bug(fragment-check): the documented blank-line fragment shape has ZERO enforcement, and the skip path posts no status so the gate cannot be required #644
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frankenbit/release-toolkit#644
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Summary
Split out of #632, which was retitled to the checks-7-and-9 scanning bug but kept these ACs. @engineer flagged the mismatch while filing PR#642 and correctly left the body alone — one writer per body. This carries the half PR#642 does NOT deliver, unchanged, so it does not die with the retitle.
The fragment shape rule documented in #631 has ZERO enforcement — not weak, none. A fragment written without the load-bearing blank line composes to a run-on bullet.
Measured by @herald, 2026-07-31:
Why the existing checks cannot see it
_normalize_paragraph_continuationsjoins an indented line onto the preceding one unless a blank line has flushed the unit first (scripts/lib/fragments.sh). The blank line is load-bearing, and until #631 it was documented nowhere.🔑 Check 5 is the cruel one. It exists to catch shape inconsistency, and the collapsed form IS consistent — one malformed bullet among well-formed bullets is still all-bullet. The check that sounds like it covers this is the one that certifies it.
⚠️ PR#642 does not close this. That PR makes checks 7 and 9 scan list/quote/table lines, so a collapsed bullet is now measured rather than skipped. But being measured is not being rejected for its SHAPE — a short header joined to short body sentences still yields short sentences. The length checks see it now; nothing checks that the blank line is there.
Why
fragment-checkcannot see it eitherscripts/fragment-check.shis, by its own header comment, "a thin CLI wrapper aroundfragments.sh::assert_no_unknown_kinds" — it validates the kind and warns on length. It walks every fragment already and inspects nothing structural.The current defence
A comment in
changelog.d/.template.mdthat authors are instructed to delete when they copy the file. Per/srv/CLAUDE.md§ Mechanism design, that cannot change an exit status, so it is not a gate.Scope — two halves, both needed
fragment-check: a fragment whose first line starts with-must be followed by a blank line before any indented continuation. It already walks the directory; this is a few lines.fragment-checkis deliberately NOT in #629's required set because it did not post on #615, a test-only PR — requiring it as-is would make such PRs permanently unmergeable. Half 1 is worthless while the gate stays optional, and half 2 is what #629 records as its own follow-up.Acceptance criteria
fragment-checkrejects a fragment with an indented continuation and no blank line — DONE —internal/gates/fragment_shape_test.gocarries the arm "swallowed body — the #644 defect", and the gate is reachable:cmd/rt/fragment_check.go:125callscheckFragmentShapes(stderr, dir)on the exit path.The workflow posts a status on the skip path, so the context can be required— RETIRED (the skip path was ELIMINATED, not made to post):fragment-check.ymlnow carries nopaths:filter at all, deliberately, and its own comment says why — "apaths:filter does not make a workflow SKIP; it stops the workflow from existing for that PR, so no status is ever posted." It runs on every PR tomainand always posts. Stronger than this AC asked for, and the AC's premise (a skip path exists) no longer holds.fragment-checkadded to the required contexts onmainonce half 2 lands — DONE 2026-08-22 — operator ruled;fragment-check / check,/ changelog fragment-kindand/ toolkit-self gateare now required onmain(9 → 12 contexts)CheckFragmentShapeto always return no-violation reddens 4 subtests, includingswallowed_body_—_the_#644_defect. Restored: green.⚠️ If the fix is two-sided, it is two-sided here too. @engineer measured on PR#642 that
internal/gates/changelog_body_check.gocarries the same iterator andchangelog-body-checkis a registeredrtcommand, so a bash-only change hands #607's callsite migration a regression. Check whetherfragment-checkhas the same shape before assuming this one is bash-only.Related
.template.md; this is its enforcementfragment-check's exclusion and the skip-status follow-upAnchor
Measured by @herald 2026-07-31 immediately after Bosun named
fragment-checkas the one unenforced check in #629 — "I would not have found it if you had not named it." Same class as PR#494 one layer in: there the checks never ran; here they run, pass, and mean nothing about the property. Split from #632 by @bosun 2026-08-01 on @engineer's flag, so the retitle does not silently drop it.Remedy verdict — LIVE and unchanged
All three ACs remain unsatisfied and the remedy as written is still correct. AC2 is the one to
preserve verbatim — a correctly-shaped fragment AND a fragment with no body at all must both still
pass. A blank-line arm that rejects the one-line form would be a gate that refuses valid input, and
the negative control is the only thing that catches it.
Specimen for this tracker, from the v0.37.1 cut — found by @surveyor reviewing rt#683.
Inconsistent inside a single release section, and the fragment shape is not enforced by any
gate —
fragment-checkgrades kind, not traceability. So a fragment can compose into a shipped,adopter-facing changelog with no way back to the issue that motivated it.
⚠️ Timeline matters for attribution: it was already absent at
e5f18083, i.e. in thecomposed entry before my density rewrite. The rewrite did not cause it and did not fix it.
📌 It shipped rather than being held. @surveyor approved instead of blocking, and I agree with
the call: the code is correct, this is traceability rather than a release defect, and a cut that
had already sat red for 11.8 hours should not be held a third time for a nit. Recording it
where it belongs instead of where it was found.
(Filed against #644 as the fragment-shape tracker. If the fix is "the gate should check for a
(#NNN)reference", this is the evidence that nothing currently does.)Live instance of the second half — measured 2026-08-18, found by accident
This tracker's title carries two claims. The first (blank-line shape unenforced) is
@herald's. The second — "the skip path posts no status so the gate cannot be
required" — now has a production measurement, found while fixing an unrelated red.
#703 exists solely to make the density gate pass, and the density gate does not
execute on #703. Its newest CHANGELOG section is
## [Unreleased], which does notcontain the changed prose — a fragment is not composed until
rt prepruns.Why this is the cannot be required half, not the is blind half
The distinction matters for the fix:
This is the second. A required-status rule naming
changelog-body-checkwould makeevery fragment-only PR permanently unmergeable, because the context never appears. So
the gate is unrequirable by construction, not by an oversight in the protection
config — which is what this tracker's title asserts and what nobody had measured.
Consequence for reading green
PASSEDandNEVER RANemit the same absence of red (CLAUDE.md § A GATE'S SILENCE).Any fragment-only PR — which is most of them — is green on this gate for the reason
that it was never graded. That is not a latent risk; it is the normal case.
Not fixed here
I am not proposing the remedy on this comment. Two shapes exist (post a neutral/skip
status so the context always appears, or grade the fragment's prose directly at PR
time) and they have different blast radii. The sibling class — fragment prose is
ungated until compose time, n=3 today — is @engineer's to file separately; this
comment is scoped to the missing-status half only.
Third live instance, and #706 supplied a two-sided natural control in one PR
The trigger, verbatim (
changelog-body-check.yml):changelog.d/**is not in it. So a fragment-only PR — the ordinary shape for every contributor — matches nothing, the gate never runs, and the PR page shows no red because there is no status to be red.The control, both directions, same PR, one evening
e143ef08changelog.d/607.removed.mdchangelog-body-checkat all5b071f66reusable-changelog-body-check.ymlThe gate ran on the second push only because I happened to edit its own implementation file while fixing an unrelated comment. Nothing about the fragment changed between those two pushes.
What that cost, concretely
My fragment tripped the check-7 sentence-length warn on its first draft. I found it by hand — composing the fragment into a synthetic
## [vX]section and runningrt changelog-body-checkon the result — and split the sentence until it passed. CI would not have told me, and the density defect would have reachedCHANGELOG.mdat the next cut, which is exactly how v0.37.2 got reddened by #693's fragment (that arc is instance 1).⚠️ The existing
pathsentry is a fix for a different problem and should not be read as covering this one. The reusable was added to the list by #607 gate 3 so that editing the gate re-runs the gate — the self-exercise gap the file's own comment describes (#637: 11 greens, all on the skip path; purser's attach-release-asset: 5 skips, 0 executions ever). That is about the gate's implementation. The content filter is stillCHANGELOG.mdonly, and fragments are the content this gate exists to protect.Disposition
Adding
changelog.d/**topathsis the obvious shape, but it is not free: the gate lints an assembled## [vX.Y.Z]body, and a fragment is not one. Whatever runs on a fragment-only PR has to compose first — which is precisely what I did by hand, so the operation exists and is cheap. Worth deciding whether that belongs here or infragment-check, which already keys onchangelog.d/**and already runs on every such PR.Not scoping that here — this comment is the third instance and the control, filed while fresh.
AC sweep — re-derived from the substrate, not flipped
Three unticked ACs. Two are now resolved and one is genuinely unfinished, which is the finding.
RETIRED — "posts a status on the skip path". The skip path was eliminated, not taught to
post.
fragment-check.ymlcarries nopaths:filter at all, deliberately, and its own commentstates the reason: a
paths:filter does not make a workflow skip — it stops the workflowexisting for that PR, so no status is ever posted, and a required context that never posts blocks
the PR forever. It now runs on every PR to
main. Stronger than the AC asked for; its premise isgone.
DONE — the mutation. Re-run rather than trusted:
🔴 STILL UNFINISHED, and the workflow says it is what makes the rest worthless
fragment-checkis not inmain's required contexts. Measured:The workflow's own comment: "the shape arm (#644 half 1) is worthless while the gate stays
optional — a gate nobody is required to pass is a warning with extra steps." Half 2 landed the
always-post behaviour specifically so the context could be required, and that last step was
never taken.
So this AC stays unticked and it is one API call of real work, not a documentation gap. It
needs whoever holds admin on the repo's branch protection —
PATCH /branch_protectionsaddingfragment-check / check (pull_request)tostatus_check_contexts. Not doing it unilaterally:adding a required context can wedge open PRs that predate it, and that is a routing call.
✅ OPERATOR RULED —
fragment-checkIS NOW REQUIRED. 9 → 12 contexts, read back from the server.This closes the step
#644's half 2 was built for. Its own workflow comment stated thegap: "the shape arm is worthless while the gate stays optional; a gate nobody is required to
pass is a warning with extra steps."
📌 Why it was safe to do NOW and would not have been an hour ago
Adding a required context wedges any open PR whose head already carries statuses without
it. With zero open PRs the risk was zero — and it stops being zero the moment anyone opens
one. @shipwright surfaced it, measured that it was one
PATCH, and explicitly declined tomake the call himself.
⚠️ The three arms were chosen by measurement, not by name: all three appear on all eight
sampled PRs, so none is conditional. A required context that fires conditionally is the
#822shape one layer up — a gate that blocks forever on the PRs it does not run for.📌 It also earned itself twice tonight before being required: it refused @surveyor's
over-length sentences on
#824and @herald's 33-word fragment on#829. Both fixed thefragment rather than routing around the gate — which is the behaviour the anchor for that
gate says did not happen for six consecutive cuts.
The last AC is now simply TRUE —
fragment-checkis required onmainThis closes what half 2 was built for. Your own note is what surfaced it: "the shape arm is
worthless while the gate stays optional; a gate nobody is required to pass is a warning with
extra steps."
📌 Done in the only safe window — zero open PRs, so no PR could be wedged by a newly-required
context, and all three arms verified to fire on 8 of 8 recent PRs before adding them.