- Export chat.stream (typed RealtimeDefinedStream<UIMessageChunk>) for writing custom data to the chat stream
- Add deepResearch subtask using data-* chunks to stream progress back to parent chat via target: root
- Use AI SDK data-research-progress chunk protocol with id-based updates for live progress
- Add ResearchProgress component and generic data-* fallback renderer in frontend
- Persist model per chat in DB (schema + onChatStart), model selector only on new chats
- Add collapsible debug panel showing run ID (with dashboard link), chat ID, model, status, session info
- Document chat.stream API, data-* chunks, and subtask streaming pattern in docs
Eric Allam
2101829404