# KIMU 5.2.0 Increment 40 R1 release notes

## Specification and feature-lock update

- Added Comprehensive Technical Build Specification R3.
- Feature-locked Tools Runtime, realtime Conversation Mode, Website Builder and Agent Swarm.
- Locked implementation order: Tools → Conversation Mode → Website Builder → Swarm.
- Replaced the former Browser STT/HTTP voice placeholder with Whisper Large v3 and Sonic 3 WebSocket Conversation Mode.
- Locked true barge-in: browser stop, queue discard, Sonic `context.cancel`, Kimi generation cancellation, stale-event rejection and listening resume.
- Added machine-readable `config/feature-locks.json`.
- Added frontend and static regression checks for locked requirements.

## Preserved

No existing operational Increment 40 feature was removed or reclassified. The newly detailed modules remain truthful placeholders.