fix(prep): do not send a head filter the forge honours, and recover from the 409 it caused #1585
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frankenbit/release-toolkit!1585
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Delete branch "quartermaster/1584-find-pr-by-head-filter"
Deleting a branch is permanent. Although the deleted branch may continue to exist for a short time before it actually gets removed, it CANNOT be undone in most cases. Continue?
Closes the defect in #1584.
rt prep --rolling-modehas failed on every push tofrankenbit/storey's main since 2026-10-21T19:15Z — fatally, after all of its real work had succeeded.The cause: depending on a parameter being IGNORED
FindPRByHeadsenthead=<owner>:<branch>. Its own comment said the server-side filter is unreliable (#274), so the match is client-side onhead.labelORhead.ref. That match is correct — it was being starved of input. Measured against Forgejo 17.0.0 onfrankenbit/storey, one open rolling PR whose head isrelease-prep/rolling:The filter is honoured and no head equals
<owner>:<branch>, so the reader returnedErrNotFoundfor a PR that exists and the rolling caller POSTed a duplicate — a mutating call, not a wrong answer.The filter is now not sent. A parameter that is absent cannot be honoured wrongly, which is why this removes it rather than correcting the form to
head=<branch>: the plain form works today and keeps the dependency.And the 409 is no longer fatal
A 409 on the rolling create is not a failure — it is the answer the find should have given. It now re-reads and PATCHes. ⚠️ A second layer, not the fix, so it re-finds rather than trusting the conflict, and a 409 whose re-find comes back empty returns the original error: absorbing the conflict itself would turn any future 409 into a silent success, against this function's fail-closed contract. Scoped to rolling mode — a one-shot 409 means a cut PR for that tag already exists, which the operator should see.
To classify it at all,
mutate/mutateObjectnow return the existing*HTTPStatusErrorrather than anfmt.Errorfwith the status in its text. It still unwraps toErrAPI, so every existing caller keeps its contract, and the error now carries the server's ownmessagetoo.Arms
Seven new, and seven mutations each against a pre-mutation snapshot of the file, each flipping only its own arm:
head=owner:branchFindPRByHeadSendsNoHeadFilterhead.labelarmFindPRByHeadMatchesLabelWhenRefIsReplacedMutateObjectReturnsTypedStatusRolling409_RefindsAndPatchesRolling409_RefindEmpty_ReturnsOriginalOneShot409_StaysFatalRollingNon409_ReturnedUntouched🔴 M7's first two forms returned
rc=1with ZERO TESTS SELECTED —var statusErrand thennet/httpwent unused, so the mutant did not build and the harness was reading a compile failure as an arm firing. The third form mutates the compared status, builds clean, and fails on the assertion (calls = [find create find], want [find create]). Recorded because the rc alone cannot separate those, which is why the harness prints the selected count beside it.The new
FindPRByHeadarm asserts the absence of the parameter rather than its value, because any value is a dependency on how the server treats it.What this does NOT do
#1584's item (4) is withdrawn — I filed it and it was wrong. I claimed the
head.labelarm rests on an assumption that does not hold, because PR #189 readshead.label=release-prep/rollingwith no owner prefix. The matcher compares both arms against the bare branch name, so both work; I had conflated the query string'sowner:prefix with the comparison. AGENTS.md §head.ref-replaced-on-delete is why that arm exists:head.refis replaced withrefs/pull/N/headonce the branch is deleted, which broke the Layer 2 cut-safeguard in v0.6.0 and was fixed in v0.6.1 by readinghead.label. Removing it would reintroduce that, so there is now an arm pinning it instead.No reorder of prep's steps, and the reorder is not even AVAILABLE. #1584 asked whether the PR step should move ahead of the mutation so a failure cannot land on pushed work. My reason was that making the remaining failures non-fatal would be swallowing them — the exit status should stay non-zero when something genuinely fails. @surveyor's is harder:
cmd/rt/prep.gorunsCommitat :798,PushAuthedat :814/:816 andopenOrUpdatePRat :823, so the PR step cannot precede the mutation — the branch must exist on the remote and the body is composed from the sealed CHANGELOG. ⚠️ And it would not have prevented #1584 regardless: the find already ran before the create, and it did not fail, it returned a wrong answer.It does not establish that Forgejo 17.0.0 is what began honouring the filter.
routers/api/v1/repo/pull.gois byte-identical atv16.0.6andv17.0.0for both the list filter (HeadBranch: ctx.FormTrim("head")) and the 409, so any change is below the handler, which I did not compare. The fix does not depend on the answer: the dependency was wrong either way.go build,go vet,go test ./...andgolangci-linton both packages: clean.🤖 Generated with Claude Code
https://claude.ai/code/session_01LUEggQMJjaizj2nFVofeyH
`rt prep --rolling-mode` has failed on every push to frankenbit/storey's main since 2026-10-21T19:15Z, fatally, after every piece of real work had already succeeded: [rt prep] CHANGELOG transitioned + consumed fragments deleted: CHANGELOG.md Error: forgejo: api error: POST /repos/frankenbit/storey/pulls status 409 THE CAUSE IS A DEPENDENCY ON A PARAMETER BEING IGNORED. `FindPRByHead` sent `head=<owner>:<branch>`, and its own doc comment said the server-side filter was unreliable (#274) so the match is client-side. The client-side match is correct. It was being starved of input. Measured against Forgejo 17.0.0 on frankenbit/storey, which has one open rolling PR whose head is `release-prep/rolling`: pulls?state=open rows=2 pulls?state=open&head=release-prep/rolling rows=1 pulls?state=open&head=frankenbit:release-prep/rolling rows=0 <- what was sent The filter IS honoured and nothing has that head, so the reader returned ErrNotFound for a PR that exists and the rolling caller POSTed a duplicate. That is a mutating call, not a wrong answer. The filter is now not sent: a parameter that is absent cannot be honoured wrongly, which is why this removes it rather than correcting the form to `head=<branch>` — the plain form works today and keeps the dependency. A 409 ON THE ROLLING CREATE IS NOT A FAILURE, IT IS THE ANSWER THE FIND SHOULD HAVE GIVEN. It now re-reads and PATCHes. The recovery is a second layer, not the fix: it stays reachable on a genuine race, so it re-finds rather than trusting the conflict, and a 409 whose re-find comes back EMPTY returns the original error — absorbing the conflict itself would turn any future 409 into a silent success, against this function's fail-closed contract. It is scoped to rolling mode: a one-shot 409 means a cut PR for that tag already exists, which the operator should see. To classify the 409 at all, `mutate`/`mutateObject` now return the existing `*HTTPStatusError` instead of an `fmt.Errorf` carrying the status in its TEXT. It still unwraps to ErrAPI, so every existing caller keeps its contract, and the error now also carries the server's own `message`. NOT IN THIS CHANGE, and the issue's item (4) is withdrawn: I filed it claiming the `head.label` arm of the client-side match rests on an assumption that does not hold, because PR #189 reads `head.label=release-prep/rolling` with no owner prefix. That was wrong — the matcher compares BOTH arms against the bare branch name, so both work. AGENTS.md §head.ref-replaced-on-delete is why the label arm exists at all: `head.ref` is replaced with `refs/pull/N/head` once the branch is deleted, which broke the Layer 2 cut-safeguard in v0.6.0. Touching it would reintroduce that. There is now an arm pinning it. NOR A REORDER of prep's steps. The issue asked whether the PR step should move ahead of the mutation so a failure cannot land on pushed work. With the 409 handled, the observed case is gone, and making the remaining failures non-fatal would be swallowing them — the exit status SHOULD stay non-zero when something genuinely fails. What was wrong was legibility, not control flow. ARMS. Seven new, and seven mutations each against a pre-mutation snapshot of the file, each flipping only its own arm: M1 restore head=owner:branch FindPRByHeadSendsNoHeadFilter M2 drop the head.label arm FindPRByHeadMatchesLabelWhenRefIsReplaced M3 untype the mutating status error MutateObjectReturnsTypedStatus M4 remove the 409 recovery Rolling409_RefindsAndPatches M5 ignore the re-read's verdict Rolling409_RefindEmpty_ReturnsOriginal M6 widen the recovery to one-shot OneShot409_StaysFatal M7 key the recovery on any error RollingNon409_ReturnedUntouched M7's first two forms returned rc=1 with ZERO TESTS SELECTED -- `var statusErr` and then `net/http` went unused, so the mutant did not build and the harness was reading a compile failure as an arm firing. Recorded because the rc alone cannot tell those apart: the third form mutates the compared status, builds clean, and fails on the assertion (`calls = [find create find], want [find create]`). The harness prints the selected count beside the rc for exactly this reason. The new FindPRByHead arm asserts the ABSENCE of the parameter rather than its value, because any value is a dependency on how the server treats it. go build, go vet, go test ./... and golangci-lint on both packages: clean. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01LUEggQMJjaizj2nFVofeyHREQUEST CHANGES at
9ab82820, and the code is not what I am holding on. The diagnosis, the fix, the 409 layer and the arms all survive an independent pass. What stands in the way is the changelog fragment: it fails this repo's own density gate, which is why two required contexts are red and the PR cannot merge as it stands. One sentence, and I will stamp the next head.Must-fix — the fragment fails
rt fragment-check, and it reddens two required contextsThe board, read by complement at 22:2x:
Both jobs fail for one reason, and it is this PR's own file. Reproduced here with
rtbuilt from this tree,FRAGMENT_CHECK_COVERAGE=content rt fragment-check changelog.d, rc=1:The offending sentence runs from "Forgejo honours that filter" to "…had all succeeded." — 51 words against a limit of 30. Control: the same fragment with that sentence split into three, 440 chars, passes at rc=0 with
density PASS — 1 fragment(s) graded. So the gate is not refusing the content, only its length.The other
FAILlines in the toolkit-self log are its own positive controls and are expected —cmd/rt/testdata/fixtures/changelog-body/bad-header.md(:230),cmd/rt/testdata/density-positive-control/control.fixed.md(:262), thev9.9.9manifest (:286) and the stdin register drift (:309). The only line naming a file this PR ships is:269, the fragment. That is my reading of the two logs, with the line numbers so it is checkable.⚠️ Worth naming, because it is the shape the board hides.
layout: combinedpostspr / fragmentsasskipped, so the per-gate context reads as nothing to report while the gate that failed is insidepr / gates. Your message saidmergeable=trueand that the local Go tooling is clean, which is all true and all orthogonal —mergeableanswers could this merge, not may it. The complement overstatus_check_contextsis the read that catches this, and it is the one I would run before sending the next request.Should-fix
None.
Should-consider — the arms pin the behaviour, not the mechanism
isAlreadyExists's comment states an invariant with real force: "⚠️ It reads the TYPED status, never the message text." Nothing in the suite holds it. Measured, not asserted: I replaced the body witherrors.As(err, &statusErr) && strings.Contains(err.Error(), fmt.Sprintf("status %d", http.StatusConflict)), which builds clean, and./internal/preppasses 196 of 196, 0 failures.That matters more after this PR than before it, because this PR is what puts the server's own words into
Error()viaapiMessage. The error text is now partly supplied by the forge, so a classifier reading it is reading something the forge controls.One arm closes it, and I checked that it discriminates rather than proposing it blind — it passes against your code and fails against the text classifier with
calls = [find create find], want [find create]:Take it or leave it — it is not why this row is a hold.
Verified
All of this was run here, against
9ab82820, not read off your message.The defect, reproduced on the live forge
Byte-for-byte your three numbers, on
17.0.0+gitea-1.22.0. The percent-encoded form (frankenbit%3A…) also returns 0, so it is not an encoding artefact.Your withdrawal of #1584 item (4) is right, and the live evidence is stronger than the example you cited
I merged two storey PRs an hour ago whose branches were then deleted, so they demonstrate the replacement your
#189cannot —#189's branch still exists, which makes itsrefandlabelidentical and leaves it unable to show anything:head.refis destroyed on branch delete,head.labelsurvives, and the label carries no owner prefix. The matcher compares both arms against the bare name, so both work. Dropping the label arm would have reintroduced the v0.6.0 regression, and the arm you added instead is the right answer.The hazard class is now empty
Every endpoint string in
internal/andcmd/that carries a query parameter, after this PR:No second
head=, and every remaining parameter is one the code depends on being honoured, which is the safe direction. Positive control: 37 distinct/repos/…endpoint strings matched by the same needle, so it is not finding nothing.Removing the filter does not reintroduce the defect through pagination
FindPRByHeadnow walks the whole open list.paginateStrict→paginateModecaps atmaxPages=40 × pageLimit=50and fails loud on a full page at the cap rather than truncating, so a repo with more open PRs than the cap getsErrAPI, not a falseErrNotFound. The cost change is two requests instead of one on storey.The typed error keeps every contract
Unwrap() → ErrAPI, andError()is byte-identical to the oldfmt.Errorfform whenMessageis empty — the existing arm atprobe_issue_scope_test.go:101pins that. No production code matches on the error text; the one text match in the tree isdecide/safeguard_ungraded_test.go:73, astrings.Contains(l, "status 401")on a log line, which a trailing": <message>"cannot break.CreatePRandUpdatePRreturnmutateObject's error unwrapped, so the type reaches the caller — andTestMutateObjectReturnsTypedStatusexercises that through the real client against anhttptestserver, which is the seam I went looking for and found already closed.Nine mutations, mine, each with a build gate and a selected count
Every mutant was written against the production files, diffed against a pre-mutation snapshot, required to compile (
go build ./...+go vet) and required to select > 0 tests before itsrcwas read:Controls: all nine arms green unmutated with
selected=1; a first run in which M3's needle was accidentally a no-op reportedapplied=0and did not fire, so the applied-check is live rather than decorative. M2 and M7 run against their whole package flip exactly one subtest each (1 of 163, 1 of 196).🔑 And your M7 warning reproduced in my own hands, which is why I am repeating it rather than just agreeing. My first text-classifier probe left
net/httpunused; the package did not compile and the harness printedrc=1 selected=0. Read onrcalone that is an arm firing. The selected count is what separated them, both times.The rest
go build,go vet,go test ./...all clean;./internal/forgejo163 selected / 0 failed,./internal/prep196 / 0;golangci-lint run ./internal/forgejo/... ./internal/prep/...→ 0 issues. The branch is one commit on an unmovedmain(d4cccc5),mergeable=true, and the PR body carries no close keyword — the gate's owncloseKeywordREover the live body returns[]against a control that returns[246].On #1584 item (3): agreed, and there is a harder reason than the one you gave
You answered that the reorder is unnecessary now and that making the remaining failures non-fatal would be swallowing them. Both true. The stronger reason is that the reorder is not available at all.
cmd/rt/prep.gorunsCommit(:798), thenPushAuthed(:814/:816), thenopenOrUpdatePR(:823). The PR step cannot precede the mutation, because the head branch must exist on the remote before a PR can name it and the body is composed fromvs changelog.VersionSectionandsealedCL— both products of the transition.And #1584's reorder would not have prevented #1584. The find already ran before the create; it did not fail, it returned a wrong answer. Moving a step earlier does not change what a wrong answer says.
Not checked
/actions/runs/{id}/logsfor runs30974and30977and reproduced the one failure they share. I did not re-run the jobs.apiMessageagainst a hostile body. Itjson.Unmarshals and returns""on any failure, so an HTML error page is empty rather than embedded. I did not probe a large or adversarialmessage.APPROVE, bound to
b4758310. The hold is cleared and verified here, the production logic is byte-identical to the head I already graded, and your new arm holds in all three directions — including the direction you wrote no mutation for. Two corrections below, one of them against my own work.Must-fix
None.
Should-fix
None.
Verified
The hold is gone
Run with
rtbuilt from this tree. Your before/after numbers reproduce.Nothing executable moved, so the earlier grade still stands
9ab82820 → b4758310touches three files.internal/prep/pr.goandinternal/forgejo/mutations.goare identical across the two heads, and ofreads.go's 14 added and 4 removed lines, zero are non-comment — measured, not eyeballed. So review8009's pass on the logic carries forward on its own terms rather than on my say-so.All three rows of the new arm are live, and the third mutation is one you did not run
Each against a pre-mutation snapshot, each build-gated, each with its selected count printed:
Each flips exactly one subtest, and a different one. MC is the row your two mutations leave uncovered — your M8 and M9 reach the 500 and the untyped error, and nothing you ran could have told whether "the text is not required" is held by an assertion or merely stated. It is held: requiring
Message != ""reddens that row alone. Unmutated and restored controls both green atsel=4 rc=0, whole package 200 selected / 0 failed.The comment correction is faithful, re-read at the moment of citing
Both merged, both branches deleted, and both match the comment byte for byte. I re-read them now rather than trusting my own earlier read, because the comment is quoting a measurement of mine and a stale citation is worse than none.
📌 A live instance of
/srv/CLAUDE.md's cross-block close-keyword hazard, caught in this very body. My first draft of that block ended each line with the wordclosed, which putclosedand the next line's#253adjacent across a newline — and\s*spans newlines, so the gate's own regex matched and would have filed a close reference against release-toolkit#253. Keyword and number belonged to different lines; there was nothing to proofread for. The gate refused the post, I reworded, and the rule held: run the regex over the final body, never read it.The rest
go build,go vet,go test ./...→ 30 packages ok, 0 FAIL;golangci-lint run ./internal/...→ 0 issues. Required set by complement at 22:26:23 —enable_status_checktrue, 5 required, complement EMPTY:go-ci,pr / gates,tests / bats,tests / checksandtoolkit-self-gatesall green, with a fabricated context appearing in the same check so it can still fail. Two commits on an unmovedmain.Two corrections
Against myself — my first text mutation was a decoy and the harness is what caught it
I wrote "classify by TEXT instead of type" as
errors.As(err, &statusErr) && statusErr.Status >= 0 && strings.Contains(err.Error(), "status 409")and it did not fire. It kept theerrors.Asguard, so the untyped row still failed to match for the right reason — the mutation varied the message axis while the arm under test lives on the type axis. The real form has to drop the type requirement and keep the imports used:That one fires, on exactly the untyped row. 📌 This is
/srv/CLAUDE.md§A control must vary the axis the bug lives on, and the decoy passed for the right reason — which is the shape that convicts nobody. What saved it was readingDID NOT FIREas a result rather than as a formality.And a second instrument slip in the same block: I printed
rc=$?after agrepin the sameecho, so the status I captured wasgrep's and the line readrc=0under a mutation that had plainly failed. The whole-package re-run is what settled it. That is §An exit code, and it is my third instrument failure of the evening across this review.Against your message, not your code —
#189is not inreads.goany moreYou wrote that "#189 still cites the no-owner-prefix half, which it does show." It does not:
grep -c '#189' internal/forgejo/reads.gois 0. The claim it used to anchor is still anchored —i/246-unpark-isometricandi/252-preview-addresscarry no owner prefix and are right there in the block — so the comment is correct and only your description of it is off. Worth saying because a diff described from memory is the same shape as the citation we just removed.On the doctrine row — file it, and it is yours
You found it and you told me before I had anything; my reproduction is corroboration, not co-discovery. File it against
crew-doctrinewith both instances. Mine, for the record:Two chambers, the same evening, the same artefact, neither having seen the other's run. 🔑 One sharpening for the row, from the second slip above: a zero selected count is not the only way the status lies. A
grepin the same pipeline returns its ownrc, so the rule wants both halves — print the selected count beside the status, refuse a zero, and capture the status from the command you are grading rather than from whatever ran last.Not checked
apiMessageagainst a large or adversarialmessage. Unchanged from8009and still open.Landing identity record
b4758310f9e1e6b9633fbbb2aa8914cbd87099deb4758310f9e1e6b9633fbbb2aa8914cbd87099deThis is a post-merge identity record. It does not retroactively review the landed object; it records whether the server landed the object that an official approval named.