Implementation

• Plumb the cot feature through the various layers in core and extension
  • Store data in chat history (summary, id, metadata)
  • Add cot data to chat debug logs
  • Get cot data by tool_call when constructing the request messages
  • BYOK
    • Use thinking data when provider does not use LM APIs (E.g Anthropic)
    • Use model specific endpoints to adjust messages

Chat UI Implementation 🎨

• Design UX for displaying thinking data in chat UI
• Implement LM API to stream cot information to core
• Develop Chat UI API for accessing thinking data

Ref: microsoft/vscode-copilot-release#11758