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punktfunk/sdk/examples/couch-preset.effect.ts
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feat(sdk): @punktfunk/host — the Effect TypeScript SDK (M3)
New top-level sdk/ package (RFC §7): a typed management-API client plus
the lifecycle event stream, built on Effect, two surfaces over one core:

- @punktfunk/host — the Promise facade front door: connect() resolves
  URL/token/TLS pin from the host's own files (zero config on the box),
  fails fast on bad credentials, pf.events.on() with typed callbacks
  (exact kinds, domain.* prefixes, "*", "dropped", "unknown"),
  pf.request() for the REST surface. Effect never required.
- @punktfunk/host/effect — the PunktfunkHost service + PunktfunkHostLive
  layer, Stream-based events()/eventsRaw(), typed errors
  (AuthError | ApiError | TransportError | VersionSkew — a 2xx that
  fails its schema is a typed skew, not undefined later), and every
  wire shape as an effect/Schema: REST generated via orval
  client:'effect' from api/openapi.json (S3 spike: works well; the
  text/event-stream payload is out of its reach), events hand-mirrored
  from the host's snapshot-tested wire format as a kind-discriminated
  union.

One reconnecting SSE core under both surfaces: spec-shaped parser,
exponential+jittered backoff (capped, resets after a healthy
connection), Last-Event-ID resume, 401 terminal. Default is LIVE tail
only — a fresh notify script must not re-fire on the host's replayed
ring (since: 0 opts into full replay).

TLS: the pin trusts exactly the host's self-signed identity cert
(chain-verified; hostname check waived — the cert is deliberately
CN-only for fingerprint pinning). Bun via fetch tls, Node via an undici
dispatcher (optionalDependency).

definePlugin() accepts both main shapes (async fn | Effect requiring
PunktfunkHost). Examples in both styles; README carries the compat
contract + systemd/Task Scheduler templates.

11 bun tests green (wire decode against the Rust snapshot strings,
SSE parser/reconnect/Last-Event-ID/401, both surfaces vs a mock host).
Live-verified against a real host on Bun AND Node through the pinned
loopback hop: connect → REST mutate → live event received → resume
cursor advanced; a wrong CA is rejected. npm publish + CI wiring
deferred (npm org = RFC open question 1).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
2026-07-17 00:14:39 +02:00

21 lines
766 B
TypeScript

// The RFC §7 quickstart, Effect-native: when the living-room TV starts a stream, apply a
// display preset — a composed, typed, interruptible program.
import { Effect, Stream } from "effect";
import { events, PunktfunkHost, PunktfunkHostLive } from "../src/effect.js";
const program = Effect.gen(function* () {
const pf = yield* PunktfunkHost;
yield* events().pipe(
Stream.filter(
(e) => e.kind === "stream.started" && e.stream.client === "Living Room TV",
),
Stream.runForEach(() =>
pf
.request("PUT", "/display/settings", { mode: "preset", preset: "couch" })
.pipe(Effect.catchAll((e) => Effect.logWarning(`preset failed: ${e}`))),
),
);
});
Effect.runPromise(program.pipe(Effect.provide(PunktfunkHostLive()))).catch(console.error);