Ed Zynda a1decf9cff feat: add SubscribeSubagent API for per-tool-call event streaming ...

Add Kit.SubscribeSubagent(toolCallID, listener) which lets SDK consumers
opt into real-time events from LLM-initiated subagents. Listeners are
keyed by the spawn_subagent tool call ID, which is available in the
ToolCallEvent before the subagent starts.

The typical pattern is:

    kit.OnToolCall(func(e kit.ToolCallEvent) {
        if e.ToolName == "spawn_subagent" {
            kit.SubscribeSubagent(e.ToolCallID, func(child kit.Event) {
                // real-time subagent events
            })
        }
    })

Implementation:
- Thread toolCallID through SubagentSpawnFunc so generate() knows which
  tool call triggered the spawn
- Add subagentListenerSet (per-tool-call event bus) stored in a sync.Map
  on the Kit struct, keyed by toolCallID
- In generate(), wire OnEvent to dispatch to registered listeners only
  when SubscribeSubagent has been called for that tool call
- Listeners are cleaned up automatically when the subagent completes
- No listeners registered = no OnEvent callback = no overhead (the
  default TUI path)

2026-03-21 20:48:40 +03:00

..

extensions/test

refactor: move extension testing package to pkg/

2026-03-20 13:40:15 +03:00

kit

feat: add SubscribeSubagent API for per-tool-call event streaming

2026-03-21 20:48:40 +03:00