---
model: openai/gpt-5.6-sol
service: opencode
timestamp: 2026-08-18T19:30:04Z
git_ref: bf06b4f8
diff_cmd: git diff HEAD~1..HEAD
---

`Actor.start_remote_task()` inserts a context before sending `Start`,
but startup errors other than cancellation escape without removing or
closing that caller state. Serialization errors, acknowledgement
timeouts, malformed acknowledgements and remote authorization errors
can therefore leak context-registry entries.

> `git diff HEAD~1..HEAD -- tractor/runtime/_runtime.py tests/test_context_stream_semantics.py`

Cover the complete send, acknowledgement and validation phase with
exceptional cleanup. Attempt remote cancellation only when publication
is known complete or protocol-safe, and always release local state.