[d-morrison]

Ezra's standing rule (2026-11-02): "always cancel stale runs". On Ezra's decision (2026-11-03) to roll this out to every Morrison-Lab repo with PR CI, this adds a 17-line caller for Morrison-Lab/gha's cancel-superseded.yml (gha#1400, gha#1401, on v3). On every synchronize and closed of a pull request it cancels that PR's queued and running runs for any head other than the current one, and every earlier run of a closed PR. Runs not tied to a PR (push to main) are not covered. Not exercised before merge: the first live run is this PR's own next push or close.

---

Generated by Claude Code

[github-actions]

Claude finished review — View run

---

I fetched PR 29 live just now. It is open, not a draft, not merged, and its head is c26092e8a60827545e2c63822711f0a484a33f34. That is the commit I reviewed, so the verdict stands.

Findings

None. The diff adds one workflow file, .github/workflows/cancel-superseded.yml. It matches the examples/cancel-superseded.yml template in Morrison-Lab/gha and uses the same @v3 pin as the repo's other callers. It has no prose or math, so the content, macro and line-break rules don't apply.

Verdict

Ready for merge

Structured Review Data (JSON)

{
  "schema_version": "1.1",
  "reviewer": "claude",
  "commit_sha": "c26092e8a60827545e2c63822711f0a484a33f34",
  "verdict": "CLEAN",
  "findings": [],
  "detailed_assessment": "The new cancel-superseded.yml caller matches the gha example exactly: same triggers, the actions write and pull-requests read grants, and the @v3 pin used by sibling callers.",
  "holistic_assessment": "The change is scoped to a single new workflow with no content, math, or build-artifact changes, and it does not touch the publish or preview pipelines."
}

Reviewed commit: c26092e

[github-actions]

💰 Cost: $0.1999 (review) — run

[Copilot]

🟢 Approval recommended

No active review issues were identified for the workflow change to cancel stale pull-request CI runs.

No open issues 🎉

What changed in this PR

Adds a caller to the shared Morrison-Lab workflow to cancel stale PR CI runs, while leaving runs not associated with a PR unaffected.

Changes:

• Triggers cancellation when a pull request is synchronized or closed.
• Calls Morrison-Lab/gha’s reusable workflow at v3 with Actions write and pull-request read permissions.

File	Description
.github/​workflows/​cancel-superseded.yml	Adds the event triggers, permissions, and shared cancellation workflow call.

_{Review effort: Balanced}

[github-actions]

PR Preview Action v1.8.2
Preview removed because the pull request was closed.

_{2026-11-05 07:20 UTC}