The pairing/renegotiation batch bumped the punktfunk/1 ABI to v2 and the host now
hard-rejects v1 Hellos (m3.rs), so streaming from the Mac was dead until the bundled
PunktfunkCore.xcframework is rebuilt — it is gitignored, so that is a per-checkout step:
bash scripts/build-xcframework.sh. The Swift wrapper itself was already adapted upstream;
this lands the app on top of it.
- ClientIdentityStore: persistent client identity in the login Keychain, presented on
every connect so paired hosts recognize this Mac. Keychain access failure throws
instead of regenerating (a fresh identity would silently un-pair this Mac from every
--require-pairing host); a lost first-run race resolves toward the stored identity;
pairing uses the strict loadForPairing() so a memory-only identity can't strand a
ceremony.
- PairSheet: the SPAKE2 PIN ceremony, reachable from a host card's context menu and from
the trust prompt's "Pair with PIN instead…" (which drops the live session first — the
host's accept loop is sequential). Success pins the verified fingerprint and connects;
an in-flight ceremony self-discards when the sheet is dismissed, so a late success
can't pin + auto-connect behind the user's back. Wrong PIN and Keychain failures get
distinct, actionable error text.
- Tests: identity unit tests; the full pairing ceremony + --require-pairing gate on
loopback (test-loopback.sh arms a second host, parses its PIN from the log, and gives
both hosts throwaway config homes — no more writes to the real ~/.config/punktfunk);
remote pairing + pinned stream over the LAN (PUNKTFUNK_REMOTE_PIN, _PORT).
Validated live against the box: SPAKE2 ceremony with the host's arming PIN → verified
fingerprint → pinned + identified 720p60 session (host persisted the client identity);
first light 60/60 AUs decoded to pixels; vkcube on glass through the app.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
The app grows from a dev connect form into a real client shell:
- Home is a grid of saved hosts (UserDefaults-persisted; context menu: Remove / Forget
Identity), "+" in the toolbar opens the add-host sheet, the stream mode moved into
Settings (⌘, / gear) — native resolution stays the only mode, no scaling.
- Trust is now explicit: the protocol always supported certificate pinning, but the app
passed no pin and discarded the observed fingerprint — silently trusting any host.
First connect now shows the host's SHA-256 fingerprint (compare with the "clients pin
this fingerprint" line in the host log) over the live-but-blurred stream; the stream
must pump immediately (the opening IDR is the only guaranteed one), so StreamView gains
a capturesCursor switch to keep the cursor free while the prompt needs clicking, and
input capture starts only after confirmation. Trusting pins the fingerprint per host;
a changed host identity then refuses to connect.
- PUNKTFUNK_AUTOCONNECT keeps working (auto-trusts, doesn't touch the saved hosts).
Host→client authorization (pairing PIN) remains a punktfunk-core roadmap item — the host
still accepts any client that can reach its port.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
enricobuehler