CoderPane hydrates from the HTTP listMessages fetch (SELECT has model) AND the WS snapshot frame, and the snapshot handler setMessages-overwrites the HTTP load. The snapshot query in apps/coder/src/routes/ws.ts had its own column list that omitted model, so on coder refresh the chip's model was lost (it showed live via the message_complete frame). One-column fix: add model to that SELECT. CLAUDE.md mapper-chain note updated to list the WS snapshot SELECT. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>