mirror of
https://github.com/turnstonelabs/turnstone.git
synced 2026-08-12 23:12:23 -06:00
Patrick Buckley
fd507c6a3c
* feat: generation cancellation — stop button, cancel API, cooperative cancel Add cooperative cancellation via threading.Event on ChatSession. The cancel signal is set from outside the worker thread (HTTP handler, MQ bridge, or Escape key) and checked at defined checkpoints: per streaming chunk, before tool execution, inside bash commands, and at each sub-agent turn. Core: GenerationCancelled(BaseException) exception, cancel()/_check_cancelled() methods, partial content preservation in _stream_response, clean rollback in send() with idle state emission (no re-raise). Server: POST /v1/api/cancel endpoint, CancelledEvent SSE emission, worker thread safety net. Frontend: Stop button (■ Stop) with send/stop swap via setBusy(), Escape key shortcut, cancelled event handler. Accessible: aria-label, focus-visible override, light theme contrast, non-color differentiation. MQ: CancelMessage inbound type, bridge _handle_cancel routed handler. SDK: cancel() on Python async+sync clients, CancelledEvent in Python+TypeScript event registries, isCancelledEvent type guard. OpenAPI: CancelRequest schema + endpoint spec. Docs: API reference, architecture, SDK docs updated. Diagrams: conversation turn, tool pipeline, MQ protocol, workstream states, SDK architecture. * fix: address PR #40 review feedback - setBusy() now resets stopBtn.disabled so stop button is re-enabled on next generation after a successful cancel - Gate cancel side effects (resolve_approval, resolve_plan, cancelled SSE event) on worker_thread.is_alive() to avoid spurious events when idle - Add /v1/api/cancel endpoint and CancelRequest schema to TypeScript openapi-server.json to keep it in sync with Python-generated spec