work: h051-056-merge-apply-stale-ci-abort-regression

[ExatronOmega]

Summary

• Signposter handoff for issue H051-056 — Merge apply stale-CI abort regression #586.
• Source branch: work/issue-586-h051-056-merge-apply-stale-ci-abort-regression
• Base branch: main

Changed files

• tests/test_merge.py

Safety notes

• Generated by Signposter PR planning surface.
• No merge or issue close is implied by this PR.
• Issue should remain open until explicit integration/close policy.

Related issue: #586

[AlphaExatron]

Signposter reviewer gate: APPROVE

Confidence: 0.91
Risk: high
Scope match: yes
CI considered: yes
Merge recommendation: yes
Automerge eligible: no

Findings:

• The PR is test-only and changes only tests/test_merge.py.
• The regression covers stale CI between a ready dry-run merge plan and apply-time merge execution.
• The apply-time path is expected to re-plan, block on failing CI, and avoid invoking gh pr merge.
• No runtime merge behavior, GitHub mutation behavior, or issue closure behavior changes are introduced.
• Local validation and PR CI passed for the PR head commit.

Summary:
Reviewer approved this change.

No merge or issue close is implied by this review.