Imported from Swader/alisay (skills/alisay-call/SKILL.md). Install upstream with npx skills add Swader/alisay --skill alisay-call. Copyright stays with the author.

Alisay Call

Core Workflow

Start every task by reading:

• /Users/swader/repos/alisay/docs/IMPLEMENTATION_AND_SPEC.md
• Relevant source files in /Users/swader/repos/alisay/src/, public/, tests/, and deploy/

Keep the app minimal: two people, one secret hash URL, no accounts, no database, no chat history, no recordings, no persistent room logs.

Use Bun commands from the repo root:

bun install
bun run test
bun run typecheck
bun run dev

Task Selection

• For code changes or tests, read references/local-debugging.md.
• For browser/WebRTC failures, read references/webrtc-turn-triage.md.
• For production deployment or server work, read references/production-deployment.md.

Safety Rules

• Treat room hash fragments, TURN secrets, cookies, certs, and env files as sensitive. Never print secret values.
• Keep server-side signaling schema strict; reject unknown message types instead of relaying arbitrary JSON.
• Keep /turn-credentials ephemeral and server-generated; never hardcode TURN passwords in frontend code.
• In production, require PUBLIC_ORIGIN, ALLOWED_ROOM_IDS, and ALLOW_OPEN_ROOMS=false; never publish live allowlist hashes because the signaling protocol admits that hash directly.
• Scope production changes to Alisay-owned paths only. Do not touch unrelated apps on a shared host.
• Do not deploy or mutate production unless the user explicitly asks. When deploying, verify both HTTP and WebSocket paths.

Expected Architecture

The Bun service serves static files, /healthz, /rooms, /ws, and a disabled-by-default /turn-credentials test endpoint.

The browser:

1. Keeps the secret room token in location.hash.
2. On bare visits, waits for Generate room before creating a hash token; existing hash invite links enable Start directly.
3. Registers only sha256(hash) through same-origin POST /rooms.
4. Opens /ws without a query string and sends sha256(hash) in the first join message.
5. Receives ICE servers only after WebSocket admission and refreshes near-expiry TURN credentials with refresh-ice.
6. Requests camera/microphone after signaling and Relay-only preflight succeeds.
7. Uses Relay-only mode by default and Auto mode as an option.
8. Exchanges offer/answer/ICE over the WebSocket.
9. Treats same-tab hash changes as a room switch: stop startup/call, recompute room state from the visible hash, and disable Copy invite until that room is registered and admitted over WebSocket.

The signaling server:

1. Allows at most two clients per room.
2. Admits static allowlisted rooms or same-origin generated rooms registered through /rooms, with active-room plus pending-reservation capacity checks and a per-IP generated-room cap that counts active generated rooms plus unjoined reservations.
3. Rejects room IDs in WebSocket URLs so proxy logs do not persist join-bearing room identifiers.
4. Relays only validated offer, answer, ice, and hangup.
5. Relays negotiation messages only after both peers are ready and negotiation has started.
6. Rate-limits post-upgrade signaling messages and configures WebSocket transport/backpressure caps.
7. Closes upgraded sockets that do not send join promptly.
8. Deletes empty rooms and expires inactive/generated rooms, with browser heartbeat keeping live sessions active.
9. Generates coturn REST credentials from TURN_SECRET only after room admission.

Verification Bar

For code changes, run at least:

bun run test
bun run typecheck

For call-path changes, also run:

bun run test:e2e

For manual browser confirmation, use two tabs:

1. Open the same hash URL in both tabs.
2. Start both sides.
3. Confirm local previews appear.
4. Confirm the signaling server emits peer-ready behavior.
5. Confirm mode-specific behavior: Relay-only requires TURN, Auto can run with STUN/TURN config.

For production checks, verify:

• <PUBLIC_ORIGIN>/healthz
• WebSocket upgrade on /ws without a room query
• a real browser relay-only call receives relayAvailable: true without exposing TURN_SECRET
• coturn is not an open relay
• the father’s actual network can reach the configured TURN routes

Handoff Discipline

Update /Users/swader/repos/alisay/docs/IMPLEMENTATION_AND_SPEC.md after meaningful behavior, config, deployment, or verification changes. Include what changed, what was verified, and which environment-only checks remain unverified.