Layer an optional realtime speech-to-text path on top of the existing
batch dictation, so transcribed text appears as the user speaks.
Transport A2: browser <-> our server (Socket.IO `/ai-realtime`) <->
OpenAI Realtime (raw ws). The provider API key never leaves the server;
the upstream URL is SSRF-checked before connecting; the gateway enforces
the dictation+dictationRealtime gate, cookie-JWT auth and per-user/
per-workspace concurrency caps. Implemented against the GA (2026) OpenAI
Realtime transcription contract (session.update / audio.input.format /
server_vad), not the now-removed beta shape.
Editor UI B2: interim text is shown as a meta-only ProseMirror ghost
decoration (no Yjs/history noise); only completed segments are committed.
Chat shows interim as a dimmed tail. The mic button switches realtime vs
batch by the workspace flag; batch remains the default and fallback.
Server:
- AiRealtimeService (upstream ws proxy, normalized events, idle/max-
duration timeouts, idempotent teardown) + parseUpstreamEvent unit tests
- AiRealtimeGateway (Socket.IO `/ai-realtime`) wired into AiChatModule
- admin-gated POST /ai-chat/realtime/test connectivity probe
- config: settings.ai.dictationRealtime + provider sttRealtimeModel/
sttRealtimeBaseUrl (realtime key reuses sttApiKey; no new secret)
Client:
- pcm16 AudioWorklet (24kHz mono PCM16), RealtimeDictationClient,
use-realtime-dictation hook (status/start/stop/cancel + onInterim/onFinal)
- RealtimeMicButton + dictation-interim ProseMirror decoration
- editor/chat integration + AI settings UI (toggle, model, test endpoint)
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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