riotpiao.com/tasks/5.9-queue-position-sse.md

5.9 — Queue position streamed as SSE (mock, GREEN)

Phase: 5 — Chat + Rate Limiter (Surface D) Stage: GREEN

• Queue position streamed as SSE {"type":"queue","position":N}

Done — app/api/chat/route.ts counts down a fixed position (3 -> 1) before replying. Mock only: not driven by a real semaphore/queue depth. See REQUIREMENTS.md.