ci: gate CI on the release commit's subject, not a keyword scan - #90
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The release commit carried the CI-skip keyword so its own push would not retrigger the workflows on main. GitHub scans the WHOLE head-commit message for that keyword, body included, and a squash merge concatenates every commit message on the branch into the body. So any PR that merely discusses the keyword in prose disables every workflow for its merge commit. That is not hypothetical: it is what #89 did to itself. Its commits explained why the release commit carries the keyword, so the squash body contained the string four times and GitHub suppressed Release, PR checks and Bench for 4d6b57c. `gh run list --commit 4d6b57c` returns nothing at all -- no failure, no skipped run, no record -- so the merge that fixed the release looked identical to a merge that released. Five days and four releasable merges (#86, #87, #76, #89) sat unpublished before anyone noticed npm was stale. Each workflow's root job -- release.yml's `build`, pr-checks.yml's `detect-changes`, bench.yml's `gate` -- is now gated on github.event_name != 'push' || !startsWith(github.event.head_commit.message, 'chore(release): publish') and the release commit's message loses the keyword. Anchoring on the subject cannot be tripped by prose in a body: a commit can now discuss the mechanism, as this one does, without disabling CI. Every other job in all three workflows hangs off its root job and none use always(), so a skipped root skips the run. The trade is that a run is now created and skipped rather than never created, which is the point -- a skipped run is visible in the UI, an absent one is not. This makes the release commit's SUBJECT load-bearing across four files. Flagged at the `git commit` line, at each guard, and in tools/release/README.md. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
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📝 WalkthroughWalkthroughThe release workflow now creates commits with the ChangesRelease workflow guards
Estimated code review effort: 3 (Moderate) | ~20 minutes Merge Risk: 🟡 Moderate · up to The workflows now skip pushes whose subject merely starts with the release prefix, so an unrelated main commit could suppress release processing, checks, and benchmarks. Merge should wait for an exact-subject match or explicit owner acceptance. Suggested reviewers: 🚥 Pre-merge checks | ✅ 5✅ Passed checks (5 passed)
Full details: Docstring CoverageExplanation 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 files. (4 skipped: 4 unsupported.) ✨ Finishing Touches🧪 Generate unit tests (beta)
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Inline comments:
In @.github/workflows/release.yml:
- Line 80: Replace the startsWith release-commit checks with exact subject
comparisons against “chore(release): publish” in
.github/workflows/release.yml:80, .github/workflows/pr-checks.yml:64, and
.github/workflows/bench.yml:54; update tools/release/README.md:217 to document
the exact-match behavior.
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.github/workflows/bench.yml.github/workflows/pr-checks.yml.github/workflows/release.ymltools/release/README.md
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Review finding on #90: the guards matched the release commit by subject prefix alone, so any push to main whose subject opened with `chore(release): publish` would skip the release, the checks and the bench. The suggested fix was an exact `==` on the message. Taking the concern but not that fix, for two reasons. It does not actually close the hole. `==` still matches on message content alone, and a human can type the exact subject as easily as a prefix -- the scenario is no less reachable, only narrower by one character class. And it introduces a silent failure. `github.event.head_commit.message` is the whole message, not the subject; GitHub does strip the trailing newline (checked against the API for 6635578, which returns "chore(release): publish [skip ci]" with nothing after it), so equality matches today. But it stops matching the first time the release commit grows a body -- a commit template, a prepare-commit-msg hook, someone adding a second `-m`. Nothing enforces that invariant, and when it breaks the release commit gets benched and seeds a duplicate CodSpeed baseline. Quiet wrong numbers is the failure mode this repo is least equipped to notice. So the guards now require the subject prefix AND the committer identity: && github.event.head_commit.author.email == '41898282+github-actions[bot]@users.noreply.github.com' Only the release job's `git config` can produce that, so a human commit sharing the subject no longer skips anything -- strictly narrower than the exact match in the direction that matters, and still tolerant of message reformatting in the direction that is fragile. Noted at the `git config` step that the address is load-bearing, and documented in tools/release/README.md. Also fixed a YAML bug in the original guards: the continuation line was indented deeper than the first, and a `>-` folded scalar preserves a newline before a more-indented line, so the expression reached GitHub with a literal newline in it. All three now fold to a single line, verified by parsing. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
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Why
The merge of #89 released nothing, and left no trace that anything had gone wrong:
Not a failed run, not a skipped run — no run at all, for any of the three workflows. Five days and four releasable merges (#86, #87, #76, #89) sat unpublished; npm's newest
codec-openjphis still 2.4.9 from 2026-08-13.The release commit carries the CI-skip keyword so its own push doesn't retrigger the workflows on
main. GitHub scans the entire head-commit message for that keyword — body included — and a squash merge concatenates every commit message on the branch into the body. #89's commits explained why the release commit carries the keyword, so the squash body contained the string four times, in prose, and GitHub suppressed Release, PR checks and Bench for the merge.A PR that merely mentions the mechanism disables CI for its own merge. And because the runs are never created, there is nothing in the UI to notice.
What changes
Each workflow's root job —
release.yml'sbuild,pr-checks.yml'sdetect-changes,bench.yml'sgate— is gated on the release commit's subject instead:and the release commit message drops the keyword. Prose about the release commit is not the release commit, so a commit message can now discuss the mechanism — as this PR's does — without disabling CI.
Notes
always(), so a skipped root skips the whole run. Verified:grep -n 'always()' .github/workflows/*.ymlis empty.release.ymlwrites it; all three workflows match on it. Flagged at thegit commitline, at each guard, and intools/release/README.md.github.event.head_commitis null off the push event, so thegithub.event_name != 'push'clause keepspull_requestandworkflow_dispatchruns unconditional.Not in this PR
The release itself is still unpublished. This only stops the next occurrence — the backlog needs
gh workflow run release.yml --ref main(or a merge of this PR, which will trigger it) once someone is watching.I also noticed
release.yml's header comment still claims git auth isGITHUB_TOKENand that main's ruleset lists the GitHub Actions app as a bypass actor. #89 established that both are false. Left alone to keep this PR to one change; happy to fix it here or separately.🤖 Generated with Claude Code
Summary by CodeRabbit
Bug Fixes
[skip ci].Documentation