---
model: gpt-5.6-sol
provider: openai
service: opencode
session: ses_0799212ebffe42arY96czXn89F
timestamp: 2026-07-27T21:59:06Z
git_ref: 689df816
scope: code
substantive: true
raw_file: 20260727T215906Z_689df816_prompt_io.raw.md
---

## Prompt

After the actor/SHM/Parquet integration test exposed a stale SHM triplet,
the user requested leak-cleaner machinery in the pytest harness using
Tractor's existing ownership and lifetime patterns.

## Response summary

Added creator-scoped SHM leak tracking to pytest without scanning
`/dev/shm` or treating attachments as owned. The fixture cooperates with
normal Tractor teardown, verifies POSIX object identity before fallback
cleanup, restores process-local token state, and fails after cleaning a
leak. Regressions cover the exact pre-actor-registration allocation window,
positional creators, and external attachment safety.

## Files changed

- `tests/conftest.py` - creator-scoped SHM leak tracking fixture
- `tests/test_shm_cleanup.py` - ownership and failure-window regressions
- `.claude/skills/run-tests/test-harness-reference.md`
  - document current-process SHM cleanup behavior
- `ai/prompt-io/opencode/20260727T215906Z_689df816_prompt_io.raw.md`
  - unedited response record
- `ai/prompt-io/opencode/20260727T215906Z_689df816_prompt_io.md`
  - provenance metadata and response summary

## Human edits

None - generated changes have not been edited by the human.