resumed frame-index gap). Its own tiny lock — read on the pump thread every
+    /// iteration, written on the main actor; never contends the ABI/plane locks.
+    private let videoDropLock = NSLock()
+    private var videoDropped = false
+    public var isVideoDropped: Bool {
+        videoDropLock.lock(); defer { videoDropLock.unlock() }
+        return videoDropped
+    }
+    public func setVideoDropped(_ dropped: Bool) {
+        videoDropLock.lock(); videoDropped = dropped; videoDropLock.unlock()
+    }
+
    /// Feed each received AU's `frameIndex` (in receive order) so the client recovers from loss with a
    /// cheap reference-frame invalidation instead of always paying for a full IDR. On a forward gap —
    /// a `frameIndex` jump means the intervening frames were lost and the following AUs reference a
@@ -491,6 +595,30 @@ public final class PunktfunkConnection {
        return out
    }

+    /// Report one decoded frame's decode-stage latency, in microseconds (the AU leaving `nextAU`
+    /// through its VideoToolbox output). This feeds the Automatic bitrate controller's decode
+    /// signal — the only one that sees this device's decoder — so the rate is capped at the real
+    /// decode limit instead of climbing to the network link ceiling and choking the decoder. Cheap;
+    /// silently dropped after close. Only worth calling when `wantsDecodeLatency()` is true.
+    public func reportDecodeUs(_ us: UInt32) {
+        abiLock.lock()
+        defer { abiLock.unlock() }
+        guard let h = handle, !closeRequested else { return }
+        _ = punktfunk_connection_report_decode_us(h, us)
+    }
+
+    /// Whether `reportDecodeUs` is worth calling this session: true only when the adaptive-bitrate
+    /// controller is armed (Automatic bitrate, non-PyroWave). Query once — constant for the session
+    /// — and skip the per-frame decode measurement entirely when it's false. False after close.
+    public func wantsDecodeLatency() -> Bool {
+        abiLock.lock()
+        defer { abiLock.unlock() }
+        guard let h = handle, !closeRequested else { return false }
+        var out = false
+        _ = punktfunk_connection_wants_decode_latency(h, &out)
+        return out
+    }
+
    /// The currently active session mode (updated by accepted `requestMode` switches).
    public func currentMode() -> (width: UInt32, height: UInt32, refreshHz: UInt32) {
        abiLock.lock()
@@ -712,6 +840,15 @@ public final class PunktfunkConnection {
    public static let codecH264: UInt8 = UInt8(PUNKTFUNK_CODEC_H264)
    public static let codecHEVC: UInt8 = UInt8(PUNKTFUNK_CODEC_HEVC)
    public static let codecAV1: UInt8 = UInt8(PUNKTFUNK_CODEC_AV1)
+    /// PyroWave (opt-in wired-LAN wavelet codec, 8-bit SDR): the host only ever resolves it
+    /// when the client both advertises the bit AND names it `preferredCodec` — never
+    /// auto-selected. Decoded by the Metal wavelet decoder, not VideoToolbox.
+    public static let codecPyroWave: UInt8 = UInt8(PUNKTFUNK_CODEC_PYROWAVE)
+
+    /// `AccessUnit.flags` bit: the AU is shard-aligned self-delimiting chunks (the wire's
+    /// `USER_FLAG_CHUNK_ALIGNED`, PyroWave datagram-aligned mode §4.4) — walk it
+    /// window-by-window at `shardPayload`. (The C `#define` doesn't import into Swift.)
+    public static let userFlagChunkAligned: UInt32 = 64

    /// Static HDR mastering metadata (SMPTE ST.2086 + content light level) the host sent for an HDR
    /// session. Mirrors the wire/ABI `PunktfunkHdrMeta`; primaries are in ST.2086 **G, B, R** order,
@@ -20,8 +20,10 @@
 // (triggers off, player index unset) and its renderer silenced.

 import Combine
+import CoreHaptics
 import Foundation
 import GameController
+import PunktfunkShared

 public final class GamepadFeedback {
    private let connection: PunktfunkConnection
@@ -50,9 +52,26 @@ public final class GamepadFeedback {
    private let routingLock = NSLock()
    private var rumbleByPad: [UInt8: RumbleRenderer] = [:]

+    /// Opt-in device mirror (`DefaultsKey.rumbleOnDevice`, iPhone only): rumble the host
+    /// addresses to controller 1 (wire pad 0) is ALSO rendered on this device's own Taptic
+    /// Engine — for phone-clip pads that ship without rumble motors, where the phone body is the
+    /// only actuator in the player's hands. Session-scoped (the setting is read once here); nil
+    /// when off or where the device has no haptic actuator.
+    private let deviceRumble: RumbleRenderer?
+
    public init(connection: PunktfunkConnection, manager: GamepadManager) {
        self.connection = connection
        self.manager = manager
+        #if os(iOS)
+        if UserDefaults.standard.bool(forKey: DefaultsKey.rumbleOnDevice),
+            CHHapticEngine.capabilitiesForHardware().supportsHaptics {
+            deviceRumble = RumbleRenderer(policy: .session, actuator: .device)
+        } else {
+            deviceRumble = nil
+        }
+        #else
+        deviceRumble = nil
+        #endif
        // Capture self weakly in the hop too, so the inner sink's weak capture isn't shadowing
        // an implicit strong one — and the subscription (stored on self) never retain-cycles.
        Task { @MainActor [weak self] in
@@ -189,6 +208,7 @@ public final class GamepadFeedback {
            return r
        }
        for r in renderers { r.stop() }
+        deviceRumble?.stop()
        // Drop the subscription and every dead pad's cached feedback — a controller change after
        // teardown must not replay this session's triggers/LEDs.
        Task { @MainActor in
@@ -203,6 +223,10 @@ public final class GamepadFeedback {
    private func routeRumble(pad: UInt8, low: UInt16, high: UInt16, ttlMs: UInt32) {
        let renderer = withRouting { rumbleByPad[pad] }
        renderer?.apply(low: low, high: high, ttlMs: ttlMs)
+        // The opt-in device mirror follows controller 1 unconditionally — the pads it exists for
+        // have no motors (their renderer above no-ops), and mirroring deliberately isn't gated on
+        // that: capability probing can't see a motor-less MFi pad, and the user opted in.
+        if pad == 0 { deviceRumble?.apply(low: low, high: high, ttlMs: ttlMs) }
    }

    private func withRouting<R>(_ body: () -> R) -> R {
@@ -20,6 +20,7 @@
 import Combine
 import Foundation
 import GameController
+import PunktfunkShared

@MainActor
 public final class GamepadManager: ObservableObject {
@@ -6,6 +6,7 @@
 // the two combine without adding a second ObservableObject or an environment key nobody else needs.

 import Foundation
+import PunktfunkShared

 public enum GamepadUIEnvironment {
    /// `enabledSetting` is the user's Settings toggle (`DefaultsKey.gamepadUIEnabled`);
@@ -119,8 +119,19 @@ final class RumbleRenderer: @unchecked Sendable {
        static let manual = Policy(staleAfter: nil)
    }

+    /// Which physical actuator this renderer drives: the forwarded controller's haptics engine
+    /// (the default), or THIS device's own Taptic Engine (`CHHapticEngine()`) — the opt-in
+    /// "rumble on this device" mirror for phone-clip pads that ship without rumble motors.
+    /// Device mode ignores `retarget`'s controller and always renders one combined motor
+    /// (a phone body has a single actuator).
+    enum Actuator {
+        case controller
+        case device
+    }
+
    private let queue = DispatchQueue(label: "io.unom.punktfunk.haptics", qos: .userInteractive)
    private let policy: Policy
+    private let actuator: Actuator

    /// One finite haptic play on a motor: the player plus when (engine timeline) it expires.
    /// A PLAIN pattern player on purpose: the controller haptics server (gamecontrollerd)
@@ -198,8 +209,9 @@ final class RumbleRenderer: @unchecked Sendable {
        ((0, 0), DispatchTime(uptimeNanoseconds: 0))
    #endif

-    init(policy: Policy = .session) {
+    init(policy: Policy = .session, actuator: Actuator = .controller) {
        self.policy = policy
+        self.actuator = actuator
    }

    /// `onBackend`, if given, is invoked (on the internal queue) with a human-readable name of the
@@ -468,6 +480,10 @@ final class RumbleRenderer: @unchecked Sendable {
    /// high = right/light — the Xbox/XInput convention the wire carries); one combined
    /// engine otherwise, driven by whichever amplitude is stronger.
    private func setup() {
+        if actuator == .device {
+            setupDevice()
+            return
+        }
        guard let haptics = controller?.haptics else {
            // No haptics engine at all — an Xbox controller on an OS/firmware that doesn't expose
            // rumble through GameController (works on Android via the standard Vibrator path, but
@@ -517,10 +533,41 @@ final class RumbleRenderer: @unchecked Sendable {
        }
    }

+    /// Device-actuator mode: one combined motor on this device's own Taptic Engine. Only an
+    /// iPhone has one — everything else (iPad, Mac, TV) reports no haptic hardware and latches
+    /// off (nothing to retry; the settings toggle is hidden there anyway, this is the backstop).
+    private func setupDevice() {
+        #if os(iOS)
+        guard CHHapticEngine.capabilitiesForHardware().supportsHaptics else {
+            log.info("rumble: this device has no haptic actuator — device rumble unavailable")
+            broken = true
+            reportHealth("This device has no haptic actuator.")
+            return
+        }
+        do {
+            low = startMotor(try CHHapticEngine(), sharpness: RumbleTuning.sharpnessCombined)
+        } catch {
+            log.warning("rumble: device haptic engine creation failed: \(error, privacy: .public)")
+        }
+        if low == nil {
+            // Same shape as the controller path: haptics exist but the engine couldn't be built
+            // right now — back off and retry, don't latch off.
+            scheduleRetryBackoff()
+        }
+        #else
+        broken = true
+        #endif
+    }
+
    private func makeMotor(
        _ haptics: GCDeviceHaptics, _ locality: GCHapticsLocality, sharpness: Float
    ) -> Motor? {
        guard let engine = haptics.createEngine(withLocality: locality) else { return nil }
+        return startMotor(engine, sharpness: sharpness)
+    }
+
+    /// Configure + start an engine (controller-locality or the device's own) into a [`Motor`].
+    private func startMotor(_ engine: CHHapticEngine, sharpness: Float) -> Motor? {
        // A controller's motors carry no audio, so keep this engine OUT of the app's audio session
        // (the default is to join it). Streaming keeps an AVAudioSession active the whole time;
        // letting a haptics-only engine join it is a needless coupling that can get its
@@ -546,7 +593,7 @@ final class RumbleRenderer: @unchecked Sendable {
            try engine.start()
            return Motor(engine: engine, sharpness: sharpness)
        } catch {
-            log.warning("haptic engine setup failed (\(locality.rawValue, privacy: .public)): \(error, privacy: .public)")
+            log.warning("haptic engine setup failed: \(error, privacy: .public)")
            return nil
        }
    }
@@ -118,3 +118,44 @@ extension InputCapture {
        ]
    #endif
 }
+
+#if os(iOS)
+/// US-layout character → Windows VK for the on-screen keyboard (`StreamLayerUIView`'s
+/// UIKeyInput). Unlike every other key source, `insertText` delivers CHARACTERS, not key
+/// positions, so this is the inverse of a US layout: `shift` means "wrap in VK_LSHIFT so the
+/// host types the shifted symbol". Same contract as `hidToVK`: emit only VKs the host's
+/// vk_to_evdev knows; anything unmapped is dropped by the caller.
+enum SoftKeyMap {
+    static func vk(for ch: Character) -> (vk: UInt32, shift: Bool)? {
+        guard let ascii = ch.asciiValue else { return nil }
+        switch ascii {
+        case UInt8(ascii: "a")...UInt8(ascii: "z"): return (UInt32(ascii) - 0x20, false)
+        case UInt8(ascii: "A")...UInt8(ascii: "Z"): return (UInt32(ascii), true)
+        case UInt8(ascii: "0")...UInt8(ascii: "9"): return (UInt32(ascii), false)
+        case 0x0A, 0x0D: return (0x0D, false) // return
+        case 0x09: return (0x09, false) // tab
+        case 0x20: return (0x20, false) // space
+        default: return symbols[ch]
+        }
+    }
+
+    /// US punctuation, plain and shifted, on the OEM VKs (mirrors `hidToVK`'s OEM block) plus
+    /// the shifted digit row.
+    private static let symbols: [Character: (vk: UInt32, shift: Bool)] = [
+        "-": (0xBD, false), "_": (0xBD, true),
+        "=": (0xBB, false), "+": (0xBB, true),
+        "[": (0xDB, false), "{": (0xDB, true),
+        "]": (0xDD, false), "}": (0xDD, true),
+        "\\": (0xDC, false), "|": (0xDC, true),
+        ";": (0xBA, false), ":": (0xBA, true),
+        "'": (0xDE, false), "\"": (0xDE, true),
+        "`": (0xC0, false), "~": (0xC0, true),
+        ",": (0xBC, false), "<": (0xBC, true),
+        ".": (0xBE, false), ">": (0xBE, true),
+        "/": (0xBF, false), "?": (0xBF, true),
+        "!": (0x31, true), "@": (0x32, true), "#": (0x33, true), "$": (0x34, true),
+        "%": (0x35, true), "^": (0x36, true), "&": (0x37, true), "*": (0x38, true),
+        "(": (0x39, true), ")": (0x30, true),
+    ]
+}
+#endif
@@ -3,7 +3,8 @@
 // identical. Two mouse modes share one gesture vocabulary — tap = left click · two-finger
 // tap = right click · two-finger drag = scroll · tap-then-press-and-drag = held left drag
 // (text selection / window moves) · three-finger tap = cycles the stats overlay tiers
-// (off → compact → normal → detailed, matching Android):
+// (off → compact → normal → detailed, matching Android) · three-finger swipe up/down =
+// summon/dismiss the local soft keyboard for typing on the host (`onKeyboardGesture`):
 //
 //  * trackpad (default): the cursor STAYS PUT on touch-down and moves by the finger's
 //    relative delta with mild acceleration — swipe to nudge, lift and re-swipe to walk it
@@ -18,6 +19,7 @@
 #if os(iOS)
 import Foundation
 import PunktfunkCore
+import PunktfunkShared
 import UIKit

 /// How touchscreen fingers drive the host — persisted under `DefaultsKey.touchMode`, latched
@@ -61,6 +63,9 @@ final class TouchMouse {
        static let accelGain: CGFloat = 0.6
        static let accelSpeedFloor: CGFloat = 0.3
        static let accelMax: CGFloat = 3.0
+        /// Three-finger vertical swipe: the fraction of the view height the centroid must
+        /// travel to summon (up) / dismiss (down) the local soft keyboard.
+        static let keyboardSwipeFraction: CGFloat = 0.10

        /// Acceleration multiplier for a finger speed in physical px per ms.
        static func accel(forSpeed speed: CGFloat) -> CGFloat {
@@ -72,6 +77,9 @@ final class TouchMouse {
    var send: ((PunktfunkInputEvent) -> Void)?
    /// View-space point → host-mode pixels through the letterbox (pointer mode's moves).
    var hostPoint: ((CGPoint) -> StreamLayerUIView.HostPoint?)?
+    /// Three-finger vertical swipe crossed the threshold: `true` = show the local soft
+    /// keyboard (swipe up), `false` = dismiss it (swipe down). Fires at most once per gesture.
+    var onKeyboardGesture: ((Bool) -> Void)?

    /// No gesture in flight (all fingers up) — the view uses this to release its mode latch.
    var isIdle: Bool { !sessionActive && lastPos.isEmpty }
@@ -95,6 +103,11 @@ final class TouchMouse {
    private var carryY: CGFloat = 0
    /// Scroll anchor (centroid) — re-anchored every time a notch fires.
    private var scrollAnchor = CGPoint.zero
+    // Keyboard-swipe state: the 3+-finger centroid anchor (per finger count, like the scroll
+    // anchor) and a once-per-gesture latch.
+    private var kbCount = 0
+    private var kbAnchor = CGPoint.zero
+    private var kbFired = false
    // Tap-drag arming: a quick tap leaves a window in which the next nearby touch drags.
    private var lastTapUp: TimeInterval = 0
    private var lastTapPoint = CGPoint.zero
@@ -114,6 +127,8 @@ final class TouchMouse {
            maxFingers = 0
            moved = false
            scrolling = false
+            kbCount = 0
+            kbFired = false
            // A touch landing just after a quick tap nearby = tap-and-drag: hold the left
            // button for this whole gesture (laptop-trackpad convention).
            dragHeld = first.timestamp - lastTapUp < Tuning.tapDragWindow
@@ -140,8 +155,13 @@ final class TouchMouse {
        for touch in touches where lastPos[ObjectIdentifier(touch)] != nil {
            lastPos[ObjectIdentifier(touch)] = touch.location(in: view)
        }
-        if lastPos.count >= 2 {
+        // Dropping below three fingers forgets the keyboard-swipe anchor, so a 3→2→3 bounce
+        // re-anchors instead of reading the count change as swipe travel.
+        if lastPos.count < 3 { kbCount = 0 }
+        if lastPos.count == 2 {
            scrollByCentroid()
+        } else if lastPos.count >= 3 {
+            keyboardSwipe(in: view)
        } else if !scrolling, let touch = touches.first(where: {
            lastPos[ObjectIdentifier($0)] != nil
        }) {
@@ -208,9 +228,9 @@ final class TouchMouse {

    // MARK: - Per-event work

-    /// Two fingers (or more) → scroll by the centroid delta; never move the cursor. Fires a
-    /// notch per `scrollNotchPt` of pan and re-anchors on fire; finger up scrolls up, finger
-    /// right scrolls right (the host WHEEL(120) convention).
+    /// Two fingers → scroll by the centroid delta; never move the cursor. Fires a notch per
+    /// `scrollNotchPt` of pan and re-anchors on fire; finger up scrolls up, finger right
+    /// scrolls right (the host WHEEL(120) convention).
    private func scrollByCentroid() {
        let n = CGFloat(lastPos.count)
        let cx = lastPos.values.reduce(0) { $0 + $1.x } / n
@@ -233,6 +253,38 @@ final class TouchMouse {
        }
    }

+    /// Three+ fingers → the keyboard swipe, never scroll (the documented vocabulary is
+    /// TWO-finger scroll; 3+ only fell into the scroll path as an accident of its old `>= 2`
+    /// bound). The centroid is anchored per finger count — real fingers never land or lift in
+    /// the same event, so a count change must re-anchor rather than read as travel — and the
+    /// gesture fires at most once, when the vertical travel crosses the threshold: up = show
+    /// the local soft keyboard, down = dismiss it.
+    private func keyboardSwipe(in view: UIView) {
+        let n = CGFloat(lastPos.count)
+        let cx = lastPos.values.reduce(0) { $0 + $1.x } / n
+        let cy = lastPos.values.reduce(0) { $0 + $1.y } / n
+        if lastPos.count != kbCount {
+            kbCount = lastPos.count
+            kbAnchor = CGPoint(x: cx, y: cy)
+        } else {
+            let dy = cy - kbAnchor.y
+            // Real centroid travel disqualifies the tap classification in `ended` (else a
+            // sub-threshold swipe would still fire the three-finger stats tap).
+            if abs(dy) > Tuning.tapSlop || abs(cx - kbAnchor.x) > Tuning.tapSlop { moved = true }
+            if !kbFired, abs(dy) >= view.bounds.height * Tuning.keyboardSwipeFraction {
+                kbFired = true
+                onKeyboardGesture?(dy < 0) // finger up → show, finger down → dismiss
+            }
+        }
+        // Leaving the scroll state stale would read the 3→2 centroid jump as a wheel notch;
+        // clearing it makes a return to two fingers re-anchor fresh. Same for the trackpad's
+        // tracked finger: its prev position froze while 3+ fingers were down, so dropping
+        // straight back to one finger must re-anchor (zero delta), not replay the whole
+        // 3-finger phase as one cursor jump.
+        scrolling = false
+        trackKey = nil
+    }
+
    /// One finger (and the gesture never became a scroll — dropping back from two fingers to
    /// one must not jerk the cursor).
    private func singleFinger(_ touch: UITouch, in view: UIView) {
@@ -0,0 +1,9 @@
+// PunktfunkShared holds what the app AND the widget extension both need — the stored-host model,
+// the settings-key names, the App-Group constant, the deep-link grammar, and the Live Activity
+// attributes — in a module that links neither the Rust core nor the presentation layer.
+//
+// Re-export it so every existing consumer of PunktfunkKit (`import PunktfunkKit`) keeps seeing
+// `StoredHost`, `DefaultsKey`, `punktfunkDefaultMgmtPort`, `DeepLink`, etc. with no call-site churn.
+// (Files INSIDE PunktfunkKit still `import PunktfunkShared` explicitly — Swift imports are
+// file-scoped; the re-export only reaches downstream modules.)
+@_exported import PunktfunkShared
@@ -8,6 +8,7 @@
 // tap, InputCapture's captured-state ⌃⌥⇧S) cycle it directly.

 import Foundation
+import PunktfunkShared

 /// How much of the streaming statistics overlay to show. The raw values are stable on disk —
 /// rename the cases freely, never the strings.
@@ -543,19 +543,24 @@ public enum AV1 {

 extension VideoCodec {
    /// Codec-dispatching format-description refresh: the AV1 path keys on an in-band sequence
-    /// header, the NAL codecs on in-band parameter sets — one call site in each pump.
+    /// header, the NAL codecs on in-band parameter sets — one call site in each pump. PyroWave
+    /// has no CoreMedia representation at all (its pump feeds the Metal wavelet decoder raw).
    public func formatDescription(fromKeyframe au: Data) -> CMVideoFormatDescription? {
-        self == .av1
-            ? AV1.formatDescription(fromKeyframe: au)
-            : AnnexB.formatDescription(fromIDR: au, codec: self)
+        switch self {
+        case .av1: return AV1.formatDescription(fromKeyframe: au)
+        case .pyrowave: return nil
+        default: return AnnexB.formatDescription(fromIDR: au, codec: self)
+        }
    }

    /// Codec-dispatching sample wrap (see `formatDescription(fromKeyframe:)`).
    public func sampleBuffer(
        au: AccessUnit, format: CMVideoFormatDescription
    ) -> CMSampleBuffer? {
-        self == .av1
-            ? AV1.sampleBuffer(au: au, format: format)
-            : AnnexB.sampleBuffer(au: au, format: format, codec: self)
+        switch self {
+        case .av1: return AV1.sampleBuffer(au: au, format: format)
+        case .pyrowave: return nil
+        default: return AnnexB.sampleBuffer(au: au, format: format, codec: self)
+        }
    }
 }
@@ -26,12 +26,18 @@ public enum VideoCodec: Equatable {
    case h264
    case hevc
    case av1
+    /// PyroWave wavelet (opt-in wired-LAN low-latency codec): not a NAL/OBU codec and not
+    /// VideoToolbox-decoded at all — the Metal wavelet decoder consumes the raw AUs
+    /// (Stage2Pipeline's PyroWave pump). Only ever resolved when this client both advertised
+    /// and preferred it.
+    case pyrowave

    /// Resolve from the wire `Welcome.codec` byte (`PUNKTFUNK_CODEC_*`; unknown → HEVC).
    public init(wire: UInt8) {
        switch wire {
        case 0x01: self = .h264 // PUNKTFUNK_CODEC_H264
        case 0x04: self = .av1 // PUNKTFUNK_CODEC_AV1
+        case 0x08: self = .pyrowave // PUNKTFUNK_CODEC_PYROWAVE
        default: self = .hevc // PUNKTFUNK_CODEC_HEVC — the default / older-host codec
        }
    }
@@ -147,8 +153,8 @@ public enum AnnexB {
            sets = [vps, sps, pps]
        case .h264:
            sets = [sps, pps]
-        case .av1:
-            return nil // OBU stream, no parameter-set NALs — handled in AV1.swift, never here
+        case .av1, .pyrowave:
+            return nil // no parameter-set NALs — dispatched in AV1.swift, never reaches here
        }

        var format: CMVideoFormatDescription?
@@ -184,8 +190,8 @@ public enum AnnexB {
                    parameterSetSizes: sizes,
                    nalUnitHeaderLength: 4,
                    formatDescriptionOut: &format)
-            case .av1:
-                break // unreachable — the .av1 arm above already returned
+            case .av1, .pyrowave:
+                break // unreachable — the arm above already returned
            }
        }
        return status == noErr ? format : nil
@@ -149,6 +149,28 @@ fragment float4 pf_frag(VOut in [[stage_in]],
    return float4(sampleRgb(lumaTex, chromaTex, in.uv, csc), 1.0);
 }

+// PyroWave planar SDR: three separate R8 planes (Y full-res, Cb/Cr half-res 4:2:0) from the
+// Metal wavelet decoder — the Metal twin of pf-presenter's planar_csc.frag. Same bicubic luma
+// and left-cosited chroma correction as the biplanar path (chromaUV self-disables at 4:4:4).
+fragment float4 pf_frag_planar(VOut in [[stage_in]],
+                               texture2d<float> lumaTex [[texture(0)]],
+                               texture2d<float> cbTex [[texture(1)]],
+                               texture2d<float> crTex [[texture(2)]],
+                               constant CscUniform& csc [[buffer(0)]]) {
+    constexpr sampler s(filter::linear, address::clamp_to_edge);
+#ifdef PF_BILINEAR_LUMA
+    float lumaY = lumaTex.sample(s, in.uv).r;
+#else
+    float lumaY = catmullRomLuma(lumaTex, s, in.uv);
+#endif
+    float2 cuv = chromaUV(lumaTex, cbTex, in.uv);
+    float3 yuv = float3(lumaY, cbTex.sample(s, cuv).r, crTex.sample(s, cuv).r);
+    float3 rgb = saturate(float3(dot(csc.r0.xyz, yuv) + csc.r0.w,
+                                 dot(csc.r1.xyz, yuv) + csc.r1.w,
+                                 dot(csc.r2.xyz, yuv) + csc.r2.w));
+    return float4(rgb, 1.0);
+}
+
 // HDR: 10-bit P010 / 4:4:4 (BT.2020, PQ-encoded Y′CbCr) → full-range PQ R′G′B′, output as-is —
 // the CAMetalLayer's itur_2100_PQ colour space + edrMetadata tell the compositor the samples are
 // PQ, so it does the PQ→display tone-map. No EOTF here. The rows fold in the exact 10-bit
@@ -215,8 +237,16 @@ public final class MetalVideoPresenter {
    /// tvOS only: the in-shader PQ→SDR tone-map fallback (pf_frag_hdr_tv → bgra8), used whenever
    /// the display is composited without HDR headroom — see `setDisplayHeadroom`. nil elsewhere.
    private let pipelineHDRToneMap: MTLRenderPipelineState?
+    /// PyroWave's 3-plane SDR path (pf_frag_planar → bgra8) — see `renderPlanar`.
+    private let pipelinePlanar: MTLRenderPipelineState
    private var textureCache: CVMetalTextureCache?

+    /// The PyroWave Metal decoder records on the presenter's device + queue: one device means
+    /// decode, CSC and present share textures with zero interop, and one queue means Metal's
+    /// hazard tracking orders a ring-slot rewrite after the render still sampling it.
+    var metalDevice: MTLDevice { device }
+    var metalQueue: MTLCommandQueue { queue }
+
    /// Current layer configuration — switched in `configure(hdr:)` when a frame's HDR-ness differs.
    /// Render-thread confined once the pipeline runs (Stage2Pipeline.start's one pre-thread
    /// `configure` call is ordered before the thread starts, so it doesn't race).
@@ -258,6 +288,7 @@ public final class MetalVideoPresenter {
        let pipelineSDR: MTLRenderPipelineState
        let pipelineHDR: MTLRenderPipelineState
        let pipelineHDRToneMap: MTLRenderPipelineState?
+        let pipelinePlanar: MTLRenderPipelineState
        do {
            // DEBUG A/B lever: PUNKTFUNK_BILINEAR_LUMA=1 compiles the shader with Catmull-Rom OFF
            // (plain bilinear luma) by prepending a #define ahead of the source. Default (unset) is
@@ -292,6 +323,11 @@ public final class MetalVideoPresenter {
            #else
            pipelineHDRToneMap = nil
            #endif
+            let planar = MTLRenderPipelineDescriptor()
+            planar.vertexFunction = vtx
+            planar.fragmentFunction = library.makeFunction(name: "pf_frag_planar")
+            planar.colorAttachments[0].pixelFormat = .bgra8Unorm // PyroWave is 8-bit SDR
+            pipelinePlanar = try device.makeRenderPipelineState(descriptor: planar)
        } catch {
            return nil
        }
@@ -331,12 +367,14 @@ public final class MetalVideoPresenter {

        return MetalVideoPresenter(
            device: device, queue: queue, pipelineSDR: pipelineSDR, pipelineHDR: pipelineHDR,
-            pipelineHDRToneMap: pipelineHDRToneMap, textureCache: textureCache, layer: layer)
+            pipelineHDRToneMap: pipelineHDRToneMap, pipelinePlanar: pipelinePlanar,
+            textureCache: textureCache, layer: layer)
    }

    private init(
        device: MTLDevice, queue: MTLCommandQueue, pipelineSDR: MTLRenderPipelineState,
        pipelineHDR: MTLRenderPipelineState, pipelineHDRToneMap: MTLRenderPipelineState?,
+        pipelinePlanar: MTLRenderPipelineState,
        textureCache: CVMetalTextureCache, layer: CAMetalLayer
    ) {
        self.device = device
@@ -344,6 +382,7 @@ public final class MetalVideoPresenter {
        self.pipelineSDR = pipelineSDR
        self.pipelineHDR = pipelineHDR
        self.pipelineHDRToneMap = pipelineHDRToneMap
+        self.pipelinePlanar = pipelinePlanar
        self.textureCache = textureCache
        self.layer = layer
    }
@@ -514,6 +553,67 @@ public final class MetalVideoPresenter {
                pixelBuffer, plane: 1, format: tenBit ? .rg16Unorm : .rg8Unorm, cache: textureCache)
        else { return false }

+        #if os(tvOS)
+        // HDR splits by the display's headroom (kept in step with the layer by `configure` above):
+        // PQ passthrough into an HDR-composited display, the tone-map shader otherwise.
+        let hdrPipeline = hdrPassthroughActive ? pipelineHDR : (pipelineHDRToneMap ?? pipelineHDR)
+        let pipeline = hdrActive ? hdrPipeline : pipelineSDR
+        #else
+        let pipeline = hdrActive ? pipelineHDR : pipelineSDR
+        #endif
+        let decodedSize = CGSize(
+            width: CVPixelBufferGetWidth(pixelBuffer), height: CVPixelBufferGetHeight(pixelBuffer))
+        return encodePresent(
+            decodedSize: decodedSize, targetFromLayout: targetFromLayout, pipeline: pipeline,
+            presentAtMediaTime: presentAtMediaTime, onPresented: onPresented,
+            // Hold the CVMetalTextures + source pixel buffer (its IOSurface) alive until the GPU
+            // finishes sampling — releasing them at scope exit could free the backing mid-read.
+            keepAlive: [luma, chroma, pixelBuffer]
+        ) { encoder in
+            encoder.setFragmentTexture(CVMetalTextureGetTexture(luma), index: 0)
+            encoder.setFragmentTexture(CVMetalTextureGetTexture(chroma), index: 1)
+            encoder.setFragmentBytes(&csc, length: MemoryLayout<CscUniform>.stride, index: 0)
+        }
+    }
+
+    /// Draw one PyroWave planar frame (three R8 planes off the Metal wavelet decoder) and
+    /// present it. RENDER THREAD, same contract as `render` — PyroWave is 8-bit SDR, so the
+    /// layer always takes the plain SDR config, and the CSC rows arrive precomputed from the
+    /// stream's own sequence-header signaling (no CVPixelBuffer to inspect).
+    @discardableResult
+    func renderPlanar(
+        _ planes: WaveletPlanes,
+        presentAtMediaTime: CFTimeInterval? = nil,
+        onPresented: ((Int64?) -> Void)? = nil
+    ) -> Bool {
+        stagingLock.lock()
+        let targetFromLayout = drawableTarget
+        stagingLock.unlock()
+        configure(hdr: false)
+        var csc = planes.csc
+        return encodePresent(
+            decodedSize: CGSize(width: planes.width, height: planes.height),
+            targetFromLayout: targetFromLayout, pipeline: pipelinePlanar,
+            presentAtMediaTime: presentAtMediaTime, onPresented: onPresented,
+            // The ring textures stay valid by ring depth; retaining them here also pins the
+            // slot's set until the sample completes (mirrors the biplanar keep-alive).
+            keepAlive: [planes.y, planes.cb, planes.cr]
+        ) { encoder in
+            encoder.setFragmentTexture(planes.y, index: 0)
+            encoder.setFragmentTexture(planes.cb, index: 1)
+            encoder.setFragmentTexture(planes.cr, index: 2)
+            encoder.setFragmentBytes(&csc, length: MemoryLayout<CscUniform>.stride, index: 0)
+        }
+    }
+
+    /// The shared present tail of `render`/`renderPlanar`: size the drawable, encode one
+    /// fullscreen triangle with `pipeline` (`bind` supplies the fragment resources), schedule
+    /// the present and the on-glass callback.
+    private func encodePresent(
+        decodedSize: CGSize, targetFromLayout: CGSize, pipeline: MTLRenderPipelineState,
+        presentAtMediaTime: CFTimeInterval?, onPresented: ((Int64?) -> Void)?,
+        keepAlive: [Any], bind: (MTLRenderCommandEncoder) -> Void
+    ) -> Bool {
        // Size the drawable to the LAYER's pixels (its laid-out frame × contentsScale, pushed here by
        // SessionPresenter.layout via `setDrawableTarget` — not read off the layer, whose geometry the
        // main thread owns) so the Catmull-Rom shader performs the decoded→on-screen scale in one pass:
@@ -522,8 +622,6 @@ public final class MetalVideoPresenter {
        // Before the first layout (zero target) fall back to the decoded size. drawableSize does NOT
        // track bounds (defaults to 0), so set it BEFORE nextDrawable; re-set only on a change
        // (layout / Reconfigure / HDR flip — and every frame of a live resize, which is fine).
-        let decodedSize = CGSize(
-            width: CVPixelBufferGetWidth(pixelBuffer), height: CVPixelBufferGetHeight(pixelBuffer))
        let targetSize = (targetFromLayout.width > 0 && targetFromLayout.height > 0)
            ? targetFromLayout : decodedSize
        if layer.drawableSize != targetSize { layer.drawableSize = targetSize }
@@ -542,17 +640,8 @@ public final class MetalVideoPresenter {
        guard let encoder = commandBuffer.makeRenderCommandEncoder(descriptor: pass) else {
            return false
        }
-        #if os(tvOS)
-        // HDR splits by the display's headroom (kept in step with the layer by `configure` above):
-        // PQ passthrough into an HDR-composited display, the tone-map shader otherwise.
-        let hdrPipeline = hdrPassthroughActive ? pipelineHDR : (pipelineHDRToneMap ?? pipelineHDR)
-        encoder.setRenderPipelineState(hdrActive ? hdrPipeline : pipelineSDR)
-        #else
-        encoder.setRenderPipelineState(hdrActive ? pipelineHDR : pipelineSDR)
-        #endif
-        encoder.setFragmentTexture(CVMetalTextureGetTexture(luma), index: 0)
-        encoder.setFragmentTexture(CVMetalTextureGetTexture(chroma), index: 1)
-        encoder.setFragmentBytes(&csc, length: MemoryLayout<CscUniform>.stride, index: 0)
+        encoder.setRenderPipelineState(pipeline)
+        bind(encoder)
        encoder.drawPrimitives(type: .triangle, vertexStart: 0, vertexCount: 3)
        encoder.endEncoding()
        if let onPresented {
@@ -580,9 +669,8 @@ public final class MetalVideoPresenter {
        } else {
            commandBuffer.present(drawable)
        }
-        // Hold the CVMetalTextures + source pixel buffer (its IOSurface) alive until the GPU finishes
-        // sampling — releasing them at scope exit could free the backing mid-read.
-        commandBuffer.addCompletedHandler { _ in _ = (luma, chroma, pixelBuffer) }
+        // Keep the bound sources alive until the GPU finishes sampling (see the callers).
+        commandBuffer.addCompletedHandler { _ in _ = keepAlive }
        commandBuffer.commit()
        return true
    }
@@ -0,0 +1,604 @@
+// PyroWave native Metal decoder — the Apple twin of pf-client-core's Vulkan decoder
+// (crates/pf-client-core/src/video_pyrowave.rs), reimplemented on the presenter's own MTLDevice
+// so decode + CSC + present share one device with zero interop (design/pyrowave-codec-plan.md
+// §4.7). No upstream C/C++ ships in the app: the bitstream parse below reimplements
+// pyrowave_decoder.cpp's push_packet/decode_packet walk, and the two compute kernels
+// (MetalWaveletShaders.swift) are hand-ported from the vendored GLSL. The §4.2 upstream pin
+// covers this hand-port: a vendored bump means re-diffing two decode shaders and the two 8-byte
+// header structs, and it is already a protocol-version event.
+//
+// Wire shape (all fixed by the host encoder, punktfunk-host encode/linux/pyrowave.rs):
+// • One AU = one frame = a self-delimiting stream of packets. Each packet is one 32x32
+//   coefficient block for one (component, level, band), self-sized by its 8-byte
+//   BitstreamHeader; a per-frame START_OF_FRAME sequence header carries dims + total block
+//   count + the VUI bits (chroma 4:2:0, BT.709/BT.2020, limited/full).
+// • With `USER_FLAG_CHUNK_ALIGNED` (Phase 4) the AU is a whole number of `shard_payload`-sized
+//   windows, each 4-byte-prefixed (used-len u16 LE + kind u16 LE): kind 0 = whole packets,
+//   1/2/3 = FRAG chain for a packet bigger than one window. A missing shard of a partial frame
+//   arrives as an all-zero window (used = 0) → skipped, its blocks reconstruct as zeros
+//   (localized blur, the Phase-4 design intent). The reassembler enables partial delivery
+//   core-side automatically for PyroWave sessions.
+// • Decode acceptance mirrors upstream decode_is_ready(allow_partial=true): a frame with no
+//   SOF or with no more than half its blocks is dropped rather than decoded to garbage.
+//
+// GPU structure per frame (mirroring pyrowave_decoder.cpp's barriers): one concurrent compute
+// encoder with all ~42 dequant dispatches (each writes a distinct band layer — no intra-stage
+// hazards), then one concurrent encoder per iDWT level (5) — encoder boundaries provide the
+// write→sampled-read synchronization the Vulkan version expresses as pipeline barriers. The
+// output is a ring of 4 plane sets (Y full-res + Cb/Cr half-res R8Unorm); ring depth plus
+// same-queue hazard tracking keeps a set alive while the presenter still samples it (the same
+// scheme as the Vulkan client's ring).
+
+#if canImport(Metal)
+import Foundation
+import Metal
+import os
+
+private let waveletLog = Logger(subsystem: "io.unom.punktfunk", category: "pyrowave")
+
+/// The per-(component, level, band) 32x32-block table — the exact Swift port of
+/// `WaveletBuffers::init_block_meta` (pyrowave_common.cpp): the walk order (level 4→0,
+/// component 0→2 skipping level-0 chroma in 4:2:0, band (level==4 ? 0 : 1)→3) DEFINES the
+/// global `block_index` space the wire packets address, so it must match the encoder exactly.
+struct WaveletLayout {
+    static let decompositionLevels = 5
+    static let alignment = 32
+    static let minimumImageSize = 128
+
+    let width: Int
+    let height: Int
+    let alignedWidth: Int
+    let alignedHeight: Int
+    /// blockMeta[component][level][band] = (blockOffset32x32, blockStride32x32); -1 offset =
+    /// band not coded (level-0 chroma in 4:2:0).
+    let blockMeta: [[[(offset: Int, stride: Int)]]]
+    let blockCount32: Int
+
+    /// Band-image extent at `level` — mip `level` of the (aligned/2)-sized coefficient image.
+    /// Exact halving: the aligned dims are 32-aligned, so /2 is 16-aligned and survives 4 shifts.
+    func levelWidth(_ level: Int) -> Int { (alignedWidth / 2) >> level }
+    func levelHeight(_ level: Int) -> Int { (alignedHeight / 2) >> level }
+
+    init(width: Int, height: Int) {
+        self.width = width
+        self.height = height
+        let align = { (v: Int) in
+            max((v + Self.alignment - 1) & ~(Self.alignment - 1), Self.minimumImageSize)
+        }
+        alignedWidth = align(width)
+        alignedHeight = align(height)
+
+        var meta = [[[(offset: Int, stride: Int)]]](
+            repeating: [[(offset: Int, stride: Int)]](
+                repeating: [(offset: Int, stride: Int)](repeating: (-1, 0), count: 4),
+                count: Self.decompositionLevels),
+            count: 3)
+        var count32 = 0
+        let aw = alignedWidth
+        let ah = alignedHeight
+        for level in stride(from: Self.decompositionLevels - 1, through: 0, by: -1) {
+            for component in 0..<3 {
+                if level == 0 && component != 0 { continue } // 4:2:0: no top-level chroma
+                for band in (level == Self.decompositionLevels - 1 ? 0 : 1)..<4 {
+                    let levelW = (aw / 2) >> level
+                    let levelH = (ah / 2) >> level
+                    let blocksX8 = (levelW + 7) / 8
+                    let blocksY8 = (levelH + 7) / 8
+                    let blocksX32 = (levelW + 31) / 32
+                    meta[component][level][band] = (count32, blocksX32)
+                    // accumulate_block_mapping's 32x32 count.
+                    count32 += ((blocksX8 + 3) / 4) * ((blocksY8 + 3) / 4)
+                }
+            }
+        }
+        blockMeta = meta
+        blockCount32 = count32
+    }
+}
+
+/// One parsed frame, CPU side: the per-block payload offset table + the flat payload words the
+/// dequant kernel consumes (packet words INCLUDING each 8-byte header, as upstream uploads
+/// them), plus the sequence header's facts.
+struct ParsedWaveletFrame {
+    var layout: WaveletLayout
+    /// Per 32x32 block: u32 word offset into `payload`, or UInt32.max = block missing.
+    var offsets: [UInt32]
+    var payload: [UInt32]
+    var totalBlocks: Int
+    var decodedBlocks: Int
+    /// VUI bits from the sequence header (BitstreamSequenceHeader).
+    var bt2020: Bool
+    var fullRange: Bool
+
+    /// The frame's Y′CbCr→RGB signal for the presenter's planar CSC. PyroWave today is always
+    /// BT.709 limited (the host's fixed contract), but the sequence header signals it, so honor
+    /// what it says.
+    var cscSignal: CscRows.Signal {
+        CscRows.Signal(matrix: bt2020 ? 9 : 1, fullRange: fullRange)
+    }
+}
+
+enum WaveletBitstream {
+    /// Window kinds of the chunk-aligned framing (host WIN_* constants).
+    private static let winPacked: UInt16 = 0
+    private static let winFragFirst: UInt16 = 1
+    private static let winFragCont: UInt16 = 2
+    private static let winFragLast: UInt16 = 3
+
+    /// Parse one AU into the dequant kernel's inputs. `windowSize` > 0 with `chunkAligned`
+    /// walks the Phase-4 shard-window framing first; otherwise the AU is one packet stream.
+    /// nil = drop the frame (malformed, no SOF, or not enough blocks survived loss to be worth
+    /// decoding — upstream's `decoded_blocks > total/2` partial rule).
+    static func parse(au: Data, chunkAligned: Bool, windowSize: Int) -> ParsedWaveletFrame? {
+        var state = ParseState()
+        let ok = au.withUnsafeBytes { (raw: UnsafeRawBufferPointer) -> Bool in
+            guard let base = raw.baseAddress?.assumingMemoryBound(to: UInt8.self) else {
+                return false
+            }
+            let count = raw.count
+            if chunkAligned, windowSize >= 8 {
+                // Whole windows only; a trailing partial window would be a framing bug.
+                guard count % windowSize == 0 else { return false }
+                var frag: [UInt8] = []
+                var fragLive = false
+                var pos = 0
+                while pos < count {
+                    let win = UnsafeBufferPointer(start: base + pos, count: windowSize)
+                    pos += windowSize
+                    let used = Int(win[0]) | (Int(win[1]) << 8)
+                    let kind = UInt16(win[2]) | (UInt16(win[3]) << 8)
+                    // A zeroed (missing) shard or an overrun drops the window AND breaks any
+                    // fragment chain riding across it (mirrors video_pyrowave.rs push_window).
+                    guard used > 0, 4 + used <= windowSize else {
+                        frag.removeAll(keepingCapacity: true)
+                        fragLive = false
+                        continue
+                    }
+                    let body = UnsafeBufferPointer(start: win.baseAddress! + 4, count: used)
+                    switch kind {
+                    case winPacked:
+                        frag.removeAll(keepingCapacity: true)
+                        fragLive = false
+                        guard state.pushPackets(body) else { return false }
+                    case winFragFirst:
+                        frag.removeAll(keepingCapacity: true)
+                        frag.append(contentsOf: body)
+                        fragLive = true
+                    case winFragCont:
+                        if fragLive { frag.append(contentsOf: body) }
+                    case winFragLast:
+                        if fragLive {
+                            frag.append(contentsOf: body)
+                            let ok = frag.withUnsafeBufferPointer { state.pushPackets($0) }
+                            guard ok else { return false }
+                        }
+                        frag.removeAll(keepingCapacity: true)
+                        fragLive = false
+                    default:
+                        frag.removeAll(keepingCapacity: true)
+                        fragLive = false
+                    }
+                }
+                return true
+            }
+            return state.pushPackets(UnsafeBufferPointer(start: base, count: count))
+        }
+        guard ok, let frame = state.finish() else { return nil }
+        // Upstream decode_is_ready(allow_partial=true): with no SOF the frame is undecodable;
+        // at half the blocks or fewer it is presumed garbage.
+        guard frame.totalBlocks > 0, frame.decodedBlocks > frame.totalBlocks / 2 else {
+            return nil
+        }
+        return frame
+    }
+
+    /// Streaming packet-walk state (pyrowave_decoder.cpp push_packet + decode_packet). The
+    /// SOF sequence header arrives first in every host AU, which fixes the dims → layout →
+    /// offset-table size before any coefficient packet lands; a coefficient packet before the
+    /// SOF (its window was lost) is skipped — its block just stays missing.
+    private struct ParseState {
+        var layout: WaveletLayout?
+        var offsets: [UInt32] = []
+        var payload: [UInt32] = []
+        var totalBlocks = 0
+        var decodedBlocks = 0
+        var bt2020 = false
+        var fullRange = false
+        var sawSOF = false
+
+        mutating func pushPackets(_ buf: UnsafeBufferPointer<UInt8>) -> Bool {
+            guard let base = buf.baseAddress else { return true }
+            var pos = 0
+            let count = buf.count
+            while count - pos >= 8 {
+                let word0 = loadWord(base, pos)
+                let word1 = loadWord(base, pos + 4)
+                let extended = (word0 >> 31) & 1
+                if extended != 0 {
+                    // BitstreamSequenceHeader: w-1[0:14] h-1[14:28] seq[28:31] ext[31];
+                    // total[0:24] code[24:26] chroma[26] prim[27] trc[28] mtx[29] range[30]
+                    // siting[31].
+                    let code = (word1 >> 24) & 0x3
+                    guard code == 0 else { return false } // only START_OF_FRAME is defined
+                    let chromaRes = (word1 >> 26) & 1
+                    guard chromaRes == 0 else { return false } // host contract: 4:2:0
+                    let w = Int(word0 & 0x3fff) + 1
+                    let h = Int((word0 >> 14) & 0x3fff) + 1
+                    guard w >= 2, h >= 2, w % 2 == 0, h % 2 == 0 else { return false }
+                    if sawSOF {
+                        // One frame, one geometry — a second SOF must agree.
+                        guard layout?.width == w, layout?.height == h else { return false }
+                    } else {
+                        sawSOF = true
+                        let l = WaveletLayout(width: w, height: h)
+                        layout = l
+                        offsets = [UInt32](repeating: .max, count: l.blockCount32)
+                        payload.reserveCapacity(64 * 1024 / 4)
+                        totalBlocks = Int(word1 & 0xff_ffff)
+                        bt2020 = (word1 >> 29) & 1 != 0
+                        fullRange = (word1 >> 30) & 1 == 0 // YCBCR_RANGE_FULL = 0
+                    }
+                    pos += 8
+                    continue
+                }
+                // BitstreamHeader: ballot[0:16] payload_words[16:28] seq[28:31] ext[31];
+                // quant_code[0:8] block_index[8:32]. payload_words counts u32s INCLUDING the
+                // 8-byte header.
+                let payloadWords = Int((word0 >> 16) & 0xfff)
+                guard payloadWords >= 2, pos + payloadWords * 4 <= count else { return false }
+                let blockIndex = Int(word1 >> 8)
+                if let layout, blockIndex < layout.blockCount32 {
+                    // First write wins (duplicate packets are ignored, like upstream).
+                    if offsets[blockIndex] == .max {
+                        offsets[blockIndex] = UInt32(payload.count)
+                        decodedBlocks += 1
+                        payload.reserveCapacity(payload.count + payloadWords)
+                        for w in 0..<payloadWords {
+                            payload.append(loadWord(base, pos + w * 4))
+                        }
+                    }
+                } else if layout != nil {
+                    return false // out-of-bounds block index — corrupt stream
+                }
+                // No layout yet (SOF lost): skip the packet, the block stays missing.
+                pos += payloadWords * 4
+            }
+            // In the windowed framing, `used` delimits exactly; dense AUs must also consume
+            // fully (upstream errors on trailing bytes).
+            return pos == count
+        }
+
+        private func loadWord(_ base: UnsafePointer<UInt8>, _ offset: Int) -> UInt32 {
+            UInt32(base[offset])
+                | (UInt32(base[offset + 1]) << 8)
+                | (UInt32(base[offset + 2]) << 16)
+                | (UInt32(base[offset + 3]) << 24)
+        }
+
+        func finish() -> ParsedWaveletFrame? {
+            guard let layout else { return nil }
+            return ParsedWaveletFrame(
+                layout: layout, offsets: offsets, payload: payload,
+                totalBlocks: totalBlocks, decodedBlocks: decodedBlocks,
+                bt2020: bt2020, fullRange: fullRange)
+        }
+    }
+}
+
+/// One decoded frame's output planes, handed to the presenter's planar render path. The
+/// textures belong to the decoder's ring — ring depth (4) plus same-queue hazard tracking keep
+/// them valid while referenced. Public because it rides inside `ReadyImage`.
+public struct WaveletPlanes: @unchecked Sendable {
+    public let y: MTLTexture
+    public let cb: MTLTexture
+    public let cr: MTLTexture
+    public let csc: CscUniform
+    public var width: Int { y.width }
+    public var height: Int { y.height }
+}
+
+public final class MetalWaveletDecoder {
+    /// Matches the Vulkan client's ring: deep enough that a slot is never rewritten while the
+    /// presenter still samples it in practice; same-queue hazard tracking is the hard backstop.
+    private static let ringDepth = 4
+
+    /// Device-capability gate for advertisement (SessionModel) and the settings picker: the
+    /// dequant kernel needs simdgroup prefix sums with its 16 header lanes inside one
+    /// simdgroup, so compile the real kernels once and check the pipeline facts. Apple6 (A13)
+    /// and every Mac2 device pass the family check; the compile probe is authoritative.
+    public static let supported: Bool = {
+        guard let device = MTLCreateSystemDefaultDevice() else { return false }
+        guard device.supportsFamily(.apple6) || device.supportsFamily(.mac2) else { return false }
+        do {
+            let lib = try device.makeLibrary(source: waveletShaderSource, options: nil)
+            guard let dequant = lib.makeFunction(name: "wavelet_dequant") else { return false }
+            let p = try device.makeComputePipelineState(function: dequant)
+            var shift = false
+            let fc = MTLFunctionConstantValues()
+            fc.setConstantValue(&shift, type: .bool, index: 0)
+            _ = try lib.makeFunction(name: "idwt", constantValues: fc)
+            return p.threadExecutionWidth >= 16 && p.maxTotalThreadsPerThreadgroup >= 128
+        } catch {
+            waveletLog.info("pyrowave probe: kernels rejected (\(error, privacy: .public))")
+            return false
+        }
+    }()
+
+    private let device: MTLDevice
+    private let queue: MTLCommandQueue
+    private let dequantPipeline: MTLComputePipelineState
+    private let idwtPipeline: MTLComputePipelineState
+    private let idwtShiftPipeline: MTLComputePipelineState
+    private let mirrorSampler: MTLSamplerState
+
+    // Size-dependent state, rebuilt when the SOF dims change (this is also the mid-stream
+    // Reconfigure/resize path — the wavelet decoder is fixed-size per geometry).
+    private var layout: WaveletLayout?
+    /// coefficients[component][level]: 4-slice R16Float (levels 0–1) / R32Float (levels 2–4)
+    /// texture2d_array — the band images (precision-1 split, see MetalWaveletShaders).
+    private var coefficients: [[MTLTexture]] = []
+    /// llViews[component][level]: slice-0 (LL band) 2D write view of `coefficients` — the iDWT
+    /// output target chaining level L+1 into level L.
+    private var llViews: [[MTLTexture]] = []
+
+    private struct Slot {
+        var y: MTLTexture
+        var cb: MTLTexture
+        var cr: MTLTexture
+        var offsets: MTLBuffer
+        var payload: MTLBuffer
+    }
+
+    private var slots: [Slot] = []
+    private var nextSlot = 0
+
+    /// The current geometry (from the last SOF that built the resources) — the pump reports
+    /// decoded-size changes to the resize overlay from this. PUMP THREAD.
+    var decodedSize: (width: Int, height: Int)? {
+        layout.map { ($0.width, $0.height) }
+    }
+
+    /// The pump thread owns `decode`; everything mutable is confined to it.
+    init?(device: MTLDevice, queue: MTLCommandQueue) {
+        self.device = device
+        self.queue = queue
+        do {
+            let lib = try device.makeLibrary(source: waveletShaderSource, options: nil)
+            guard let dequantFn = lib.makeFunction(name: "wavelet_dequant") else { return nil }
+            dequantPipeline = try device.makeComputePipelineState(function: dequantFn)
+            var shift = false
+            let fcOff = MTLFunctionConstantValues()
+            fcOff.setConstantValue(&shift, type: .bool, index: 0)
+            idwtPipeline = try device.makeComputePipelineState(
+                function: try lib.makeFunction(name: "idwt", constantValues: fcOff))
+            shift = true
+            let fcOn = MTLFunctionConstantValues()
+            fcOn.setConstantValue(&shift, type: .bool, index: 0)
+            idwtShiftPipeline = try device.makeComputePipelineState(
+                function: try lib.makeFunction(name: "idwt", constantValues: fcOn))
+        } catch {
+            waveletLog.error("pyrowave: pipeline build failed (\(error, privacy: .public))")
+            return nil
+        }
+        guard dequantPipeline.threadExecutionWidth >= 16,
+              dequantPipeline.maxTotalThreadsPerThreadgroup >= 128
+        else { return nil }
+        // Upstream's mirror_repeat_sampler: mirrored repeat, NEAREST everything, normalized
+        // coords — the idwt gather footprint + coordinate nudge depend on exactly this.
+        let samp = MTLSamplerDescriptor()
+        samp.sAddressMode = .mirrorRepeat
+        samp.tAddressMode = .mirrorRepeat
+        samp.minFilter = .nearest
+        samp.magFilter = .nearest
+        samp.mipFilter = .notMipmapped
+        samp.normalizedCoordinates = true
+        guard let sampler = device.makeSamplerState(descriptor: samp) else { return nil }
+        mirrorSampler = sampler
+    }
+
+    /// Decode one AU. Synchronous CPU parse + async GPU decode: returns false when the frame
+    /// was dropped (malformed / SOF lost / not enough blocks); on true, `completion` fires on a
+    /// Metal callback thread once the planes are decoded (nil = the GPU pass errored).
+    /// PUMP THREAD only.
+    func decode(
+        au: Data, chunkAligned: Bool, windowSize: Int,
+        completion: @escaping @Sendable (WaveletPlanes?) -> Void
+    ) -> Bool {
+        guard
+            let frame = WaveletBitstream.parse(
+                au: au, chunkAligned: chunkAligned, windowSize: windowSize)
+        else { return false }
+
+        if layout?.width != frame.layout.width || layout?.height != frame.layout.height {
+            guard rebuild(layout: frame.layout) else { return false }
+        }
+        guard let layout, !slots.isEmpty else { return false }
+
+        var slot = slots[nextSlot]
+        // Grow the payload buffer to the frame (+16-byte zeroed guard: the kernel's 64-bit
+        // sign-window load and eager plane-byte prefetch may read past the payload end —
+        // upstream pads its Vulkan buffer for exactly this).
+        let payloadBytes = frame.payload.count * 4
+        if slot.payload.length < payloadBytes + 16 {
+            guard
+                let grown = device.makeBuffer(
+                    length: max(64 * 1024, (payloadBytes + 16) * 2), options: .storageModeShared)
+            else { return false }
+            slot.payload = grown
+            slots[nextSlot] = slot
+        }
+        frame.offsets.withUnsafeBytes { src in
+            slot.offsets.contents().copyMemory(
+                from: src.baseAddress!, byteCount: min(src.count, slot.offsets.length))
+        }
+        frame.payload.withUnsafeBytes { src in
+            slot.payload.contents().copyMemory(from: src.baseAddress!, byteCount: src.count)
+        }
+        memset(slot.payload.contents() + payloadBytes, 0, 16)
+
+        guard let cmd = queue.makeCommandBuffer() else { return false }
+
+        // Stage 1: dequant — every (component, level, band) block grid in one concurrent
+        // encoder (each dispatch writes its own band layer; no intra-stage hazards, exactly
+        // like the barrier-free Vulkan dispatch loop).
+        guard let dequant = cmd.makeComputeCommandEncoder(dispatchType: .concurrent) else {
+            return false
+        }
+        dequant.label = "pyrowave dequant"
+        dequant.setComputePipelineState(dequantPipeline)
+        dequant.setBuffer(slot.offsets, offset: 0, index: 0)
+        dequant.setBuffer(slot.payload, offset: 0, index: 1)
+        for level in 0..<WaveletLayout.decompositionLevels {
+            for component in 0..<3 {
+                if level == 0 && component != 0 { continue } // 4:2:0
+                for band in (level == WaveletLayout.decompositionLevels - 1 ? 0 : 1)..<4 {
+                    let meta = layout.blockMeta[component][level][band]
+                    let w = layout.levelWidth(level)
+                    let h = layout.levelHeight(level)
+                    var regs = DequantRegisters(
+                        resolution: SIMD2(Int32(w), Int32(h)),
+                        outputLayer: Int32(band),
+                        blockOffset32x32: Int32(meta.offset),
+                        blockStride32x32: Int32(meta.stride))
+                    dequant.setTexture(coefficients[component][level], index: 0)
+                    dequant.setBytes(
+                        &regs, length: MemoryLayout<DequantRegisters>.stride, index: 2)
+                    dequant.dispatchThreadgroups(
+                        MTLSize(width: (w + 31) / 32, height: (h + 31) / 32, depth: 1),
+                        threadsPerThreadgroup: MTLSize(width: 128, height: 1, depth: 1))
+                }
+            }
+        }
+        dequant.endEncoding()
+
+        // Stage 2: iDWT, coarsest level in — one encoder per level; the encoder boundary is
+        // the write→sampled-read barrier chaining each level's LL into the next.
+        for inputLevel in stride(from: WaveletLayout.decompositionLevels - 1, through: 0, by: -1) {
+            guard let idwt = cmd.makeComputeCommandEncoder(dispatchType: .concurrent) else {
+                return false
+            }
+            idwt.label = "pyrowave idwt L\(inputLevel)"
+            idwt.setSamplerState(mirrorSampler, index: 0)
+            // Resolution rides TRANSPOSED (the kernel transposes on load and store).
+            let rx = layout.levelHeight(inputLevel)
+            let ry = layout.levelWidth(inputLevel)
+            var regs = IdwtRegisters(
+                resolution: SIMD2(Int32(rx), Int32(ry)),
+                invResolution: SIMD2(1.0 / Float(rx), 1.0 / Float(ry)))
+            idwt.setBytes(&regs, length: MemoryLayout<IdwtRegisters>.stride, index: 0)
+            let grid = MTLSize(width: (rx + 15) / 16, height: (ry + 15) / 16, depth: 1)
+            let group = MTLSize(width: 64, height: 1, depth: 1)
+            if inputLevel == 0 {
+                // 4:2:0: the final full-res pass is luma only (chroma finished at level 1).
+                idwt.setComputePipelineState(idwtShiftPipeline)
+                idwt.setTexture(coefficients[0][0], index: 0)
+                idwt.setTexture(slot.y, index: 1)
+                idwt.dispatchThreadgroups(grid, threadsPerThreadgroup: group)
+            } else {
+                for component in 0..<3 {
+                    idwt.setTexture(coefficients[component][inputLevel], index: 0)
+                    if component != 0 && inputLevel == 1 {
+                        // 4:2:0 chroma emits its final half-res plane one level early.
+                        idwt.setComputePipelineState(idwtShiftPipeline)
+                        idwt.setTexture(component == 1 ? slot.cb : slot.cr, index: 1)
+                    } else {
+                        idwt.setComputePipelineState(idwtPipeline)
+                        idwt.setTexture(llViews[component][inputLevel - 1], index: 1)
+                    }
+                    idwt.dispatchThreadgroups(grid, threadsPerThreadgroup: group)
+                }
+            }
+            idwt.endEncoding()
+        }
+
+        let planes = WaveletPlanes(
+            y: slot.y, cb: slot.cb, cr: slot.cr,
+            csc: CscRows.rows(frame.cscSignal, depth: 8, msbPacked: false))
+        cmd.addCompletedHandler { buffer in
+            completion(buffer.error == nil ? planes : nil)
+        }
+        cmd.commit()
+        nextSlot = (nextSlot + 1) % Self.ringDepth
+        return true
+    }
+
+    /// (Re)allocate every size-dependent resource for `layout`'s geometry. Also the mid-stream
+    /// resize path: a Reconfigure shows up here as new SOF dims.
+    private func rebuild(layout newLayout: WaveletLayout) -> Bool {
+        waveletLog.info(
+            "pyrowave: building decoder \(newLayout.width)x\(newLayout.height) (aligned \(newLayout.alignedWidth)x\(newLayout.alignedHeight), \(newLayout.blockCount32) blocks)")
+        var coeff: [[MTLTexture]] = []
+        var lls: [[MTLTexture]] = []
+        for component in 0..<3 {
+            var perLevel: [MTLTexture] = []
+            var perLevelLL: [MTLTexture] = []
+            for level in 0..<WaveletLayout.decompositionLevels {
+                let desc = MTLTextureDescriptor()
+                desc.textureType = .type2DArray
+                desc.arrayLength = 4
+                // Upstream precision 1: fp16 storage for the two finest levels, fp32 for the
+                // coarse levels whose values feed every later reconstruction step.
+                desc.pixelFormat = level < 2 ? .r16Float : .r32Float
+                desc.width = newLayout.levelWidth(level)
+                desc.height = newLayout.levelHeight(level)
+                desc.usage = [.shaderRead, .shaderWrite]
+                desc.storageMode = .private
+                guard let tex = device.makeTexture(descriptor: desc) else { return false }
+                tex.label = "pyrowave coeff c\(component) L\(level)"
+                guard
+                    let ll = tex.makeTextureView(
+                        pixelFormat: desc.pixelFormat, textureType: .type2D,
+                        levels: 0..<1, slices: 0..<1)
+                else { return false }
+                ll.label = "pyrowave LL c\(component) L\(level)"
+                perLevel.append(tex)
+                perLevelLL.append(ll)
+            }
+            coeff.append(perLevel)
+            lls.append(perLevelLL)
+        }
+
+        var newSlots: [Slot] = []
+        for i in 0..<Self.ringDepth {
+            let plane = { (w: Int, h: Int, name: String) -> MTLTexture? in
+                let desc = MTLTextureDescriptor.texture2DDescriptor(
+                    pixelFormat: .r8Unorm, width: w, height: h, mipmapped: false)
+                desc.usage = [.shaderRead, .shaderWrite]
+                desc.storageMode = .private
+                let t = self.device.makeTexture(descriptor: desc)
+                t?.label = name
+                return t
+            }
+            guard
+                let y = plane(newLayout.width, newLayout.height, "pyrowave Y[\(i)]"),
+                let cb = plane(newLayout.width / 2, newLayout.height / 2, "pyrowave Cb[\(i)]"),
+                let cr = plane(newLayout.width / 2, newLayout.height / 2, "pyrowave Cr[\(i)]"),
+                let offsets = device.makeBuffer(
+                    length: max(newLayout.blockCount32 * 4, 4), options: .storageModeShared),
+                let payload = device.makeBuffer(length: 64 * 1024, options: .storageModeShared)
+            else { return false }
+            newSlots.append(Slot(y: y, cb: cb, cr: cr, offsets: offsets, payload: payload))
+        }
+
+        coefficients = coeff
+        llViews = lls
+        slots = newSlots
+        nextSlot = 0
+        layout = newLayout
+        return true
+    }
+
+    // MSL-side layouts (MetalWaveletShaders.swift) — keep in lockstep.
+    private struct DequantRegisters {
+        var resolution: SIMD2<Int32>
+        var outputLayer: Int32
+        var blockOffset32x32: Int32
+        var blockStride32x32: Int32
+    }
+
+    private struct IdwtRegisters {
+        var resolution: SIMD2<Int32>
+        var invResolution: SIMD2<Float>
+    }
+}
+#endif
@@ -0,0 +1,551 @@
+// PyroWave decode compute kernels — the Metal port of the vendored Vulkan shaders
+// (crates/pyrowave-sys/vendor/pyrowave/shaders/wavelet_dequant.comp + idwt.comp, upstream pin
+// 509e4f88, MIT © 2025 Hans-Kristian Arntzen). Runtime-compiled Swift strings per client
+// convention (no metallib build step — see GamepadChrome.swift's rationale); these are the
+// client's first compute pipelines.
+//
+// Port notes (design/pyrowave-codec-plan.md §4.7):
+// • Only the STORAGE_MODE 0 path exists: MSL device pointers replace the 8/16-bit-storage SSBO
+//   aliases; the texel-buffer (mode 1) and linear-image (mode 2) fallbacks are non-Apple IHV
+//   workarounds and are dropped, as is the fragment-iDWT path (Mali/Adreno only).
+// • Subgroup ops map 1:1: subgroupInclusiveAdd → simd_prefix_inclusive_sum, and the fixed
+//   32-wide Apple simdgroups take the GLSL's `SubgroupSize <= 32` scan branch; the shuffle-up
+//   and LDS fallbacks for exotic wave sizes are dead code here. The dequant kernel needs the
+//   16 header lanes inside ONE simdgroup — MetalWaveletDecoder's probe enforces
+//   threadExecutionWidth >= 16.
+// • Precision matches upstream's desktop default (PYROWAVE_PRECISION=1): float arithmetic,
+//   half2 threadgroup storage; the coefficient textures are R16Float for DWT levels 0–1 and
+//   R32Float for levels 2–4 (the low-res levels feed long reconstruction chains — upstream
+//   keeps them fp32 for exactly that reason).
+// • The gather + mirrored-repeat addressing in idwt is the precision-sensitive spot (upstream
+//   fought a Mali compiler bug there); the golden-frame PSNR fixtures are the guard.
+
+import Foundation
+
+let waveletShaderSource = """
+#include <metal_stdlib>
+using namespace metal;
+
+// ---------------------------------------------------------------------------------------------
+// Shared helpers (dwt_swizzle.h / constants.h / dwt_quant_scale.h)
+// ---------------------------------------------------------------------------------------------
+
+static inline int2 unswizzle8x8(uint index)
+{
+    uint y = extract_bits(index, 0, 1);
+    uint x = extract_bits(index, 1, 2);
+    y |= extract_bits(index, 3, 2) << 1;
+    x |= extract_bits(index, 5, 1) << 2;
+    return int2(int(x), int(y));
+}
+
+// GLSL bitfieldExtract(x, 0, n) where n may be 0; MSL extract_bits(bits=0) is not guaranteed
+// to return 0, so mask explicitly.
+static inline uint mask_lo(uint x, int n)
+{
+    return (n <= 0) ? 0u : (x & (0xffffffffu >> (32 - n)));
+}
+
+// pyrowave_common.hpp decode_quant: custom FP formulation, MaxScaleExp = 4.
+static inline float decode_quant(uint quant_code)
+{
+    int e = 4 - int(quant_code >> 3);
+    int m = int(quant_code) & 0x7;
+    return (1.0f / (8.0f * 1024.0f * 1024.0f)) * float((8 + m) * (1 << (20 + e)));
+}
+
+// dwt_quant_scale.h: per-8x8 quant scale, min 0.25, max ~2.2.
+static inline float decode_quant_scale(uint code)
+{
+    return float(code) / 8.0f + 0.25f;
+}
+
+// constants.h
+constant int QUANT_SCALE_OFFSET = 20;
+constant int QUANT_SCALE_BITS = 4;
+
+// ---------------------------------------------------------------------------------------------
+// wavelet_dequant — one 128-thread threadgroup decodes one 32x32 coefficient block
+// ---------------------------------------------------------------------------------------------
+
+struct DequantRegisters {
+    int2 resolution;
+    int output_layer;
+    int block_offset_32x32;
+    int block_stride_32x32;
+};
+
+struct DecodedPair { float4 col0; float4 col1; }; // GLSL mat2x4: m[j][i] -> colJ[i]
+
+// Bit-plane magnitude decode for one thread's 4x2 coefficient group (decode_payload in the
+// GLSL). `code_word` is the 8x8 block's 16-bit control word (2 bits of extra planes per 4x2
+// group), `q_bits` the base plane count, `offset` the block's plane-payload start byte,
+// `block_index` this thread's group (0..7). Nonzero magnitudes get the +0.5 deadzone
+// reconstruction bias.
+static DecodedPair decode_payload(const device uchar *payload_u8,
+                                  uint code_word, uint q_bits, uint offset, uint block_index)
+{
+    DecodedPair m;
+    m.col0 = float4(0.0f);
+    m.col1 = float4(0.0f);
+    if (code_word == 0)
+        return m;
+
+    int bit_offset = 2 * int(block_index);
+
+    uint lsbs = code_word & 0x5555u;
+    uint msbs = code_word & 0xaaaau;
+    uint msbs_shift = msbs >> 1;
+    msbs |= msbs_shift;
+
+    uint byte_offset =
+        popcount(mask_lo(lsbs, bit_offset)) +
+        popcount(mask_lo(msbs, bit_offset)) +
+        q_bits * block_index + offset;
+
+    uint payload = uint(payload_u8[byte_offset]);
+
+    uint local_control_word = extract_bits(code_word, uint(bit_offset), 2);
+    int decoded_abs[8] = {0, 0, 0, 0, 0, 0, 0, 0};
+    int plane_iterations = int(q_bits + local_control_word);
+
+    for (int q = plane_iterations - 1; q >= 0; q--)
+    {
+        for (int b = 0; b < 8; b++)
+        {
+            int decoded = int(extract_bits(payload, uint(b), 1));
+            decoded_abs[b] = insert_bits(decoded_abs[b], decoded, uint(q), 1);
+        }
+        byte_offset++;
+        payload = uint(payload_u8[byte_offset]);
+    }
+
+    for (int i = 0; i < 4; i++)
+    {
+        for (int j = 0; j < 2; j++)
+        {
+            float v = float(decoded_abs[i * 2 + j]);
+            if (v != 0.0f)
+                v += 0.5f;
+            if (j == 0) m.col0[i] = v; else m.col1[i] = v;
+        }
+    }
+    return m;
+}
+
+kernel void wavelet_dequant(
+    texture2d_array<float, access::write> uDequantImg [[texture(0)]],
+    const device uint *payload_offsets [[buffer(0)]],
+    const device uint *payload_u32 [[buffer(1)]],
+    constant DequantRegisters &registers [[buffer(2)]],
+    uint3 wg_id [[threadgroup_position_in_grid]],
+    uint local_index [[thread_index_in_threadgroup]],
+    uint simd_lane [[thread_index_in_simdgroup]],
+    uint simd_group [[simdgroup_index_in_threadgroup]],
+    uint simd_size [[threads_per_simdgroup]])
+{
+    // STORAGE_MODE 0's three aliased SSBO views over one buffer, as typed pointers.
+    const device ushort *payload_u16 = reinterpret_cast<const device ushort *>(payload_u32);
+    const device uchar *payload_u8 = reinterpret_cast<const device uchar *>(payload_u32);
+
+    threadgroup uint shared_sign_offset;
+    threadgroup uint shared_plane_byte_offsets[16];
+    threadgroup uint shared_sign_scan[128 / 4];
+
+    int block_index_32x32 = int(uint(registers.block_offset_32x32) +
+        wg_id.y * uint(registers.block_stride_32x32) +
+        wg_id.x);
+
+    uint block_local_index = extract_bits(local_index, 0, 3);
+    uint block_x = extract_bits(local_index, 3, 2);
+    uint block_y = extract_bits(local_index, 5, 2);
+    uint linear_block = block_y * 4 + block_x;
+
+    // Each thread individually decodes 8 values (a 4x2 group of its 8x8 block).
+    int2 local_coord = unswizzle8x8(block_local_index << 3);
+
+    int2 coord = int2(wg_id.xy) * 32;
+    coord += 8 * int2(int(block_x), int(block_y));
+    coord += local_coord;
+
+    uint offset_u32 = payload_offsets[block_index_32x32];
+
+    // Missing / lost block: zero coefficients (this is how a partial frame's holes decode).
+    if (offset_u32 == ~0u)
+    {
+        for (int j = 0; j < 2; j++)
+            for (int i = 0; i < 4; i++)
+                uDequantImg.write(float4(0.0f), uint2(coord + int2(i, j)), uint(registers.output_layer));
+        return;
+    }
+
+    uint ballot = payload_u32[offset_u32] & 0xffffu;
+    uint q_code = payload_u32[offset_u32 + 1] & 0xffu;
+
+    // Threads 0..15 (one per 8x8 block, all inside simdgroup 0) prefix-scan the per-block
+    // plane-payload byte costs into shared_plane_byte_offsets, and lane 15 records where the
+    // sign bitstream starts.
+    if (local_index < 16)
+    {
+        uint control_word = 0;
+        uint q_bits = 0;
+
+        if (extract_bits(ballot, local_index, 1) != 0)
+        {
+            uint local_code_offset = popcount(mask_lo(ballot, int(local_index)));
+            control_word = uint(payload_u16[offset_u32 * 2 + 4 + local_code_offset]);
+            q_bits = uint(payload_u8[offset_u32 * 4 + 8 + popcount(ballot) * 2 + local_code_offset]) & 0xfu;
+        }
+
+        uint lsbs = control_word & 0x5555u;
+        uint msbs = control_word & 0xaaaau;
+        uint msbs_shift = msbs >> 1;
+        msbs |= msbs_shift;
+        uint byte_cost = popcount(lsbs) + popcount(msbs) + q_bits * 8;
+
+        uint byte_scan = offset_u32 * 4 + 8 + 3 * popcount(ballot) + simd_prefix_inclusive_sum(byte_cost);
+        if (local_index == 15)
+            shared_sign_offset = 8 * byte_scan;
+        shared_plane_byte_offsets[local_index] = byte_scan - byte_cost;
+    }
+
+    threadgroup_barrier(mem_flags::mem_threadgroup);
+
+    DecodedPair v;
+    int significant_count;
+
+    if (extract_bits(ballot, linear_block, 1) != 0)
+    {
+        uint local_code_offset = popcount(mask_lo(ballot, int(linear_block)));
+
+        uint control_word = uint(payload_u16[offset_u32 * 2 + 4 + local_code_offset]);
+        uint control_word2 = uint(payload_u8[offset_u32 * 4 + 8 + popcount(ballot) * 2 + local_code_offset]);
+
+        v = decode_payload(payload_u8, control_word, control_word2 & 0xfu,
+            shared_plane_byte_offsets[linear_block], block_local_index);
+
+        significant_count = 0;
+        for (int j = 0; j < 2; j++)
+            for (int i = 0; i < 4; i++)
+                significant_count += int(((j == 0) ? v.col0[i] : v.col1[i]) != 0.0f);
+
+        float q = decode_quant(q_code);
+        float inv_scale = q * decode_quant_scale(extract_bits(control_word2, uint(QUANT_SCALE_OFFSET - 16), uint(QUANT_SCALE_BITS)));
+
+        v.col0 *= inv_scale;
+        v.col1 *= inv_scale;
+    }
+    else
+    {
+        v.col0 = float4(0.0f);
+        v.col1 = float4(0.0f);
+        significant_count = 0;
+    }
+
+    // Cross-threadgroup scan of significant-coefficient counts → each thread's first sign-bit
+    // position. Apple simdgroups are >= 16 wide, so this is the GLSL's `SubgroupSize <= 32`
+    // branch; the shuffle/LDS fallbacks are unnecessary.
+    int significant_scan = int(simd_prefix_inclusive_sum(uint(significant_count)));
+    if (simd_lane == simd_size - 1)
+        shared_sign_scan[simd_group] = uint(significant_scan);
+
+    threadgroup_barrier(mem_flags::mem_threadgroup);
+    uint num_simdgroups = (128 + simd_size - 1) / simd_size;
+    if (local_index < num_simdgroups)
+        shared_sign_scan[local_index] = simd_prefix_inclusive_sum(shared_sign_scan[local_index]);
+    threadgroup_barrier(mem_flags::mem_threadgroup);
+
+    uint sign_offset = shared_sign_offset + uint(significant_scan - significant_count);
+    if (simd_group != 0)
+        sign_offset += shared_sign_scan[simd_group - 1];
+
+    // Load 64 bits of sign stream and bit-align (may read one word past the payload — the
+    // buffer carries a 16-byte zeroed guard tail for exactly this).
+    uint sign_word = payload_u32[sign_offset / 32 + 0];
+    uint sign_word_upper = payload_u32[sign_offset / 32 + 1];
+
+    uint masked_sign_offset = sign_offset & 31u;
+    if (masked_sign_offset != 0)
+    {
+        sign_word >>= masked_sign_offset;
+        sign_word |= sign_word_upper << (32 - masked_sign_offset);
+    }
+
+    int sign_counter = 0;
+
+    for (int i = 0; i < 4; i++)
+    {
+        for (int j = 0; j < 2; j++)
+        {
+            float val = (j == 0) ? v.col0[i] : v.col1[i];
+            if (val != 0.0f)
+            {
+                val *= 1.0f - 2.0f * float(extract_bits(sign_word, uint(sign_counter), 1));
+                sign_counter++;
+                if (j == 0) v.col0[i] = val; else v.col1[i] = val;
+            }
+        }
+    }
+
+    for (int j = 0; j < 2; j++)
+        for (int i = 0; i < 4; i++)
+            uDequantImg.write(float4((j == 0) ? v.col0[i] : v.col1[i]),
+                              uint2(coord + int2(i, j)), uint(registers.output_layer));
+}
+
+// ---------------------------------------------------------------------------------------------
+// idwt — inverse CDF 9/7; one 64-thread threadgroup reconstructs one 32x32 output tile from the
+// four half-res band layers (LL/HL/LH/HH), with a 4-sample mirror apron. The caller passes the
+// band-image resolution TRANSPOSED (the kernel transposes on load and store, so one kernel does
+// both the horizontal and vertical passes).
+// ---------------------------------------------------------------------------------------------
+
+constant bool DCShift [[function_constant(0)]];
+
+struct IdwtRegisters {
+    int2 resolution;
+    float2 inv_resolution;
+};
+
+constant int APRON = 4;
+constant int APRON_HALF = APRON / 2;
+constant int BLOCK_SIZE = 32;
+constant int BLOCK_SIZE_HALF = BLOCK_SIZE >> 1;
+
+// CDF 9/7 lifting constants (dwt_common.h).
+constant float ALPHA = -1.586134342059924f;
+constant float BETA = -0.052980118572961f;
+constant float GAMMA = 0.882911075530934f;
+constant float DELTA = 0.443506852043971f;
+constant float K = 1.230174104914001f;
+constant float inv_K = 1.0f / 1.230174104914001f;
+
+constant int SHARED_ROWS = (BLOCK_SIZE + 2 * APRON) / 2;      // 20
+constant int SHARED_COLS = (BLOCK_SIZE + 2 * APRON) + 1;      // 41 (+1 avoids bank conflicts)
+
+static inline float2 load_shared(threadgroup half2 (&blk)[SHARED_ROWS][SHARED_COLS], int y, int x)
+{
+    return float2(blk[y][x]);
+}
+
+static inline void store_shared(threadgroup half2 (&blk)[SHARED_ROWS][SHARED_COLS], int y, int x, float2 v)
+{
+    blk[y][x] = half2(v);
+}
+
+// Even/odd-phase coordinate nudge so mirrored-repeat gather reproduces JPEG2000 whole-sample
+// mirroring at the image borders, then transpose (uv.yx) on load.
+static inline float2 generate_mirror_uv(int2 coord, bool even_x, bool even_y,
+                                        int2 resolution, float2 inv_resolution)
+{
+    coord.x -= int(even_x && coord.x < 0);
+    coord.y -= int(even_y && coord.y < 0);
+    coord += 1;
+    coord.x += int(!even_x && coord.x >= resolution.x);
+    coord.y += int(!even_y && coord.y >= resolution.y);
+    float2 uv = float2(coord) * inv_resolution;
+    return uv.yx;
+}
+
+static inline void write_shared_4x4(threadgroup half2 (&blk)[SHARED_ROWS][SHARED_COLS],
+                                    int2 coord, float4 t0, float4 t1, float4 t2, float4 t3)
+{
+    store_shared(blk, coord.y + 0, 2 * coord.x + 0, float2(t0.x, t2.x));
+    store_shared(blk, coord.y + 0, 2 * coord.x + 1, float2(t1.x, t3.x));
+    store_shared(blk, coord.y + 0, 2 * coord.x + 2, float2(t0.y, t2.y));
+    store_shared(blk, coord.y + 0, 2 * coord.x + 3, float2(t1.y, t3.y));
+    store_shared(blk, coord.y + 1, 2 * coord.x + 0, float2(t0.z, t2.z));
+    store_shared(blk, coord.y + 1, 2 * coord.x + 1, float2(t1.z, t3.z));
+    store_shared(blk, coord.y + 1, 2 * coord.x + 2, float2(t0.w, t2.w));
+    store_shared(blk, coord.y + 1, 2 * coord.x + 3, float2(t1.w, t3.w));
+}
+
+// textureGather(...).wxzy — Metal's gather returns the same counter-clockwise-from-(i0,j1)
+// component order as Vulkan, so the reorder is identical.
+static inline float4 gather_layer(texture2d_array<float, access::sample> tex, sampler smp,
+                                  float2 uv, uint layer)
+{
+    float4 g = tex.gather(smp, uv, layer);
+    return float4(g.w, g.x, g.z, g.y);
+}
+
+static void load_image_with_apron(texture2d_array<float, access::sample> tex, sampler smp,
+                                  threadgroup half2 (&blk)[SHARED_ROWS][SHARED_COLS],
+                                  uint local_index, uint2 wg_id,
+                                  int2 resolution, float2 inv_resolution)
+{
+    int2 base_coord = int2(wg_id) * BLOCK_SIZE_HALF - APRON_HALF;
+    int2 local_coord0 = 2 * unswizzle8x8(local_index);
+    int2 coord0 = base_coord + local_coord0;
+
+    // Band layers gathered in 0/2/1/3 order (LL/LH/HL/HH interleave for the 2x2 scatter).
+    float4 texels0 = gather_layer(tex, smp, generate_mirror_uv(coord0, true, true, resolution, inv_resolution), 0);
+    float4 texels1 = gather_layer(tex, smp, generate_mirror_uv(coord0, false, true, resolution, inv_resolution), 2);
+    float4 texels2 = gather_layer(tex, smp, generate_mirror_uv(coord0, true, false, resolution, inv_resolution), 1);
+    float4 texels3 = gather_layer(tex, smp, generate_mirror_uv(coord0, false, false, resolution, inv_resolution), 3);
+    write_shared_4x4(blk, local_coord0, texels0, texels1, texels2, texels3);
+
+    int2 local_coord_horiz = int2(BLOCK_SIZE_HALF + 2 * int(local_index % 2u), 2 * int(local_index / 2u));
+    if (local_coord_horiz.y < BLOCK_SIZE_HALF + 2 * APRON_HALF)
+    {
+        int2 c = base_coord + local_coord_horiz;
+        texels0 = gather_layer(tex, smp, generate_mirror_uv(c, true, true, resolution, inv_resolution), 0);
+        texels1 = gather_layer(tex, smp, generate_mirror_uv(c, false, true, resolution, inv_resolution), 2);
+        texels2 = gather_layer(tex, smp, generate_mirror_uv(c, true, false, resolution, inv_resolution), 1);
+        texels3 = gather_layer(tex, smp, generate_mirror_uv(c, false, false, resolution, inv_resolution), 3);
+        write_shared_4x4(blk, local_coord_horiz, texels0, texels1, texels2, texels3);
+    }
+
+    int2 local_coord_vert = local_coord_horiz.yx;
+    if (local_coord_vert.x < BLOCK_SIZE_HALF)
+    {
+        int2 c = base_coord + local_coord_vert;
+        texels0 = gather_layer(tex, smp, generate_mirror_uv(c, true, true, resolution, inv_resolution), 0);
+        texels1 = gather_layer(tex, smp, generate_mirror_uv(c, false, true, resolution, inv_resolution), 2);
+        texels2 = gather_layer(tex, smp, generate_mirror_uv(c, true, false, resolution, inv_resolution), 1);
+        texels3 = gather_layer(tex, smp, generate_mirror_uv(c, false, false, resolution, inv_resolution), 3);
+        write_shared_4x4(blk, local_coord_vert, texels0, texels1, texels2, texels3);
+    }
+
+    threadgroup_barrier(mem_flags::mem_threadgroup);
+}
+
+static void inverse_transform8x2(threadgroup half2 (&blk)[SHARED_ROWS][SHARED_COLS], uint local_index)
+{
+    const int SIZE = 8;
+    const int PADDED_SIZE = SIZE + 2 * APRON;
+    const int PADDED_SIZE_HALF = PADDED_SIZE / 2;
+    float2 values[PADDED_SIZE];
+
+    int2 local_coord = int2(8 * int(local_index % 4u), int(local_index / 4u));
+
+    for (int i = 0; i < PADDED_SIZE; i += 2)
+    {
+        float2 v0 = load_shared(blk, local_coord.y, local_coord.x + i + 0);
+        float2 v1 = load_shared(blk, local_coord.y, local_coord.x + i + 1);
+        values[i + 0] = v0 * K;
+        values[i + 1] = v1 * inv_K;
+    }
+
+    // CDF 9/7 inverse lifting steps.
+    for (int i = 2; i < PADDED_SIZE - 1; i += 2)
+        values[i] -= DELTA * (values[i - 1] + values[i + 1]);
+    for (int i = 3; i < PADDED_SIZE - 2; i += 2)
+        values[i] -= GAMMA * (values[i - 1] + values[i + 1]);
+    for (int i = 4; i < PADDED_SIZE - 3; i += 2)
+        values[i] -= BETA * (values[i - 1] + values[i + 1]);
+    for (int i = 5; i < PADDED_SIZE - 4; i += 2)
+        values[i] -= ALPHA * (values[i - 1] + values[i + 1]);
+
+    // Avoid WAR hazard.
+    threadgroup_barrier(mem_flags::mem_threadgroup);
+
+    for (int i = APRON_HALF; i < PADDED_SIZE_HALF - APRON_HALF; i++)
+    {
+        float2 a = values[2 * i + 0];
+        float2 b = values[2 * i + 1];
+
+        // Transpose the 2x2 block, transpose write.
+        float2 t0 = float2(a.x, b.x);
+        float2 t1 = float2(a.y, b.y);
+
+        int y_coord = (local_coord.x >> 1) + (i - APRON_HALF);
+        store_shared(blk, y_coord, 2 * local_coord.y + 0, t0);
+        store_shared(blk, y_coord, 2 * local_coord.y + 1, t1);
+    }
+}
+
+static void inverse_transform4x2(threadgroup half2 (&blk)[SHARED_ROWS][SHARED_COLS],
+                                 uint local_index, bool active_lane, int y_offset)
+{
+    const int SIZE = 4;
+    const int PADDED_SIZE = SIZE + 2 * APRON;
+    const int PADDED_SIZE_HALF = PADDED_SIZE / 2;
+    float2 values[PADDED_SIZE];
+
+    int2 local_coord = int2(4 * int(local_index % 8u), int(local_index / 8u) + y_offset);
+
+    if (active_lane)
+    {
+        for (int i = 0; i < PADDED_SIZE; i += 2)
+        {
+            float2 v0 = load_shared(blk, local_coord.y, local_coord.x + i + 0);
+            float2 v1 = load_shared(blk, local_coord.y, local_coord.x + i + 1);
+            values[i + 0] = v0 * K;
+            values[i + 1] = v1 * inv_K;
+        }
+
+        for (int i = 2; i < PADDED_SIZE - 1; i += 2)
+            values[i] -= DELTA * (values[i - 1] + values[i + 1]);
+        for (int i = 3; i < PADDED_SIZE - 2; i += 2)
+            values[i] -= GAMMA * (values[i - 1] + values[i + 1]);
+        for (int i = 4; i < PADDED_SIZE - 3; i += 2)
+            values[i] -= BETA * (values[i - 1] + values[i + 1]);
+        for (int i = 5; i < PADDED_SIZE - 4; i += 2)
+            values[i] -= ALPHA * (values[i - 1] + values[i + 1]);
+    }
+
+    threadgroup_barrier(mem_flags::mem_threadgroup);
+
+    if (active_lane)
+    {
+        for (int i = APRON_HALF; i < PADDED_SIZE_HALF - APRON_HALF; i++)
+        {
+            float2 a = values[2 * i + 0];
+            float2 b = values[2 * i + 1];
+
+            float2 t0 = float2(a.x, b.x);
+            float2 t1 = float2(a.y, b.y);
+
+            int y_coord = (local_coord.x >> 1) + (i - APRON_HALF);
+            store_shared(blk, y_coord, 2 * local_coord.y + 0, t0);
+            store_shared(blk, y_coord, 2 * local_coord.y + 1, t1);
+        }
+    }
+}
+
+kernel void idwt(
+    texture2d_array<float, access::sample> uTexture [[texture(0)]],
+    texture2d<float, access::write> uOutput [[texture(1)]],
+    sampler uSampler [[sampler(0)]],
+    constant IdwtRegisters &registers [[buffer(0)]],
+    uint3 wg_id [[threadgroup_position_in_grid]],
+    uint local_index [[thread_index_in_threadgroup]])
+{
+    threadgroup half2 shared_block[SHARED_ROWS][SHARED_COLS];
+
+    load_image_with_apron(uTexture, uSampler, shared_block, local_index, wg_id.xy,
+                          registers.resolution, registers.inv_resolution);
+
+    // Horizontal transform.
+    inverse_transform8x2(shared_block, local_index);
+
+    // Also need to transform the apron.
+    inverse_transform4x2(shared_block, local_index, local_index < 32, BLOCK_SIZE_HALF);
+
+    threadgroup_barrier(mem_flags::mem_threadgroup);
+
+    // Vertical transform.
+    inverse_transform8x2(shared_block, local_index);
+
+    threadgroup_barrier(mem_flags::mem_threadgroup);
+
+    int2 local_coord = unswizzle8x8(local_index);
+
+    for (int y = local_coord.y; y < BLOCK_SIZE_HALF; y += 8)
+    {
+        for (int x = local_coord.x; x < BLOCK_SIZE; x += 8)
+        {
+            float2 v = load_shared(shared_block, y, x);
+            if (DCShift)
+                v += 0.5f;
+            // Transposed store (wg_id.yx) — undoes the transpose-on-load; out-of-range writes
+            // at the aligned-size overhang are dropped by Metal (matching the Vulkan behavior).
+            int2 out0 = int2(2 * y + 0, x) + BLOCK_SIZE * int2(int(wg_id.y), int(wg_id.x));
+            int2 out1 = int2(2 * y + 1, x) + BLOCK_SIZE * int2(int(wg_id.y), int(wg_id.x));
+            uOutput.write(float4(v.x), uint2(out0));
+            uOutput.write(float4(v.y), uint2(out1));
+        }
+    }
+}
+"""
@@ -9,6 +9,7 @@
 #if canImport(Metal) && canImport(QuartzCore)
 import AVFoundation
 import Foundation
+import PunktfunkShared
 import QuartzCore
 #if os(tvOS)
 import UIKit
@@ -37,6 +37,8 @@
 #if canImport(Metal) && canImport(QuartzCore)
 import AVFoundation
 import Foundation
+import Metal
+import PunktfunkShared
 import QuartzCore

 /// PUNKTFUNK_PRESENT_DEBUG=1: the render thread prints a once-per-second line with the decode
@@ -249,6 +251,28 @@ private final class PresentDebugStats: @unchecked Sendable {
    }
 }

+/// Bridges the VideoToolbox decode-completion callback to the core Automatic-bitrate controller's
+/// decode signal. Created as a pipeline property so the decoder's `onDecoded` callback (built in
+/// `init`, before the connection exists) can capture it, then `start` binds the live connection +
+/// the arming flag once known — the same "reference captured in init, configured in start" shape as
+/// `recovery`/`gate`. `record` runs on VideoToolbox's callback thread; `bind` runs once on the main
+/// thread before the pump feeds the first AU, so the plain fields are safe (set-once, then read).
+private final class DecodeReport: @unchecked Sendable {
+    private weak var connection: PunktfunkConnection?
+    private var enabled = false
+    func bind(_ connection: PunktfunkConnection) {
+        self.connection = connection
+        self.enabled = connection.wantsDecodeLatency()
+    }
+    /// Report received→decoded for one frame, in µs. Both stamps are client `CLOCK_REALTIME`
+    /// (no skew). Skips when the controller isn't armed, so it's free to call on every decode.
+    func record(receivedNs: Int64, decodedNs: Int64) {
+        guard enabled, let c = connection else { return }
+        let us = (decodedNs - receivedNs) / 1000
+        if us > 0 { c.reportDecodeUs(UInt32(min(us, Int64(UInt32.max)))) }
+    }
+}
+
 public final class Stage2Pipeline {
    private let ring = ReadyRing()
    private let presenter: MetalVideoPresenter
@@ -257,8 +281,12 @@ public final class Stage2Pipeline {
    /// the pipeline's lifetime; SessionPresenter resolves it per session (see PresentPacing).
    private let pacing: PresentPacing
    private let endToEndMeter: LatencyMeter?
+    private let decodeMeter: LatencyMeter?
    private let displayMeter: LatencyMeter?
    private let recovery = KeyframeRecovery()
+    /// Feeds the core Automatic-bitrate controller's decode signal from the decode callback; `start`
+    /// binds the live connection + arming flag (see DecodeReport).
+    private let decodeReport = DecodeReport()
    /// Post-loss freeze-until-reanchor gate (shared core policy via the C ABI). Created here seeded 0;
    /// `start` reseeds it to the live connection's drop count. Captured by the decoder callbacks
    /// (which withhold concealed frames) and driven by the pump (arm on a gap, poll per iteration).
@@ -306,11 +334,13 @@ public final class Stage2Pipeline {
        self.presenter = presenter
        self.pacing = pacing
        self.endToEndMeter = endToEndMeter
+        self.decodeMeter = decodeMeter
        self.displayMeter = displayMeter
        let ring = ring
        let recovery = recovery
        let renderSignal = renderSignal
        let gate = gate
+        let decodeReport = decodeReport
        self.decoder = VideoDecoder(
            onDecoded: { frame in
                // Decode stage = received→decoded, both client CLOCK_REALTIME (offset 0 — no
@@ -318,6 +348,10 @@ public final class Stage2Pipeline {
                // including ones the re-anchor gate withholds or the newest-wins ring drops.
                decodeMeter?.record(
                    ptsNs: UInt64(frame.receivedNs), atNs: frame.decodedNs, offsetNs: 0)
+                // Same interval, reported to the core bitrate controller so Automatic caps at this
+                // device's real decode limit instead of the network link ceiling. Every decoded
+                // frame (not just presented ones), so a newest-wins drop can't hide the backlog.
+                decodeReport.record(receivedNs: frame.receivedNs, decodedNs: frame.decodedNs)
                // Freeze-until-reanchor: WITHHOLD a decoder-concealed post-loss frame (the gray/
                // garbage VideoToolbox returns Ok for a reference-missing delta) — don't submit it,
                // so the CAMetalLayer keeps its last good drawable on glass. The gate lifts (returns
@@ -346,6 +380,7 @@ public final class Stage2Pipeline {
    ) {
        offsetNs = connection.clockOffsetNs
        recovery.bind(connection) // arm host-keyframe recovery for this session
+        decodeReport.bind(connection) // arm the Automatic-bitrate decode signal for this session
        gate.reseed(framesDropped: connection.framesDropped()) // baseline the freeze to this session
        token = StopFlag() // fresh token per start — a stop is permanent (like StreamPump)

@@ -362,7 +397,21 @@ public final class Stage2Pipeline {
        let presenter = presenter
        let pumpStopped = pumpStopped
        let reanchorGate = gate
-        let thread = Thread {
+        // PyroWave rides a different decode half: no CMFormatDescription/VideoToolbox machinery
+        // (a wavelet AU has no parameter sets), no keyframe recovery or re-anchor freeze (the
+        // stream is all-intra and Phase 4's partial delivery WANTS lossy frames on glass as
+        // localized blur, not a freeze). The ready ring, render thread, pacing and meters are
+        // shared unchanged.
+        let thread: Thread
+        if connection.videoCodec == .pyrowave {
+            thread = Self.makePyroWavePump(
+                connection: connection, token: token, pumpStopped: pumpStopped,
+                ring: ring, renderSignal: renderSignal,
+                device: presenter.metalDevice, queue: presenter.metalQueue,
+                decodeMeter: decodeMeter,
+                onFrame: onFrame, onSessionEnd: onSessionEnd, onDecodedSize: onDecodedSize)
+        } else {
+            thread = Thread {
            defer { pumpStopped.signal() } // let stop() join the pump (bounded) before decoder.reset()
            var format: CMVideoFormatDescription?
            // Report coded dims to the resize overlay only on a CHANGE (new-mode IDR), not per
@@ -383,6 +432,15 @@ public final class Stage2Pipeline {
            while alive, !token.isStopped {
                alive = autoreleasepool { () -> Bool in
                do {
+                    // Background keep-alive: drain one AU (flow control + host pacing) and discard it
+                    // BEFORE any VideoToolbox decode or Metal render — no GPU work off-screen. The
+                    // decoder session is left intact; exitBackground requests a fresh IDR and the
+                    // re-anchor gate arms on the resumed frame-index gap so concealed frames are
+                    // withheld until it lands.
+                    if connection.isVideoDropped {
+                        _ = try connection.nextAU(timeoutMs: 100)
+                        return true
+                    }
                    // Loss recovery (the primary path). The reassembler drops unrecoverable AUs and the
                    // decoder conceals the reference-missing deltas — often WITHOUT an error callback —
                    // so key off the drop count climbing, then keep asking (awaitingIDR) until a fresh
@@ -445,6 +503,7 @@ public final class Stage2Pipeline {
                }
                }
            }
+            }
        }
        thread.name = "punktfunk-stage2-pump"
        thread.qualityOfService = .userInteractive
@@ -504,9 +563,7 @@ public final class Stage2Pipeline {
                let presentAt = vsyncEnabled
                    ? vsyncClock.nextVsync(after: CACurrentMediaTime()) : nil
                let renderStarted = CACurrentMediaTime()
-                let rendered = presenter.render(
-                    frame.pixelBuffer, isHDR: frame.isHDR, presentAtMediaTime: presentAt
-                ) { presentedNs in
+                let onGlass: (Int64?) -> Void = { presentedNs in
                    // Stage-3: the flip reached glass (or was dropped) — free the present slot,
                    // then re-signal so the freshest waiting ring frame goes out immediately.
                    if let gate {
@@ -525,6 +582,18 @@ public final class Stage2Pipeline {
                    displayMeter?.record(ptsNs: UInt64(frame.decodedNs), atNs: atNs, offsetNs: 0)
                    debugStats?.presented(atNs: presentedNs)
                }
+                // One present tail, two decode sources: the VideoToolbox biplanar buffer or the
+                // PyroWave Metal planes — the ring, pacing and meters are agnostic to which.
+                let rendered: Bool
+                switch frame.image {
+                case .video(let pixelBuffer, let isHDR):
+                    rendered = presenter.render(
+                        pixelBuffer, isHDR: isHDR, presentAtMediaTime: presentAt,
+                        onPresented: onGlass)
+                case .planar(let planes):
+                    rendered = presenter.renderPlanar(
+                        planes, presentAtMediaTime: presentAt, onPresented: onGlass)
+                }
                debugStats?.renderReturned(
                    ok: rendered, tookMs: (CACurrentMediaTime() - renderStarted) * 1000)
                if !rendered {
@@ -592,6 +661,100 @@ public final class Stage2Pipeline {
        renderSignal.signal() // wake the render thread so it can observe the stop and exit
    }

+    /// The PyroWave pump: AUs go straight into the Metal wavelet decoder (no VideoToolbox, no
+    /// format descriptions), decoded planes ride the same ready ring / render thread. All-intra
+    /// stream, so none of the VT pump's recovery machinery applies: keyframe/RFI requests are
+    /// silenced host-side for this codec, and a lossy (partial-delivery) frame is MEANT to
+    /// present as localized blur — never a freeze. Static + capture-by-parameter for the same
+    /// reason the VT pump avoids capturing `self` (a missed stop must not leak a live pipeline).
+    private static func makePyroWavePump(
+        connection: PunktfunkConnection, token: StopFlag, pumpStopped: DispatchSemaphore,
+        ring: ReadyRing, renderSignal: DispatchSemaphore,
+        device: MTLDevice, queue: MTLCommandQueue,
+        decodeMeter: LatencyMeter?,
+        onFrame: (@Sendable (AccessUnit) -> Void)?,
+        onSessionEnd: (@Sendable () -> Void)?,
+        onDecodedSize: (@Sendable (Int, Int) -> Void)?
+    ) -> Thread {
+        // The chunk-aligned parse window = the session's negotiated shard payload (Welcome);
+        // the 64-byte floor mirrors the Rust client's guard against a nonsense value.
+        let windowSize = max(64, Int(connection.shardPayload))
+        return Thread {
+            defer { pumpStopped.signal() }
+            // Compiles the two compute kernels on the session's first frames' thread — ~tens of
+            // ms, once per session. Failure = this device can't run the negotiated codec (the
+            // advertisement probe should have prevented this); end the session cleanly.
+            guard let decoder = MetalWaveletDecoder(device: device, queue: queue) else {
+                if !token.isStopped { onSessionEnd?() }
+                return
+            }
+            // Newest decoded frame index — a late partial (the reassembler's 30 ms fuse can
+            // deliver one behind a newer complete frame) must not travel back in time.
+            var newestIndex: UInt32?
+            var lastDims: (w: Int, h: Int)?
+            var alive = true
+            while alive, !token.isStopped {
+                alive = autoreleasepool { () -> Bool in
+                    do {
+                        // Background keep-alive: drain + discard before the Metal wavelet decode
+                        // (PyroWave is all-intra, so the resumed frame heals on its own — no IDR
+                        // request needed, just no GPU work off-screen).
+                        if connection.isVideoDropped {
+                            _ = try connection.nextAU(timeoutMs: 100)
+                            return true
+                        }
+                        guard let au = try connection.nextAU(timeoutMs: 100) else { return true }
+                        onFrame?(au)
+                        if let newest = newestIndex,
+                           Int32(bitPattern: au.frameIndex &- newest) <= 0 {
+                            return true // stale (or duplicate) frame — skip
+                        }
+                        guard !token.isStopped else { return true }
+                        let chunkAligned =
+                            au.flags & PunktfunkConnection.userFlagChunkAligned != 0
+                        let ptsNs = au.ptsNs
+                        let receivedNs = au.receivedNs
+                        let flags = au.flags
+                        let submitted = decoder.decode(
+                            au: au.data, chunkAligned: chunkAligned, windowSize: windowSize
+                        ) { planes in
+                            // Metal completed-handler thread — stamp + enqueue, don't block
+                            // (the exact contract of the VT output callback).
+                            guard let planes else { return }
+                            var ts = timespec()
+                            clock_gettime(CLOCK_REALTIME, &ts)
+                            let decodedNs =
+                                Int64(ts.tv_sec) * 1_000_000_000 + Int64(ts.tv_nsec)
+                            decodeMeter?.record(
+                                ptsNs: UInt64(receivedNs), atNs: decodedNs, offsetNs: 0)
+                            ring.submit(
+                                ReadyFrame(
+                                    ptsNs: ptsNs, receivedNs: receivedNs, decodedNs: decodedNs,
+                                    image: .planar(planes), flags: flags))
+                            renderSignal.signal()
+                        }
+                        if submitted {
+                            newestIndex = au.frameIndex
+                            // Decoded-size changes come from the SOF dims (this is also how a
+                            // mid-stream Reconfigure lands here) — report like the VT pump.
+                            if let size = decoder.decodedSize,
+                               lastDims?.w != size.width || lastDims?.h != size.height {
+                                lastDims = (size.width, size.height)
+                                onDecodedSize?(size.width, size.height)
+                            }
+                        }
+                        // A dropped AU (malformed / SOF lost / too few blocks) is just skipped:
+                        // every PyroWave frame is independently decodable, the next one heals.
+                        return true
+                    } catch {
+                        if !token.isStopped { onSessionEnd?() }
+                        return false // session closed
+                    }
+                }
+            }
+        }
+    }
+
    /// Convert a `CADisplayLink.targetTimestamp` (CACurrentMediaTime basis) to a `CLOCK_REALTIME`
    /// nanosecond instant — the present clock the AU pts + skew offset live in. Projects to the target
    /// present time (when the frame is actually on glass), not the moment we drew.
@@ -63,6 +63,14 @@ final class StreamPump {
            while alive, !token.isStopped {
                alive = autoreleasepool { () -> Bool in
                do {
+                    // Background keep-alive: drain one AU to keep QUIC flow control + host pacing
+                    // healthy, then discard it BEFORE any decode/enqueue — no VideoToolbox/Metal work
+                    // off-screen. Skips all recovery/gate bookkeeping too; exitBackground requests a
+                    // fresh IDR and the re-anchor gate re-arms on the resumed frame-index gap.
+                    if connection.isVideoDropped {
+                        _ = try connection.nextAU(timeoutMs: 100)
+                        return true
+                    }
                    // Loss recovery (the primary path). Under the host's infinite GOP the only
                    // recovery keyframe is one we request. The reassembler drops unrecoverable AUs
                    // (framesDropped); the decoder then *conceals* the reference-missing deltas — a
@@ -12,7 +12,23 @@ import CoreVideo
 import Foundation
 import VideoToolbox

-/// One decoded frame waiting to be presented. Owns a retained `CVPixelBuffer` until shown.
+/// A decoded frame's pixels — which present path they take. VideoToolbox codecs deliver a
+/// biplanar `CVPixelBuffer` (NV12/P010/444v/x444); the PyroWave Metal decoder delivers three
+/// separate R8 plane textures straight off its compute pass (there is no CVPixelBuffer — the
+/// planes never leave the GPU).
+public enum ReadyImage: @unchecked Sendable {
+    /// 8-bit NV12 / 4:4:4 biplanar (SDR) or 10-bit P010 / x444 (HDR), Metal-compatible.
+    /// `isHDR` = the stream is BT.2020 PQ and the presenter must configure EDR output.
+    case video(CVPixelBuffer, isHDR: Bool)
+    #if canImport(Metal)
+    /// PyroWave planar output (Y full-res + Cb/Cr half-res, 8-bit SDR) with its precomputed
+    /// CSC rows — presented by `MetalVideoPresenter.renderPlanar`.
+    case planar(WaveletPlanes)
+    #endif
+}
+
+/// One decoded frame waiting to be presented. Owns its image (a retained `CVPixelBuffer`, or
+/// the PyroWave ring textures) until shown.
 public struct ReadyFrame: @unchecked Sendable {
    /// Host capture clock (the AU's pts), in nanoseconds.
    public let ptsNs: UInt64
@@ -22,15 +38,26 @@ public struct ReadyFrame: @unchecked Sendable {
    public let receivedNs: Int64
    /// Client `CLOCK_REALTIME` instant decode completed, in nanoseconds.
    public let decodedNs: Int64
-    /// The decoded image — 8-bit NV12 biplanar (SDR) or 10-bit P010 biplanar (HDR), Metal-compatible.
-    public let pixelBuffer: CVPixelBuffer
-    /// True when the stream is HDR (BT.2020 PQ): the buffer is 10-bit P010 and the presenter must
-    /// configure EDR + BT.2020 PQ output. Derived from the decoded buffer's pixel format.
-    public let isHDR: Bool
+    /// The decoded image and which present path it takes.
+    public let image: ReadyImage
    /// The AU's wire `user_flags` (`AccessUnit.flags`), threaded through the decode via the frame
    /// context so the re-anchor gate can classify this decoded frame (IDR / RFI anchor / recovery
    /// mark) at present time — the async decode callback has no other access to it. 0 when unknown.
    public let flags: UInt32
+
+    /// The VideoToolbox path's buffer; nil for a PyroWave planar frame. (Kept as the accessor
+    /// the decode round-trip tests assert against.)
+    public var pixelBuffer: CVPixelBuffer? {
+        if case .video(let buffer, _) = image { return buffer }
+        return nil
+    }
+
+    /// Whether this frame presents on the HDR path. PyroWave planar frames are 8-bit SDR by
+    /// contract.
+    public var isHDR: Bool {
+        if case .video(_, let hdr) = image { return hdr }
+        return false
+    }
 }

 /// Per-frame context threaded through the VideoToolbox frame refcon: the AU's receipt instant (for
@@ -286,6 +313,6 @@ public final class VideoDecoder: @unchecked Sendable {
        onDecoded(
            ReadyFrame(
                ptsNs: ptsNs, receivedNs: receivedNs, decodedNs: decodedNs,
-                pixelBuffer: imageBuffer, isHDR: isHDR, flags: flags))
+                image: .video(imageBuffer, isHDR: isHDR), flags: flags))
    }
 }
@@ -19,6 +19,7 @@
 #if os(macOS)
 import AppKit
 import AVFoundation
+import PunktfunkShared
 import SwiftUI
 import os

@@ -35,6 +35,7 @@
 import AVFoundation
 import GameController
 import PunktfunkCore
+import PunktfunkShared
 import SwiftUI
 import UIKit
 import os
@@ -698,6 +699,7 @@ final class StreamLayerUIView: UIView {
        let mouse = TouchMouse()
        mouse.send = { [weak self] event in self?.onTouchEvent?(event) }
        mouse.hostPoint = { [weak self] point in self?.hostPoint(from: point) }
+        mouse.onKeyboardGesture = { [weak self] show in self?.setSoftKeyboardVisible(show) }
        return mouse
    }()
    /// The finger route latched at gesture start — a Settings change mid-gesture applies to
@@ -708,6 +710,22 @@ final class StreamLayerUIView: UIView {
    func resetTouchInput() {
        touchMouse.reset()
        fingerRoute = nil
+        setSoftKeyboardVisible(false) // a stream that's gone takes its keyboard with it
+    }
+
+    /// The soft keyboard is keyed off first-responder status: the three-finger swipe
+    /// (TouchMouse) summons/dismisses it here, and the UIKeyInput conformance below turns
+    /// what it types into wire key events. Also the reason `canBecomeFirstResponder` is true
+    /// on iOS (tvOS anchors the responder chain on the CONTROLLER instead — see
+    /// StreamViewController.viewDidAppear).
+    override var canBecomeFirstResponder: Bool { true }
+
+    func setSoftKeyboardVisible(_ visible: Bool) {
+        if visible {
+            becomeFirstResponder()
+        } else if isFirstResponder {
+            resignFirstResponder()
+        }
    }
    #endif

@@ -879,4 +897,46 @@ final class StreamLayerUIView: UIView {
    }
    #endif
 }
+
+#if os(iOS)
+// The soft keyboard's output → wire key events. UIKeyInput is deliberately minimal (no
+// UITextInput): the stream needs keystrokes, not an editing buffer — insertions map through
+// `SoftKeyMap` to US-positional VKs (with a VK_LSHIFT wrap for shifted characters) and
+// characters outside the map (emoji, non-Latin scripts) are dropped, matching the wire's VK
+// contract. Events ride the same `onTouchEvent` path as the touch-driven mouse, so they're
+// gated on captureEnabled with everything else and can't leak past a trust prompt.
+extension StreamLayerUIView: UIKeyInput {
+    // Keep the IME literal — no autocorrect/smart substitutions; a remote desktop is not prose,
+    // and the host does its own text handling.
+    var autocorrectionType: UITextAutocorrectionType { get { .no } set {} }
+    var autocapitalizationType: UITextAutocapitalizationType { get { .none } set {} }
+    var spellCheckingType: UITextSpellCheckingType { get { .no } set {} }
+    var smartQuotesType: UITextSmartQuotesType { get { .no } set {} }
+    var smartDashesType: UITextSmartDashesType { get { .no } set {} }
+    var smartInsertDeleteType: UITextSmartInsertDeleteType { get { .no } set {} }
+    var keyboardType: UIKeyboardType { get { .asciiCapable } set {} }
+
+    var hasText: Bool { false }
+
+    func insertText(_ text: String) {
+        // A hardware keyboard's presses reach the host through GCKeyboard AND arrive here as
+        // UIKeyInput insertions while we're first responder — forwarding both would double
+        // every character, so the HID path owns keys whenever a hardware keyboard is attached.
+        guard GCKeyboard.coalesced == nil else { return }
+        for ch in text {
+            guard let key = SoftKeyMap.vk(for: ch) else { continue }
+            if key.shift { onTouchEvent?(.key(0xA0, down: true)) } // VK_LSHIFT
+            onTouchEvent?(.key(key.vk, down: true))
+            onTouchEvent?(.key(key.vk, down: false))
+            if key.shift { onTouchEvent?(.key(0xA0, down: false)) }
+        }
+    }
+
+    func deleteBackward() {
+        guard GCKeyboard.coalesced == nil else { return } // see insertText
+        onTouchEvent?(.key(0x08, down: true)) // VK_BACK
+        onTouchEvent?(.key(0x08, down: false))
+    }
+}
+#endif
 #endif
@@ -0,0 +1,23 @@
+// The App-Group foundation shared by the app and its extensions (Widgets / Live Activity).
+//
+// PunktfunkShared is deliberately dependency-free: it links NEITHER PunktfunkKit (which drags in
+// the Rust staticlib + presentation layer) NOR any Apple UI framework. A widget process gets ~30 MB,
+// so everything an extension needs — the stored-host model + its JSON codec, the settings-key names,
+// the deep-link grammar, and (later) the Live Activity attributes — lives here and here only.
+
+import Foundation
+
+/// The one App-Group identifier, matched by `Config/*.entitlements`
+/// (`com.apple.security.application-groups`). Registered on the developer portal for both the app
+/// id (`io.unom.punktfunk`) and the widget extension id (`io.unom.punktfunk.widgets`).
+public enum AppGroup {
+    public static let suiteName = "group.io.unom.punktfunk"
+
+    /// The shared defaults suite. Non-nil in a correctly-entitled process; falls back to
+    /// `.standard` if the group is somehow unavailable (unsigned `swift run`, a misprovisioned
+    /// build) so the app still functions single-process rather than crashing — the widget just
+    /// won't see the same store there.
+    public static var defaults: UserDefaults {
+        UserDefaults(suiteName: suiteName) ?? .standard
+    }
+}
@@ -0,0 +1,57 @@
+// The `punktfunk://` deep-link grammar — the single builder/parser shared by the widget (which
+// emits links via `widgetURL`/`Link`) and the app (`ContentView.onOpenURL`, which routes them into
+// the existing connect path). Keeping both sides on one type means the wire format can't drift.
+//
+// Grammar (v1):
+//   punktfunk://connect/<host-uuid>                       — connect to a stored host
+//   punktfunk://connect/<host-uuid>?launch=<GameEntry.id> — connect and ask the host to launch it
+//
+// `launch` carries a `GameEntry.id` (e.g. "steam:570"); it is percent-encoded on build and decoded
+// on parse, so ids with reserved characters survive the round trip.
+
+import Foundation
+
+public enum DeepLink: Equatable {
+    /// Connect to a saved host; `launchID` is a `GameEntry.id` to launch on arrival, if any.
+    case connect(host: UUID, launchID: String?)
+
+    public static let scheme = "punktfunk"
+
+    /// Build the canonical URL for a route. Non-optional: every route is representable.
+    public var url: URL {
+        switch self {
+        case let .connect(host, launchID):
+            var comps = URLComponents()
+            comps.scheme = Self.scheme
+            comps.host = "connect"
+            comps.path = "/\(host.uuidString)"
+            if let launchID, !launchID.isEmpty {
+                comps.queryItems = [URLQueryItem(name: "launch", value: launchID)]
+            }
+            // URLComponents percent-encodes the query value; force-unwrap is safe for a URL we
+            // fully control (scheme/host/path are all valid).
+            return comps.url!
+        }
+    }
+
+    /// Parse an incoming URL, or nil if it isn't a recognized `punktfunk://` route. Tolerant of
+    /// case in the scheme and of a trailing slash on the path.
+    public init?(_ url: URL) {
+        guard url.scheme?.lowercased() == Self.scheme else { return nil }
+        guard let comps = URLComponents(url: url, resolvingAgainstBaseURL: false) else { return nil }
+
+        switch comps.host?.lowercased() {
+        case "connect":
+            // Path is "/<uuid>"; strip the leading slash and any trailing one.
+            let raw = comps.path
+                .trimmingCharacters(in: CharacterSet(charactersIn: "/"))
+            guard let host = UUID(uuidString: raw) else { return nil }
+            let launch = comps.queryItems?
+                .first(where: { $0.name == "launch" })?.value
+                .flatMap { $0.isEmpty ? nil : $0 }
+            self = .connect(host: host, launchID: launch)
+        default:
+            return nil
+        }
+    }
+}
@@ -1,7 +1,8 @@
 // One source of truth for the client's UserDefaults / @AppStorage keys. A magic-string key
 // duplicated across a setting's writer (a Settings @AppStorage) and reader (e.g. a stream view
 // reading UserDefaults) splits silently on a typo — the setting just stops taking effect. These
-// live in PunktfunkKit because both the app and the kit's views read them.
+// live in the dependency-free PunktfunkShared module (re-exported by PunktfunkKit) because the app,
+// the kit's views, AND the widget extension all read them — the widget needs `DefaultsKey.hosts`.

 import Foundation

@@ -27,8 +28,10 @@ public enum DefaultsKey {
    /// Requested audio channel count: 2 (stereo), 6 (5.1) or 8 (7.1). The host clamps to what it
    /// can capture; the resolved count drives the in-core decode + AVAudioEngine layout.
    public static let audioChannels = "punktfunk.audioChannels"
-    /// Preferred video codec: `"auto"` (host decides), `"hevc"`, or `"h264"`. A soft preference —
-    /// the host emits it when it can, else falls back. Drives the decoder via `Welcome.codec`.
+    /// Preferred video codec: `"auto"` (host decides), `"hevc"`, `"h264"`, `"av1"`, or
+    /// `"pyrowave"` (the opt-in wired-LAN wavelet codec — picking it advertises AND prefers it,
+    /// and forces the session SDR). A soft preference — the host emits it when it can, else
+    /// falls back. Drives the decoder via `Welcome.codec`.
    public static let codec = "punktfunk.codec"
    public static let micEnabled = "punktfunk.micEnabled"
    public static let speakerUID = "punktfunk.speakerUID"
@@ -97,12 +100,28 @@ public enum DefaultsKey {
    /// layout (the console launcher, gamepad-navigable settings, a coverflow-style library)
    /// whenever a gamepad is connected. On by default; see `GamepadUIEnvironment.isActive`.
    public static let gamepadUIEnabled = "punktfunk.gamepadUIEnabled"
+    /// iPhone: ALSO play the rumble the host addresses to controller 1 (wire pad 0) on this
+    /// device's own Taptic Engine — for phone-clip pads that ship without rumble motors, where
+    /// the phone body is the only actuator in the player's hands. Off by default (opt-in); read
+    /// once per session by `GamepadFeedback`. The toggle is shown only where the device actually
+    /// has a haptic actuator (no iPad/Mac/TV).
+    public static let rumbleOnDevice = "punktfunk.rumbleOnDevice"
    /// Auto-wake on connect: when connecting to a saved host that isn't advertising on mDNS, fire
    /// Wake-on-LAN and, if the dial fails, wait for it to come back before retrying (the "Waking…"
    /// overlay). On by default. Turn off if a host that's already on just isn't seen on mDNS (a
    /// routed/VPN host), so connects go straight through instead of waiting out the wake timeout.
    /// The explicit "Wake Host" action stays available regardless. Read by ContentView.startSession.
    public static let autoWake = "punktfunk.autoWake"
+    /// iOS/iPadOS: keep a streaming session ALIVE when the app is backgrounded (audio background
+    /// mode). Off by default (today's freeze-on-background is the default). When on, backgrounding a
+    /// live session keeps audio playing and the QUIC/pump live while DROPPING video decode, and a
+    /// bounded timer (`backgroundTimeoutMinutes`) auto-disconnects if the user doesn't return. Read
+    /// by ContentView's scenePhase driver. Hidden on tvOS/macOS.
+    public static let backgroundKeepAlive = "punktfunk.backgroundKeepAlive"
+    /// iOS/iPadOS: minutes a backgrounded keep-alive session runs before auto-disconnecting (a
+    /// battery/thermal/bandwidth backstop). Default 10; the UI offers 1/5/10/30. The auto-disconnect
+    /// is non-deliberate (host linger kept), so a late return reconnects fast. Read on enterBackground.
+    public static let backgroundTimeoutMinutes = "punktfunk.backgroundTimeoutMinutes"
 }

 extension Notification.Name {
@@ -112,4 +131,15 @@ extension Notification.Name {
    /// menus) — it exists so the menu item is honest whenever it CAN fire, and as the shortcut's
    /// discoverable menu-bar surface.
    public static let punktfunkReleaseCapture = Notification.Name("io.unom.punktfunk.release-capture")
+
+    /// Posted by the Live Activity's / Shortcuts' End-stream intent (`EndStreamIntent.perform`,
+    /// which runs in the app's process): the app tears the active session down deliberately
+    /// (quit-close the host). Same cross-process-signal pattern as `punktfunkReleaseCapture` —
+    /// the intent lives in PunktfunkShared and can't reach the app's `SessionModel` directly.
+    public static let punktfunkEndActiveSession = Notification.Name("io.unom.punktfunk.end-active-session")
+
+    /// Posted by the Connect App Intent (Siri/Shortcuts) with a `punktfunk://` URL as `object`:
+    /// the app routes it through the SAME `.onOpenURL` handler a widget tap uses (one router, one
+    /// set of guards). The intent uses `openAppWhenRun`, so the app is foregrounded to receive it.
+    public static let punktfunkOpenDeepLink = Notification.Name("io.unom.punktfunk.open-deep-link")
 }
@@ -0,0 +1,56 @@
+// The saved-host as an App Intents entity — the parameter type for the Connect/Wake intents and
+// the configurable single-host widget. Lives in the shared module (not the app) because widget
+// *configuration* intents execute in the EXTENSION process, so the entity can't be app-only.
+//
+// AppIntents is genuinely available on macOS (13+), so this is gated on `canImport(AppIntents)`
+// (unlike ActivityKit, whose macOS types are unavailable) — it compiles on every platform and the
+// entity query reads the same shared App-Group store the widget does.
+
+#if canImport(AppIntents)
+import AppIntents
+import Foundation
+
+public struct HostEntity: AppEntity, Identifiable {
+    public static let typeDisplayRepresentation = TypeDisplayRepresentation(name: "Host")
+    public static let defaultQuery = HostEntityQuery()
+
+    public let id: UUID
+    public let name: String
+
+    public init(id: UUID, name: String) {
+        self.id = id
+        self.name = name
+    }
+
+    public init(_ host: StoredHost) {
+        self.id = host.id
+        self.name = host.displayName
+    }
+
+    public var displayRepresentation: DisplayRepresentation {
+        DisplayRepresentation(title: "\(name)")
+    }
+}
+
+public struct HostEntityQuery: EntityQuery {
+    public init() {}
+
+    public func entities(for identifiers: [UUID]) async throws -> [HostEntity] {
+        Self.loadHosts().filter { identifiers.contains($0.id) }.map(HostEntity.init)
+    }
+
+    /// Sorted most-recent first — Siri/Shortcuts and the widget config picker suggest recent hosts.
+    public func suggestedEntities() async throws -> [HostEntity] {
+        Self.loadHosts().map(HostEntity.init)
+    }
+
+    static func loadHosts() -> [StoredHost] {
+        guard let data = AppGroup.defaults.data(forKey: DefaultsKey.hosts),
+              let hosts = try? JSONDecoder().decode([StoredHost].self, from: data)
+        else { return [] }
+        return hosts.sorted {
+            ($0.lastConnected ?? .distantPast) > ($1.lastConnected ?? .distantPast)
+        }
+    }
+}
+#endif
@@ -0,0 +1,68 @@
+// The Live Activity's attributes — the ONE type that must be identical in the app (which starts
+// and updates the Activity) and the widget extension (which renders it). Hence it lives in the
+// dependency-free shared module.
+//
+// Gated on `os(iOS)`, NOT `canImport(ActivityKit)`: ActivityKit *imports* on macOS but its types
+// are `@available(macOS, unavailable)`, so canImport would wrongly admit this on the macOS build.
+// Live Activities are iPhone/iPad only (iPadOS reports os(iOS)).
+//
+// Naming/shape is a runtime contract: an Activity started by one build is decoded by the extension
+// of the same build, so keep `ContentState` Codable-stable across releases the way `StoredHost` is.
+
+#if os(iOS)
+import ActivityKit
+import Foundation
+
+public struct PunktfunkSessionAttributes: ActivityAttributes {
+    // Static for the Activity's whole life (set at request time).
+    public let hostID: UUID
+    public let hostName: String
+    /// The title of the launched game, if the session started from the library; nil for a plain
+    /// host connect (nothing tracks the live foreground app mid-session).
+    public let launchTitle: String?
+
+    public init(hostID: UUID, hostName: String, launchTitle: String?) {
+        self.hostID = hostID
+        self.hostName = hostName
+        self.launchTitle = launchTitle
+    }
+
+    public struct ContentState: Codable, Hashable {
+        public enum Stage: String, Codable, Hashable {
+            case streaming     // foreground, live
+            case background    // backgrounded keep-alive (countdown running)
+            case reconnecting  // post-loss re-anchor hold
+            case ending        // torn down — final state before dismissal
+        }
+
+        public var stage: Stage
+        /// Session start — drives `Text(timerInterval:)` for a free client-side ticking clock (no
+        /// per-second push needed).
+        public var startedAt: Date
+        /// e.g. "2560×1440 @120 · HEVC · HDR". Updated only when it actually changes.
+        public var modeLine: String
+        /// Coarse, updated sparsely (every ~30 s) — never the 1 Hz stats firehose.
+        public var latencyMs: Int?
+        public var mbps: Double?
+        /// While backgrounded: when the keep-alive auto-disconnect fires — drives the countdown.
+        public var backgroundDeadline: Date?
+
+        public init(
+            stage: Stage, startedAt: Date, modeLine: String,
+            latencyMs: Int? = nil, mbps: Double? = nil, backgroundDeadline: Date? = nil
+        ) {
+            self.stage = stage
+            self.startedAt = startedAt
+            self.modeLine = modeLine
+            self.latencyMs = latencyMs
+            self.mbps = mbps
+            self.backgroundDeadline = backgroundDeadline
+        }
+    }
+}
+
+/// Kind string for the Live Activity — kept next to the attributes so app + extension agree.
+public enum PunktfunkActivity {
+    public static let kind = "PunktfunkSession"
+}
+#endif
@@ -0,0 +1,30 @@
+// App Intents that must compile into BOTH the app and the widget extension live here in the shared
+// module. Today that's `EndStreamIntent` — the Live Activity's "End stream" button (a
+// LiveActivityIntent runs in the APP's process) which M4 also surfaces to Siri/Shortcuts.
+//
+// Gated on os(iOS): LiveActivityIntent is part of ActivityKit's world (iPhone/iPad only). The M4
+// Connect/Wake intents that need the app's router live in the app target, not here.
+
+#if os(iOS)
+import AppIntents
+import Foundation
+
+/// Ends the active streaming session. Backs the Live Activity's End button and the Shortcuts /
+/// Siri "End the Punktfunk stream" phrase. `perform()` runs in the app's process (LiveActivityIntent)
+/// — it posts `.punktfunkEndActiveSession`, which the app's SessionModel owner observes and turns
+/// into `disconnect(deliberate: true)` (the user explicitly ended it → quit-close the host).
+@available(iOS 17.0, *)
+public struct EndStreamIntent: LiveActivityIntent {
+    public static let title: LocalizedStringResource = "End Punktfunk Stream"
+    public static let description = IntentDescription("Ends the active Punktfunk streaming session.")
+
+    public init() {}
+
+    public func perform() async throws -> some IntentResult {
+        await MainActor.run {
+            NotificationCenter.default.post(name: .punktfunkEndActiveSession, object: nil)
+        }
+        return .result()
+    }
+}
+#endif
@@ -0,0 +1,57 @@
+// The saved-host model + its on-disk JSON wire format — the widget/extension depends on BOTH, so
+// they live in the dependency-free shared module. The `ObservableObject` store that wraps them
+// (`HostStore`, with add/remove/pin/reachability) stays in the app target; discovery-join helpers
+// (`matches`, `advertises`) stay there too because they reference PunktfunkKit's `DiscoveredHost`.
+//
+// Wire-format stability: the JSON encoding of `StoredHost` is now a shared contract between the app
+// (writer) and the widget (reader). The `PunktfunkSharedTests` codec round-trip pins it — do not
+// rename the coding keys or make a stored `Optional` non-optional (older saved JSON must still
+// decode; synthesized Decodable treats a missing Optional as nil).
+
+import Foundation
+
+/// The management-API port default (distinct from the data-plane `port`). Lives here (not in
+/// PunktfunkKit's LibraryClient, which re-exports it) so `StoredHost.effectiveMgmtPort` can resolve
+/// it without the shared module taking a dependency on the kit.
+public let punktfunkDefaultMgmtPort: UInt16 = 47990
+
+public struct StoredHost: Identifiable, Codable, Hashable {
+    public var id = UUID()
+    public var name: String
+    public var address: String
+    public var port: UInt16 = 9777
+    /// SHA-256 of the host's certificate, set after the user explicitly trusted it.
+    public var pinnedSHA256: Data?
+    /// Last time a streaming session actually started (nil until the first one).
+    public var lastConnected: Date?
+    /// Management-API port for the library browser (distinct from the data-plane `port`). Optional
+    /// (NOT a defaulted non-optional) so older saved hosts — whose JSON lacks this key — still
+    /// decode: synthesized Decodable ignores property defaults but treats a missing Optional as
+    /// nil. Resolve via `effectiveMgmtPort`. (Auth is mTLS by the pinned identity — no token.)
+    public var mgmtPort: UInt16?
+    /// Wake-on-LAN MAC address(es) of the host's wake-capable NIC(s), each `aa:bb:cc:dd:ee:ff`.
+    /// Learned from the host's mDNS `mac` TXT record while it's awake and persisted here, so the
+    /// client can send a magic packet to wake the host later (when it's asleep and no longer
+    /// advertising). Optional (same forward-compat reason as `mgmtPort`); nil until first learned.
+    public var macAddresses: [String]?
+
+    public init(
+        id: UUID = UUID(), name: String, address: String, port: UInt16 = 9777,
+        pinnedSHA256: Data? = nil, lastConnected: Date? = nil, mgmtPort: UInt16? = nil,
+        macAddresses: [String]? = nil
+    ) {
+        self.id = id
+        self.name = name
+        self.address = address
+        self.port = port
+        self.pinnedSHA256 = pinnedSHA256
+        self.lastConnected = lastConnected
+        self.mgmtPort = mgmtPort
+        self.macAddresses = macAddresses
+    }
+
+    public var displayName: String { name.isEmpty ? address : name }
+    public var effectiveMgmtPort: UInt16 { mgmtPort ?? punktfunkDefaultMgmtPort }
+    /// Wake-capable, in a form the wake helper accepts (empty when none learned yet).
+    public var wakeMacs: [String] { macAddresses ?? [] }
+}
@@ -237,10 +237,11 @@ final class AV1Tests: XCTestCase {
        let ready = try XCTUnwrap(frame)
        XCTAssertEqual(ready.ptsNs, 42_000_000)
        XCTAssertFalse(ready.isHDR)
-        XCTAssertEqual(CVPixelBufferGetWidth(ready.pixelBuffer), 320)
-        XCTAssertEqual(CVPixelBufferGetHeight(ready.pixelBuffer), 180)
+        let buffer = try XCTUnwrap(ready.pixelBuffer, "a VT decode delivers a .video frame")
+        XCTAssertEqual(CVPixelBufferGetWidth(buffer), 320)
+        XCTAssertEqual(CVPixelBufferGetHeight(buffer), 180)
        XCTAssertEqual(
-            CVPixelBufferGetPixelFormatType(ready.pixelBuffer),
+            CVPixelBufferGetPixelFormatType(buffer),
            kCVPixelFormatType_420YpCbCr8BiPlanarVideoRange, "SDR AV1 must decode to NV12")
        decoder.reset()
    }
@@ -0,0 +1,292 @@
+// PyroWave Metal decoder tests — two layers:
+//
+// 1. Bitstream/window-walk parser tests (pure CPU): hand-crafted packet streams assert the
+//    exact wire semantics of pyrowave_decoder.cpp's push_packet walk + the Phase-4
+//    chunk-aligned framing (4-byte window prefix, FRAG chains, zeroed missing shards).
+//
+// 2. Golden-frame PSNR tests (Metal GPU): host-encoded fixtures (crates/punktfunk-host
+//    encode/linux/pyrowave.rs `pyrowave_dump_golden`, run on a Vulkan box) decoded by the
+//    Metal port and PSNR-matched against upstream's own decoder output. Float wavelet math is
+//    not bit-exact across implementations (upstream ships precision variants), so the gate is
+//    PSNR, not equality. This is the §4.7 validation oracle for the hand-ported kernels —
+//    the gather/mirror addressing in idwt is the spot most likely to drift.
+
+#if canImport(Metal)
+import Metal
+import XCTest
+
+@testable import PunktfunkKit
+
+final class PyroWaveParserTests: XCTestCase {
+    // 256x144 → aligned 256x160; block space identical to the committed fixtures.
+    private let width = 256
+    private let height = 144
+
+    /// A BitstreamSequenceHeader (START_OF_FRAME) for `width`x`height`, 4:2:0 BT.709 limited.
+    private func sof(totalBlocks: Int, sequence: UInt32 = 1) -> [UInt8] {
+        let word0 =
+            UInt32(width - 1) | (UInt32(height - 1) << 14) | (sequence << 28) | (1 << 31)
+        // code=0 (SOF), chroma=0 (420), primaries/trc/matrix=0 (BT.709), range=1 (LIMITED),
+        // siting=0.
+        let word1 = UInt32(totalBlocks) | (1 << 30)
+        return le32(word0) + le32(word1)
+    }
+
+    /// A minimal coefficient packet: ballot=0 (all 8x8 blocks empty — legal and decodable),
+    /// payload_words=2 (header only).
+    private func packet(blockIndex: Int, sequence: UInt32 = 1) -> [UInt8] {
+        let word0 = UInt32(0) | (2 << 16) | (sequence << 28)
+        let word1 = UInt32(0) | (UInt32(blockIndex) << 8)
+        return le32(word0) + le32(word1)
+    }
+
+    private func le32(_ v: UInt32) -> [UInt8] {
+        [UInt8(v & 0xff), UInt8((v >> 8) & 0xff), UInt8((v >> 16) & 0xff), UInt8(v >> 24)]
+    }
+
+    /// Wrap bodies into `windowSize`-sized windows with the 4-byte used/kind prefix.
+    private func window(_ body: [UInt8], kind: UInt16, size: Int) -> [UInt8] {
+        precondition(body.count + 4 <= size)
+        var out = [UInt8(body.count & 0xff), UInt8(body.count >> 8)]
+        out += [UInt8(kind & 0xff), UInt8(kind >> 8)]
+        out += body
+        out += [UInt8](repeating: 0, count: size - out.count)
+        return out
+    }
+
+    func testLayoutMatchesUpstreamBlockSpace() {
+        // init_block_meta's walk for 256x144 (aligned 256x160): level extents halve from
+        // 128x80; per (comp,level,band) count32 = ceil(ceil(w/8)/4) * ceil(ceil(h/8)/4).
+        let layout = WaveletLayout(width: width, height: height)
+        XCTAssertEqual(layout.alignedWidth, 256)
+        XCTAssertEqual(layout.alignedHeight, 160)
+        XCTAssertEqual(layout.levelWidth(0), 128)
+        XCTAssertEqual(layout.levelHeight(0), 80)
+        XCTAssertEqual(layout.levelWidth(4), 8)
+        XCTAssertEqual(layout.levelHeight(4), 5)
+        // Hand-summed: L4 (8x5 → 1 block) × 3 comps × 4 bands = 12; L3 (16x10 → 1) × 9 = 9;
+        // L2 (32x20 → 1) × 9 = 9; L1 (64x40 → 2x2=4... ) — trust the invariant instead:
+        // every band's count is ceil(w8/4)*ceil(h8/4) and the total is their sum.
+        var expected = 0
+        for level in stride(from: 4, through: 0, by: -1) {
+            let w8 = (layout.levelWidth(level) + 7) / 8
+            let h8 = (layout.levelHeight(level) + 7) / 8
+            let per = ((w8 + 3) / 4) * ((h8 + 3) / 4)
+            for component in 0..<3 {
+                if level == 0 && component != 0 { continue }
+                expected += per * (level == 4 ? 4 : 3)
+            }
+        }
+        XCTAssertEqual(layout.blockCount32, expected)
+        // The finest luma level's stride is its 32-block row width.
+        XCTAssertEqual(layout.blockMeta[0][0][1].stride, (128 + 31) / 32)
+        // Level-0 chroma is not coded in 4:2:0.
+        XCTAssertEqual(layout.blockMeta[1][0][1].offset, -1)
+    }
+
+    func testDenseParseFillsOffsetsAndCountsBlocks() throws {
+        let layout = WaveletLayout(width: width, height: height)
+        var au = sof(totalBlocks: 4)
+        au += packet(blockIndex: 0)
+        au += packet(blockIndex: 3)
+        au += packet(blockIndex: 3) // duplicate — first wins, not double-counted
+        au += packet(blockIndex: layout.blockCount32 - 1)
+        let frame = try XCTUnwrap(
+            WaveletBitstream.parse(au: Data(au), chunkAligned: false, windowSize: 0))
+        XCTAssertEqual(frame.layout.width, width)
+        XCTAssertEqual(frame.totalBlocks, 4)
+        XCTAssertEqual(frame.decodedBlocks, 3)
+        XCTAssertEqual(frame.offsets[0], 0)
+        XCTAssertEqual(frame.offsets[3], 2) // u32 words: each header-only packet is 2 words
+        XCTAssertEqual(frame.offsets[1], UInt32.max)
+        XCTAssertEqual(frame.payload.count, 6)
+        XCTAssertFalse(frame.bt2020)
+        XCTAssertFalse(frame.fullRange) // range bit 1 = LIMITED
+    }
+
+    func testHalfOrFewerBlocksIsDropped() {
+        var au = sof(totalBlocks: 4)
+        au += packet(blockIndex: 0)
+        au += packet(blockIndex: 1)
+        // 2 of 4 decoded = exactly half — upstream requires MORE than half.
+        XCTAssertNil(WaveletBitstream.parse(au: Data(au), chunkAligned: false, windowSize: 0))
+    }
+
+    func testMissingSOFIsDropped() {
+        let au = packet(blockIndex: 0) + packet(blockIndex: 1)
+        XCTAssertNil(WaveletBitstream.parse(au: Data(au), chunkAligned: false, windowSize: 0))
+    }
+
+    func testTruncatedPacketIsRejected() {
+        var au = sof(totalBlocks: 1)
+        // Claims 4 payload words but only the 8-byte header follows.
+        let word0 = UInt32(0) | (4 << 16) | (1 << 28)
+        au += le32(word0) + le32(0)
+        XCTAssertNil(WaveletBitstream.parse(au: Data(au), chunkAligned: false, windowSize: 0))
+    }
+
+    func testWindowWalkPackedFragAndMissingShard() throws {
+        let size = 64
+        // Window 1: SOF + one packet, PACKED. Window 2: a FRAG chain carrying one packet split
+        // across two windows. Window 3: all zeros (a lost shard of a partial frame). Window 4:
+        // a PACKED packet — the chain break must not eat it.
+        let fragPacket = packet(blockIndex: 2)
+        var au = window(sof(totalBlocks: 3) + packet(blockIndex: 0), kind: 0, size: size)
+        au += window(Array(fragPacket[0..<5]), kind: 1, size: size)
+        au += window(Array(fragPacket[5...]), kind: 3, size: size)
+        au += [UInt8](repeating: 0, count: size) // missing shard
+        au += window(packet(blockIndex: 1), kind: 0, size: size)
+        let frame = try XCTUnwrap(
+            WaveletBitstream.parse(au: Data(au), chunkAligned: true, windowSize: size))
+        XCTAssertEqual(frame.decodedBlocks, 3)
+        XCTAssertEqual(frame.offsets[0], 0)
+        XCTAssertEqual(frame.offsets[2], 2)
+        XCTAssertEqual(frame.offsets[1], 4)
+    }
+
+    func testBrokenFragChainIsDiscarded() throws {
+        let size = 64
+        let fragPacket = packet(blockIndex: 2)
+        var au = window(sof(totalBlocks: 1) + packet(blockIndex: 0), kind: 0, size: size)
+        au += window(Array(fragPacket[0..<5]), kind: 1, size: size)
+        au += [UInt8](repeating: 0, count: size) // the chain's middle shard was lost
+        au += window(Array(fragPacket[5...]), kind: 3, size: size) // dangling LAST — dropped
+        let frame = try XCTUnwrap(
+            WaveletBitstream.parse(au: Data(au), chunkAligned: true, windowSize: size))
+        XCTAssertEqual(frame.decodedBlocks, 1)
+        XCTAssertEqual(frame.offsets[2], UInt32.max)
+    }
+}
+
+/// Golden-frame decode against the committed host-encoder fixtures. Skipped when the machine
+/// has no Metal device (headless CI) — everywhere else this is the hand-ported kernels' guard.
+final class PyroWaveGoldenTests: XCTestCase {
+    private static let fixtureDir = "PyroWaveFixtures"
+
+    private func fixture(_ name: String) throws -> Data {
+        let url = try XCTUnwrap(
+            Bundle.module.url(
+                forResource: name, withExtension: "bin", subdirectory: Self.fixtureDir),
+            "missing fixture \(name).bin — regenerate with pyrowave_dump_golden")
+        return try Data(contentsOf: url)
+    }
+
+    /// Completion box — the decode callback lands on a Metal thread.
+    private final class ResultBox: @unchecked Sendable {
+        let lock = NSLock()
+        var planes: WaveletPlanes?
+    }
+
+    /// Decode `au` synchronously and read all three planes back to CPU bytes.
+    private func decode(
+        au: Data, chunkAligned: Bool, windowSize: Int
+    ) throws -> (y: [UInt8], cb: [UInt8], cr: [UInt8]) {
+        let device = try XCTUnwrap(MTLCreateSystemDefaultDevice())
+        let queue = try XCTUnwrap(device.makeCommandQueue())
+        let decoder = try XCTUnwrap(MetalWaveletDecoder(device: device, queue: queue))
+        let done = expectation(description: "decode completes")
+        let box = ResultBox()
+        let submitted = decoder.decode(
+            au: au, chunkAligned: chunkAligned, windowSize: windowSize
+        ) { planes in
+            box.lock.lock()
+            box.planes = planes
+            box.lock.unlock()
+            done.fulfill()
+        }
+        XCTAssertTrue(submitted, "the fixture AU must parse")
+        wait(for: [done], timeout: 10)
+        box.lock.lock()
+        let result = box.planes
+        box.lock.unlock()
+        let planes = try XCTUnwrap(result, "the GPU pass must complete without error")
+        return (
+            try readback(planes.y, device: device, queue: queue),
+            try readback(planes.cb, device: device, queue: queue),
+            try readback(planes.cr, device: device, queue: queue)
+        )
+    }
+
+    private func readback(
+        _ texture: MTLTexture, device: MTLDevice, queue: MTLCommandQueue
+    ) throws -> [UInt8] {
+        let bytesPerRow = texture.width
+        let length = bytesPerRow * texture.height
+        let buffer = try XCTUnwrap(device.makeBuffer(length: length, options: .storageModeShared))
+        let cmd = try XCTUnwrap(queue.makeCommandBuffer())
+        let blit = try XCTUnwrap(cmd.makeBlitCommandEncoder())
+        blit.copy(
+            from: texture, sourceSlice: 0, sourceLevel: 0,
+            sourceOrigin: MTLOrigin(x: 0, y: 0, z: 0),
+            sourceSize: MTLSize(width: texture.width, height: texture.height, depth: 1),
+            to: buffer, destinationOffset: 0, destinationBytesPerRow: bytesPerRow,
+            destinationBytesPerImage: length)
+        blit.endEncoding()
+        cmd.commit()
+        cmd.waitUntilCompleted()
+        return [UInt8](UnsafeRawBufferPointer(start: buffer.contents(), count: length))
+    }
+
+    private func psnr(_ a: [UInt8], _ b: [UInt8]) -> Double {
+        precondition(a.count == b.count)
+        var sse = 0.0
+        for i in 0..<a.count {
+            let d = Double(a[i]) - Double(b[i])
+            sse += d * d
+        }
+        if sse == 0 { return .infinity }
+        let mse = sse / Double(a.count)
+        return 10 * log10(255.0 * 255.0 / mse)
+    }
+
+    private func assertMatchesReference(
+        _ decoded: (y: [UInt8], cb: [UInt8], cr: [UInt8]), prefix: String,
+        file: StaticString = #filePath, line: UInt = #line
+    ) throws {
+        for (name, plane, ref) in [
+            ("y", decoded.y, try fixture("\(prefix)-y")),
+            ("cb", decoded.cb, try fixture("\(prefix)-cb")),
+            ("cr", decoded.cr, try fixture("\(prefix)-cr")),
+        ] {
+            XCTAssertEqual(plane.count, ref.count, file: file, line: line)
+            let db = psnr(plane, [UInt8](ref))
+            print("pyrowave golden \(prefix) \(name): \(db) dB")
+            // The Metal port and upstream's decoder run the same math at the same precision
+            // tier; residual differences are float rounding + the gather/mirror edge handling.
+            // Well-matched ports measure ≫50 dB; 45 catches a real divergence long before it
+            // is visible.
+            XCTAssertGreaterThan(db, 45.0, "plane PSNR \(db) dB", file: file, line: line)
+        }
+    }
+
+    func testDenseGoldenFrame() throws {
+        try XCTSkipIf(!MetalWaveletDecoder.supported, "no capable Metal device")
+        let au = try fixture("au-dense")
+        let decoded = try decode(au: au, chunkAligned: false, windowSize: 0)
+        try assertMatchesReference(decoded, prefix: "ref-dense")
+    }
+
+    func testChunkAlignedGoldenFrame() throws {
+        try XCTSkipIf(!MetalWaveletDecoder.supported, "no capable Metal device")
+        let au = try fixture("au-chunked")
+        let decoded = try decode(au: au, chunkAligned: true, windowSize: 1408)
+        try assertMatchesReference(decoded, prefix: "ref-chunked")
+    }
+
+    /// Phase-4 partial delivery: zero a mid-AU window (a lost shard) — the frame must still
+    /// decode (blocks > half) and stay recognizably the same picture (holes reconstruct as
+    /// localized blur, not garbage).
+    func testPartialFrameStillDecodes() throws {
+        try XCTSkipIf(!MetalWaveletDecoder.supported, "no capable Metal device")
+        var au = try fixture("au-chunked")
+        let windows = au.count / 1408
+        try XCTSkipIf(windows < 3, "fixture too small to punch a hole in")
+        let hole = (windows / 2) * 1408
+        au.replaceSubrange(hole..<(hole + 1408), with: [UInt8](repeating: 0, count: 1408))
+        let decoded = try decode(au: au, chunkAligned: true, windowSize: 1408)
+        let ref = try fixture("ref-chunked-y")
+        let db = psnr(decoded.y, [UInt8](ref))
+        XCTAssertGreaterThan(db, 25.0, "lossy frame should still resemble the source (\(db) dB)")
+    }
+}
+#endif
--- a/Show More
+++ b/Show More