---
model: gpt-5.6-sol
provider: openai
service: opencode
timestamp: 2026-07-27T21:59:06Z
git_ref: 689df816
diff_cmd: git diff HEAD~1..HEAD
---

> `git diff HEAD~1..HEAD -- tests/conftest.py tests/test_shm_cleanup.py .claude/skills/run-tests/test-harness-reference.md`

Added function-scoped SHM ownership tracking around Tractor's test-process
factory. The fixture records only successful creators, removes ownership
records during normal Tractor teardown, verifies POSIX object identity
before fallback unlink, restores the token-cache baseline, and fails after
cleaning any leak. Regressions reproduce allocation failure before actor
lifetime registration and prove external attachments remain untouched.

Verification generated with the patch:

- SHM cleanup regressions: 2 passed
- combined SHM, NativeDB, and history set: 25 passed
- Ruff: passed
- `git diff --check`: passed
- final adversarial review: no findings
