---
model: openai/gpt-5.6-sol
service: opencode
timestamp: 2026-08-24T22:20:33Z
git_ref: ce38cb6f
diff_cmd: git diff HEAD~1..HEAD
---

Implement the approved PR #481 review update for `Context.cancel()`.
Use one absolute deadline for both cancellation-request frame
publication and acknowledgement waiting, without broadening the change
to unrelated cancellation behavior.

> `git diff HEAD~1..HEAD -- tractor/_context.py`

`Context.cancel()` computes one absolute cancellation deadline, uses it
for the outer bounded wait, and forwards it through
`Portal._run_from_ns()` to shielded frame publication.

> `git diff HEAD~1..HEAD -- tests/test_to_actor.py`

A deterministic mocked-clock regression arranges a shielded blocked
publication and proves that `Context.cancel()` forwards the same deadline
which bounds the complete cancel transaction.

Run the focused cancellation deadline regressions after the edit.