Glossary

• Path A: the command-response path from a user message to a rendered result
• Path B: the event path from backend streaming events to IM output
• BackendIdentity: the backend identity value object that consistently represents backendId / model / transport
• ThreadRecord: persistent thread state at the project scope
• UserThreadBinding: the user-scoped pointer to the active thread
• RuntimeConfig: per-turn runtime configuration
• Orchestrator: the coordination layer responsible for threads, backends, events, and Turn lifecycle
• FeishuOutputAdapter: the Feishu output adapter, which plays different roles on the two main paths