nexus/.planning/phases/36-voice-pipeline-foundation/36-03-SUMMARY.md

phase	plan	subsystem	tags	requires	provides	affects	tech-stack	key-files	key-decisions	patterns-established	requirements-completed	duration	completed
36-voice-pipeline-foundation	03	api	express multer voice whisper piper sse tts stt	phase provides 36-01 voicePipelineService with transcribe/synthesize/formatForVoice phase provides 36-02 voiceMode field on createMessageSchema and ChatMessage interface	POST /api/transcribe HTTP endpoint (audio upload → VoicePipelineService.transcribe) POST /api/synthesize HTTP endpoint (text body → VoicePipelineService.synthesize → audio/wav) voiceMode flag wired through chat stream endpoint with dual-output prompt injection (VPIPE-06) voiceMode persisted to messageType column on assistant message save Old inline /transcribe endpoint removed from chat-files.ts	phase-37-voice-web-ui (uses POST /api/transcribe and POST /api/synthesize from browser) phase-38-telegram-bridge (uses POST /api/transcribe and POST /api/synthesize from Telegram)	added patterns voiceRoutes() factory function pattern matching chatFileRoutes() multer.memoryStorage() for audio upload in dedicated voice route dual-output SSE prompt injection — full_voice mode appends SPOKEN:/DETAILED: system message voiceMode-to-messageType mapping: full_voice→voice_full, voice_input→voice_input	created modified server/src/routes/voice.ts server/src/__tests__/36-voice-routes.test.ts server/src/routes/chat.ts server/src/routes/chat-files.ts server/src/app.ts	Voice routes are a dedicated module (voice.ts) rather than added to chat-files.ts for clean separation of concerns assertBoard(req) on both voice endpoints — same auth pattern as all other board-facing API routes voiceMode destructured as typed union in stream endpoint to enable compile-time safety	Dual-output prompt: SPOKEN: section for TTS delivery, DETAILED: section for full markdown messageType column stores voice_full/voice_input for downstream rendering decisions	VPIPE-03 VPIPE-06	25min	2026-04-04

Phase 36 Plan 03: Voice HTTP Routes + voiceMode Wiring Summary

Voice pipeline HTTP-accessible via POST /api/transcribe and POST /api/synthesize, with full_voice dual-output prompt injection and messageType persistence in the SSE stream endpoint

Performance

• Duration: 25 min
• Started: 2026-04-04T01:33:00Z
• Completed: 2026-04-04T01:58:00Z
• Tasks: 2
• Files modified: 5

Accomplishments

• Created server/src/routes/voice.ts with POST /transcribe (multer audio upload → VoicePipelineService) and POST /synthesize (text → audio/wav buffer), both protected by assertBoard(req)
• Wired voiceMode through the chat stream endpoint: full_voice triggers dual-output SPOKEN:/DETAILED: system prompt injection; voice_input/full_voice persist to messageType column
• Removed 90-line inline /transcribe implementation from chat-files.ts and mounted voiceRoutes() in app.ts
• 5 integration tests pass covering both success and error cases for both endpoints

Task Commits

1. Task 1: Create voice.ts routes and tests - b49b0aa5 (feat + TDD)
2. Task 2: Wire voiceMode in chat.ts, mount voice routes, remove old transcribe - 3fc1ac10 (feat)

Files Created/Modified

• server/src/routes/voice.ts — New voice routes factory: POST /transcribe and POST /synthesize
• server/src/__tests__/36-voice-routes.test.ts — 5 integration tests for both endpoints
• server/src/routes/chat.ts — voiceMode destructured, dual-output prompt injected, messageType persisted
• server/src/routes/chat-files.ts — Removed old inline /transcribe endpoint (90 lines removed)
• server/src/app.ts — Imported voiceRoutes and mounted with api.use(voiceRoutes())

Decisions Made

• Voice routes are a dedicated voice.ts module rather than added to chat-files.ts for clean separation — voice pipeline is its own subsystem
• Both voice endpoints call assertBoard(req) for consistent auth with all other board-facing routes
• voiceMode typed as "text" | "voice_input" | "full_voice" union in stream endpoint for compile-time correctness

Deviations from Plan

None — plan executed exactly as written.

Note: Pre-existing TypeScript errors in voice-pipeline.ts (from Plan 36-01, ffmpeg-static type mismatch) were not caused by this plan's changes. Files modified in this plan compile clean.

Issues Encountered

• Worktree node_modules resolution: vitest from the worktree couldn't resolve express/supertest because the worktree has an empty local node_modules. Fixed by creating symlinks from the worktree's node_modules and server/node_modules to the main repo's equivalents. This is a one-time setup for the parallel worktree environment.

User Setup Required

None — no external service configuration required.

Next Phase Readiness

• Voice pipeline is fully HTTP-accessible from any transport (web, Telegram, CLI)
• Phase 37 (voice web UI) can use POST /api/transcribe and POST /api/synthesize directly
• Phase 38 (Telegram bridge) can use the same endpoints for voice message relay
• voiceMode flag flows end-to-end: client request body → dual-output prompt → messageType persistence

Self-Check: PASSED

• voice.ts: FOUND
• 36-voice-routes.test.ts: FOUND
• 36-03-SUMMARY.md: FOUND
• commit b49b0aa5: FOUND
• commit 3fc1ac10: FOUND

---

Phase: 36-voice-pipeline-foundation Completed: 2026-04-04