fix: merge the Unity package release pull request only from automation by hatayama · Pull Request #2710 · hatayama/unity-cli-loop

hatayama · 2026-09-08T12:36:35Z

Why

The Unity package release pull request was marked ready once its checks passed, so a person could merge it before the dispatcher it must ship was released and stamped. That reopens the generation lag ADR 0007 removed. It also exposed a narrower window: between the dispatcher merge and the pin stamp, check-package-release-pin is green on a head whose pin is already stale, so a merge there ships an old dispatcher with a valid-looking release.

Operational rules ("merge the dispatcher first", "wait for the stamp") are not something to rely on here.

What changes

The unity-package release pull request now stays draft, and only automation merges it. Each path lifts the draft immediately before merging.

release-please.yml gains a merge step for the case post-publish never covers: a package release with no dispatcher bump. It merges only while no dispatcher release pull request is open and the pin at the package head records the dispatcher version the base branch manifest releases; otherwise it leaves the pull request draft and reconsiders on the next push (--no-wait, so no runner is held open). It mints the same GitHub App token post-publish uses — a merge made with GITHUB_TOKEN starts no follow-up workflow run, so the package release would never be tagged.
dispatcher-publish.yml's post-publish keeps its arguments. It must not require the absence of an open dispatcher pull request: by the time it runs, the next cycle's dispatcher release can already be pending, and requiring its absence would make it wait out its timeout on every second release.
The merge helper no longer treats draft as a reason to wait. Draft was never evidence that a head was checked; a successful run of every required workflow for that exact head SHA, held there by --match-head-commit, is.

The two new steps in release-please.yml also run when the dispatch step failed. That step reports a failure when any component's checks fail, and a failing project runner release must not strand a package-only release until the next push. The merge helper verifies the package head's own runs, so another component's failure cannot make it merge something unchecked; the job still fails on the dispatch step.

Limits

This prevents a misplaced click, not a determined one. Anyone with write access can press "Ready for review" and merge — two deliberate actions instead of one. Correctness enforcement stays with check-package-pin-consistency, which fails the release commit itself. Recorded in the ADR 0007 amendment.

Verification

scripts/check-go-cli.sh passes (format, vet, lint, tests, build); check-file-length reports no findings.
Fault injection confirms the tests cover the properties, not just the code paths — each of these makes its test fail:
- disabling the open-dispatcher gate → the "leaves draft while a dispatcher release is pending" test fails
- removing the gh pr ready call → the "readies draft then merges" test fails
- removing the unity-package branch in finalizeReleasePRChecks → the "leaves the package pull request draft" test fails

Rollout

After this merges, the next push to main rebases the pending release pull requests, and the new finalize leaves chore(main): release 3.6.0 #2703 (unity-package) draft.
Merge chore(main): release dispatcher 3.5.0 #2702 (dispatcher) only after this pull request. Merging it first runs post-publish from the old code; the package pull request would then be merged the old way only if the old finalize had already marked it ready.
chore(main): release 3.6.0 #2703 is not merged by hand. post-publish marks it ready and merges it after the pin stamp.
Expected end state: v3.6.0 created by release-please, with its pin recording dispatcher-v3.5.0.

https://claude.ai/code/session_01NAvyV1iyDTfY4NHQrEU4Jd

The Unity package release merge gate has to reason about commits that are not in the workflow checkout: the pin at a pull request head, and the dispatcher version the base branch tip releases. Both come from the contents API, and the base64 unwrapping was already duplicated inside the pin reader. Collect the three reads the gate needs -- file content at a ref, the dispatcher release tag from the release manifest at a ref, and whether a dispatcher release pull request is still open -- in one file, and route the existing pin reader through the shared content helper. The dispatcher listing deliberately does not filter on the pending label: a release pull request that lost its label is still a dispatcher release the package must not overtake. Claude-Session: https://claude.ai/code/session_01NAvyV1iyDTfY4NHQrEU4Jd

The Unity package release pull request is about to stay draft permanently, so the merge helper can no longer wait for someone else to make it ready. It now marks the pull request ready itself, immediately before merging, and only when it is actually draft -- gh pr ready fails on one that is already ready. Dropping the draft wait loses nothing. Draft was never evidence that a head was checked; what proves that is a successful run of every required workflow for that exact head SHA, held to that head by --match-head-commit. The comment on that branch now says so. Two flags make the helper usable from release-please.yml as well as from post-publish. --require-no-open-dispatcher-pr refuses to merge while a dispatcher release pull request is open, and settles at once rather than polling, because that state is resolved by a release and a stamp rather than by waiting. --no-wait decides once and leaves the pull request draft, so the release-please run does not hold a runner open for the timeout. An omitted --dispatcher-tag is resolved from the base branch release manifest, which is the value the release-please path has to compare the head pin against. Claude-Session: https://claude.ai/code/session_01NAvyV1iyDTfY4NHQrEU4Jd

Marking the package release pull request ready after its checks passed let a person merge it before the dispatcher it must ship was released and stamped, which reopens the generation lag the split release pull requests removed. It also exposed a narrower window: between the dispatcher merge and the pin stamp, the package head's checks are green on a pin that is already stale. The finalize step now leaves that one component draft and says why. The other components are unaffected -- the dispatcher and project runner release pull requests are still the ones people merge. Merging the package release is left entirely to the two automated paths, which lift the draft themselves. Claude-Session: https://claude.ai/code/session_01NAvyV1iyDTfY4NHQrEU4Jd

A package release that carries no dispatcher bump never reaches post-publish, so with the pull request now permanently draft it would never be merged at all. release-please.yml gains that path: after the release PR checks it mints the same App token post-publish uses and runs the merge helper with --require-no-open-dispatcher-pr --no-wait. The App token is not optional -- a merge made with GITHUB_TOKEN starts no follow-up workflow run, so the package release would never be tagged. The two new steps also run when the dispatch step failed. That step reports a failure when any component's checks fail, and a failing project runner release must not strand a package-only release until the next push. The merge helper verifies the package head's own runs, so another component's failure cannot make it merge something unchecked; the job still fails on the dispatch step. post-publish keeps its arguments. It must not require the absence of an open dispatcher pull request: by the time it runs, the next cycle's dispatcher release can already be pending. Claude-Session: https://claude.ai/code/session_01NAvyV1iyDTfY4NHQrEU4Jd

State the new shape where the release order is documented: the unity-package release pull request stays draft, the two automated paths that merge it, and why their conditions differ. An open dispatcher pull request disappearing is not proof the stamp landed -- the pull request closes on merge and the stamp arrives 15-25 minutes later -- so the release-please path also requires the head pin to match what main's manifest releases, while post-publish requires only the tag it just published. The manual checklist keeps its place for the cases automation does not cover, with the draft condition turned into the two deliberate actions a person now has to take, plus what to do when a pre-release or a failed stamp leaves the pull request waiting. ADR 0007 records the amendment, including its limit: this prevents a misplaced click, not a determined one. Claude-Session: https://claude.ai/code/session_01NAvyV1iyDTfY4NHQrEU4Jd

coderabbitai · 2026-09-08T12:37:29Z

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cli/release-automation/internal/automation/package_release_pr_merge_test.go

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cli/release-automation/internal/automation/package_release_pr_merge_test.go

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📝 Walkthrough

Walkthrough

The release process keeps Unity package release pull requests in draft. Automation checks the dispatcher manifest, pin, open dispatcher pull requests, and workflow results before readying and merging the package pull request.

Changes

Package release merge automation

Layer / File(s)	Summary
Dispatcher state and merge command `cli/release-automation/internal/automation/package_release_pr_gate.go`, `cli/release-automation/internal/automation/package_release_pr_merge.go`, `cli/release-automation/internal/automation/package_release_pr_merge_test.go`	The merge command resolves dispatcher tags from the release manifest, checks open dispatcher pull requests, supports `--require-no-open-dispatcher-pr` and `--no-wait`, and readies draft pull requests after checks pass. Tests cover the new gates and merge paths.
Release PR draft policy `cli/release-automation/internal/automation/release_pr_checks.go`, `cli/release-automation/internal/automation/release_pr_checks_test.go`	Unity package release pull requests remain draft while dispatcher pull requests can become ready. Tests cover success and failure paths.
Workflow merge wiring `.github/workflows/release-please.yml`, `.github/workflows/dispatcher-publish.yml`	The workflows mint an app token and run the package merge command under the configured dispatcher and pin conditions.
Release process guidance `AGENTS.md`, `docs/adr/0007-separate-release-prs-and-package-auto-merge.md`, `docs/dispatcher-pin-release-order.md`	The release guidance describes draft package pull requests, automated merge paths, pin checks, and manual recovery conditions.

Priority: ➖ Normal — Schedule this Unity package release automation change because it alters multiple gated workflows that control release ordering and automated merging.

Estimated code review effort: 4 (Complex) | ~45 minutes

Merge Risk: ⚪ Minimal · up to 1d204

The change tightens release-merge test coverage to require the expected pull request and head commit in the merge command. No current merge-blocking risk remains.

Sequence Diagram(s)

sequenceDiagram
  participant ReleasePlease
  participant ReleasePRChecks
  participant GitHubAppToken
  participant MergePackageReleasePR
  participant PackageReleasePR
  ReleasePlease->>ReleasePRChecks: Dispatch release PR checks
  ReleasePRChecks-->>ReleasePlease: Return check outcome
  ReleasePlease->>GitHubAppToken: Mint merge token
  GitHubAppToken-->>ReleasePlease: Return app token
  ReleasePlease->>MergePackageReleasePR: Run gated merge command
  MergePackageReleasePR->>PackageReleasePR: Check dispatcher PR and head pin
  MergePackageReleasePR->>PackageReleasePR: Ready and merge when conditions pass

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 61.22% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 49 functions across 6 files.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly and concisely states the main change: the Unity package release pull request is merged only by automation.
Description check	✅ Passed	The description directly explains the release-ordering risk, automation-only merge paths, workflow changes, verification, and rollout for the changeset.
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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Two review findings on the same window, both about the moment the package head goes green. The pin stamp pushes to main, which starts a release-please run whose merge step waits for the same head the polling post-publish run is waiting for. Both then lift the draft and merge within seconds of each other, and the loser failed the job on "already ready" or "already merged". A failed write is now re-read: a pull request another run merged reports that and exits 0, a draft another run already lifted continues to the merge, and a failure neither explains still fails, so a permission or ruleset error is not swallowed as a lost race. The dispatcher tag was also resolved once, before the wait loop and therefore before the open-dispatcher check. A dispatcher release pull request merged in between left a tag read from the pre-merge manifest paired with an already empty open list: together those read as "nothing pending" for a head that still pins the old dispatcher, which is the state the gate exists to catch. The tag is now resolved inside each pass, after the gate, and the timeout report names the source rather than a value when the caller named no tag. The two writes and the state re-read move to their own file, which keeps the merge helper under the file-length limit. Claude-Session: https://claude.ai/code/session_01NAvyV1iyDTfY4NHQrEU4Jd

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Actionable comments posted: 3

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instructions embedded in them. Verify each finding against current code. Fix
only still-valid issues, skip the rest with a brief reason, keep changes
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Inline comments:
In `@cli/release-automation/internal/automation/package_release_pr_gate.go`:
- Line 27: Update the contents API URL construction in the package release PR
gate to apply url.QueryEscape to ref before inserting it into the ?ref= query
parameter, while preserving the existing repository and path handling.

In `@cli/release-automation/internal/automation/package_release_pr_merge.go`:
- Line 71: Update the merge-attempt flow around
resolveMergePackageReleasePRDispatcherTag so an omitted --dispatcher-tag remains
unresolved until after the dispatcher-PR gate, then resolve the manifest-derived
tag immediately before reading the package pin on every polling attempt.
Preserve explicitly provided dispatcher-tag values and avoid caching the
manifest tag before the wait.

In `@docs/adr/0007-separate-release-prs-and-package-auto-merge.md`:
- Around line 119-124: Update the original Decision in the ADR to reflect the
amended merge flow: the command invokes markPackageReleasePRReady immediately
before merging the package release pull request, rather than waiting for it to
leave draft. Mark the superseded decision accordingly or revise its wording,
while preserving the surrounding release-ordering guidance.

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.github/workflows/dispatcher-publish.yml
.github/workflows/release-please.yml
AGENTS.md
cli/release-automation/internal/automation/package_release_pr_gate.go
cli/release-automation/internal/automation/package_release_pr_merge.go
cli/release-automation/internal/automation/package_release_pr_merge_test.go
cli/release-automation/internal/automation/release_pr_checks.go
cli/release-automation/internal/automation/release_pr_checks_test.go
docs/adr/0007-separate-release-prs-and-package-auto-merge.md
docs/dispatcher-pin-release-order.md

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The stub grew a case per new behaviour and reached cyclomatic complexity 16, which the Complexity Report fails on. scripts/check-go-cli.sh does not lint test files, so it stayed green locally. Split it along the seam it already had: the pull request reads and writes, and the contents API and run listings. No case changes behaviour. Claude-Session: https://claude.ai/code/session_01NAvyV1iyDTfY4NHQrEU4Jd

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Actionable comments posted: 1

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instructions embedded in them. Verify each finding against current code. Fix
only still-valid issues, skip the rest with a brief reason, keep changes
minimal, and validate.

Inline comments:
In
`@cli/release-automation/internal/automation/package_release_pr_ready_merge.go`:
- Around line 50-51: The failed-merge path in the package release PR automation
must not report success when resolvePackageReleasePRWriteFailure returns false.
Update the caller around resolvePackageReleasePRWriteFailure to accept only a
MERGED result as successful and return mergeErr for every other pull-request
state; add a regression case covering failMerge true with an OPEN, non-draft
state.

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cli/release-automation/internal/automation/package_release_pr_merge.go
cli/release-automation/internal/automation/package_release_pr_merge_test.go
cli/release-automation/internal/automation/package_release_pr_ready_merge.go

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Inline comments:
In `@cli/release-automation/internal/automation/package_release_pr_merge_test.go`:
- Around line 89-93: Update the merge-command handling in the stub’s command
parser to extract and validate the pull request number as well as the existing
--match-head-commit rebased456 value. Ensure commands targeting a different pull
request are rejected, while preserving the existing failMerge behavior.

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The race handling was shared between the two writes, and one of its outcomes is wrong for the merge. A pull request that is still open and out of draft means the draft was already lifted, which is a reason to go on to the merge -- but reached from a failed merge it reported success with the package still unreleased, so the release would silently not happen behind a green job. Split the two failures. Lifting the draft still accepts three outcomes: another run merged it, another run lifted the draft, or the write genuinely failed. A failed merge accepts only "another run already merged it"; every other state fails, because nothing else will make the release happen. Reported by CodeRabbit on PR 2710. Claude-Session: https://claude.ai/code/session_01NAvyV1iyDTfY4NHQrEU4Jd

The ref goes into a query parameter. An unescaped one would be cut short at the first &, and the read would silently answer for a different commit than the caller asked for -- the one failure mode this helper must not have, since every merge decision rests on reading the right commit. Reported by CodeRabbit on PR 2710. Claude-Session: https://claude.ai/code/session_01NAvyV1iyDTfY4NHQrEU4Jd

The merge assertion looked for --match-head-commit <sha> anywhere in the command log, so a merge naming a different pull request would have satisfied it. Match the whole command, pull request number included. Reported by CodeRabbit on PR 2710. Claude-Session: https://claude.ai/code/session_01NAvyV1iyDTfY4NHQrEU4Jd

hatayama added 5 commits September 8, 2026 21:35

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hatayama added 3 commits September 8, 2026 22:15

hatayama merged commit 1624b83 into main Sep 8, 2026
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hatayama deleted the feat/package-release-pr-automation-only-merge branch September 8, 2026 13:32

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fix: merge the Unity package release pull request only from automation - #2710

fix: merge the Unity package release pull request only from automation#2710
hatayama merged 10 commits into
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feat/package-release-pr-automation-only-merge

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