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docs(auto-merge): reusable-workflow migration renames required checks - #182

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CybotTM merged 2 commits into
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@CybotTM

@CybotTM CybotTM commented Sep 8, 2026

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auto-merge-guide.md already covers "required checks vs actual check names" and merge-queue behaviour, but not the migration case, which is where the two meet and bite.

Converting an inline job to uses: …/reusable.yml@main renames its check: a called workflow reports as <caller job name> / <inner job name>, and the / segment is always inserted, so an inline Tests (8.2) becomes at best Tests / Tests (PHP 8.2). On a repository with required status checks the old context then never reports again — and a required context that never reports blocks merges indefinitely while every visible check is green.

Two further consequences were only obvious once measured on a real migration in TYPO3-Documentation/render-guides:

There is no ordering that keeps the gate closed. Switching the ruleset first blocks every other open PR, whose checks still report the old names; merging first blocks the queue. The workable sequence is to drop the required contexts for the merge window and set the new ones straight afterwards — a deliberate short window, not something to find out about halfway through a merge.

Commands that ran as steps inside a required job are implicitly required. Split into their own called jobs they become separate checks and gate nothing unless the ruleset lists them. In the case above composer normalize --dry-run, make test-docs and make test-rendertest would have gone from required to optional as a side effect of a change whose stated subject was centralising action versions.

The section also gives the check-runs query for reading the resulting names from an actual run, because the inner job name lives in the called workflow in another repository and can carry its own matrix suffix — predicting it is guesswork.

Assisted by claude-code:claude-opus-5 — Session

A called workflow reports as `<caller job> / <inner job>`, so converting
an inline job to `uses:` renames its context even when the job id stays.
On a repo with required status checks the old context never reports
again and merges block forever with every visible check green.

Three consequences from one render-guides migration: the ruleset must
change in the same step, because the ` / ` segment cannot be avoided; no
ordering keeps the gate closed, so the required contexts have to be
dropped for the merge window; and commands that ran as steps inside a
required job become separate checks that gate nothing unless the ruleset
lists them, which silently weakens the gate.

Adds the check-runs query to read the new names from a real run instead
of predicting them.

Assisted-by: claude-code:claude-opus-5
Agent-Session: https://claude.ai/code/session_012etUMBrLPHyPV3bZFhZsiZ
Agent-Host: 0493f0
Signed-off-by: Sebastian Mendel <github@sebastianmendel.de>
Copilot AI lite review requested due to automatic review settings September 8, 2026 16:53
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@github-actions github-actions Bot added documentation Improvements or additions to documentation skill labels Sep 8, 2026

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  • skills/github-project/references/auto-merge-guide.md
📝 Walkthrough

Walkthrough

The auto-merge guide now documents that reusable workflows rename checks to <caller job name> / <inner job name>. It explains how stale required checks can leave merges permanently blocked despite green visible checks. It describes ruleset update timing, newly ungated jobs, check-name discovery through the check-runs API, and suffix-based matching.

Priority: ➖ Normal — Schedule the auto-merge guide update because reusable-workflow migrations can leave required checks permanently blocking merges.

Severity of issue fixed: Medium

Merge Risk: 🟡 Moderate · up to 81855

This guide documents how to preserve required checks during reusable-workflow migrations, but its check-name lookup command will not target the repository and its suffix guidance can lead to pending required checks. Correcting these instructions is needed before relying on the guide for branch-protection changes.

🚥 Pre-merge checks | ✅ 5
✅ Passed checks (5 passed)
Check name Status Explanation
Title check ✅ Passed The title clearly and concisely identifies the documentation change about required-check renames during reusable-workflow migration.
Description check ✅ Passed The description directly explains the documented migration behavior, merge-blocking risk, ruleset update sequence, and check-runs query.
Docstring Coverage ✅ Passed No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 0…
Linked Issues check ✅ Passed Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check ✅ Passed Check skipped because no linked issues were found for this pull request.
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Actionable comments posted: 3

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Inline comments:
In `@skills/github-project/references/auto-merge-guide.md`:
- Around line 325-326: Update the guidance around check-name matching to
restrict suffix matching to discovering the correct check run; configure
required contexts using that run’s complete emitted name via `.name`, such as
“Tests / Tests (PHP 8.2)”, rather than the suffix alone. Preserve the existing
warning against `==` comparisons.
- Line 317: Update the reusable-workflow description near “name lives in the
called workflow” to state that the workflow may be located in the same
repository or another repository, removing the cross-repository-only qualifier.
- Line 321: Update the gh api command for retrieving check runs to use the valid
{owner}/{repo} repository placeholders instead of :owner/:repo, while preserving
the existing <head-sha> path and pagination behavior.

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Review on #182 caught three things in the new migration section.

A required context is compared for equality, so the closing advice to
"match by suffix" was wrong where it mattered most: a suffix put into
the ruleset matches nothing and leaves the check pending. Suffix
matching belongs to discovery and to your own filtering code, not to
the ruleset entry, which needs the complete emitted name.

The command now uses gh's documented {owner}/{repo} placeholders, and
the sentence about the called workflow no longer asserts it lives in
another repository — it may sit in the same one.

Assisted-by: claude-code:claude-opus-5
Agent-Session: https://claude.ai/code/session_012etUMBrLPHyPV3bZFhZsiZ
Agent-Host: 0493f0
Signed-off-by: Sebastian Mendel <github@sebastianmendel.de>
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@CybotTM

CybotTM commented Sep 8, 2026

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Self-review: 5652cf0

The review this pull request demands is unsatisfiable (Copilot quota wall or repeated bot failures on this head). Per the documented fallback, the diff on this head was reviewed by the PR author; this comment is the on-the-record attestation the merge gate reads back. It stops matching on the next push.

@CybotTM
CybotTM merged commit f61861e into main Sep 8, 2026
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@CybotTM
CybotTM deleted the docs/reusable-migration-renames-required-checks branch September 8, 2026 17:06
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