Skip closed-PR follow-up workflows on Copilot branches

[Copilot]

Two closed-PR workflows started clustering at action_required on 2026-07-11, matching the Copilot CLI hang-on-exit pattern. The failures were isolated to copilot/* branches; non-Copilot branches continued to behave normally.

• Scope

  • Label Closed PRs
  • PR Description Updater

• Change

  • Add a branch guard so these workflows do not run for pull requests whose head ref starts with copilot/.
  • Recompile pr-description-caveman.lock.yml so the generated workflow preserves the same condition.

• Behavior

  • PR Description Updater now skips merged Copilot-agent PRs instead of entering the closed-PR action_required path.
  • Label Closed PRs now skips unmerged Copilot-agent PRs instead of attempting closure classification on those branches.
  • Existing behavior for non-copilot/* branches is unchanged.

• Implementation

  • Source workflow guard:

    if: github.event.pull_request.merged == true &&
        !startsWith(github.event.pull_request.head.ref, 'signed/jsweep/') &&
        !startsWith(github.event.pull_request.head.ref, 'copilot/')

  • Job-level guard:

    if: github.event.pull_request.merged == false &&
        !startsWith(github.event.pull_request.head.ref, 'copilot/')

[Copilot]

Pull request overview

Adds copilot/* branch guards to prevent problematic closed-PR follow-up runs.

Changes:

• Skips PR description updates for merged Copilot branches.
• Skips closure labeling for unmerged Copilot branches.
• Recompiles the generated workflow.

Show a summary per file

File	Description
.github/workflows/pr-description-caveman.md	Adds the source workflow guard.
.github/workflows/pr-description-caveman.lock.yml	Propagates the guard into generated jobs.
.github/workflows/label-closed-prs.yml	Adds the closure-labeling job guard.

Review details

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• Files reviewed: 3/3 changed files
• Comments generated: 0
• Review effort level: Medium

[github-actions]

🎉 This pull request is included in a new release.

Release: v0.82.9