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timothy 20b7171fba fix(672): review round 2 -- correct a stale rule: field, document the self-test gap
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Re-review of the fix commits returned MERGEABLE (nine trigger mutations all
caught, every prior finding verified against independent sources) with four
low-severity findings. All four are addressed here.

F1: `release.verdict-status-check`'s `rule:` frontmatter still said "A
`pull_request` workflow auto-passes the two exempt classes". Round 1 past-tensed
that record's BODY and left its `rule:` stale -- which is the exact failure mode
the previous commit cites as the reason to put limitations in `rule:` in the
first place. The catalog row mirrors this field verbatim and it mirrors again
per-`key:` into MemPalace, so a stale `rule:` propagates further than a stale
paragraph.

F2: same record, "is what makes the rollout self-hosting" -> past tense. It
described #630 and now reads as a live property.

F3, the one that matters operationally: base resolution cuts BOTH ways. A change
to `review-verdict.yml` is no longer exercised by its own PR -- the PR runs the
version already on `main` -- so an edit goes live only ON MERGE, repo-wide,
having never run. A broken edit merges green and then breaks the gate for every
subsequent PR, and the PR that would repair it is gated by the same broken
workflow. The recipe for verifying one safely (scratch base + throwaway PR +
probe-named context) now lives in docs/ci-cd.md, which is where an operator
looks, rather than in the record.

F4: the sibling-workflow guard globbed `*.yml`, so a workflow added as `.yaml`
would be silently unscanned. Latent today, which is when it is cheap.

The record lost its meta-justification paragraph to the 60-line prose ceiling.
Fifth trim this session; the operational recipe moving to ci-cd.md is better
placement anyway, but it was forced rather than chosen. ersatztv#688.

Refs: #672
Decisions-Edit: yes
2026-07-28 23:03:15 +02:00
timothy 35a8ea8aef fix(672): review round 1 -- pin the trigger set exactly, sweep the stale claims
Cold review found the first cut of the test satisfiable by a still-vulnerable
config, and two prose claims that outran the evidence.

The test asserted "pull_request_target present, pull_request absent". Adding
`workflow_dispatch:` or `push:` ALONGSIDE it kept that green, and both are
ref-resolved with secrets, so either one restores an equivalent
self-supplied-definition path. Enumerating those two would have the same hole one
trigger later, so the assertion now pins the whole set: exactly
{pull_request_target}, nothing else. Verified by mutation -- adding
`workflow_dispatch` now reds.

Adds the guard that would have caught the residual below rather than only the
instance: no workflow OTHER than review-verdict.yml may reference
`review-verdict/h10` in executable lines. Scoped honestly in its docstring as a
drift guard, not a security boundary -- a workflow can still write the status
through an indirection a text scan cannot see.

`release.verdict-status-check` item 4 still asserted, in the present tense, that
a PR editing review-verdict.yml is judged by its own edited copy. That is now
false for this workflow, and it is the record a reader resolving the gate from
the catalog actually lands on. Past-tensed, with the surviving residual named.

The probe count said three. There were four; the omitted one is the only one with
a negative result, which is what turns an honest partial into an overclaim.
Corrected in both the record and ci-cd.md, along with what was NOT measured
(`reopened`/`ready_for_review` firing under the new trigger).

Also records two operational consequences a maintainer will otherwise hit cold:
retargeting a PR onto `main` leaves it statusless until its next push (`edited`
is not in `types:`), and the required contexts carry a literal `(pull_request)`
suffix, so repeating this fix on docker-build.yml would rename them and deadlock
merges unless branch protection is edited in the same operation.

Trimmed the record back under the 60-line prose ceiling -- for the second time
this session, which is ersatztv#688 reproducing, not a defect here.

Refs: #672
Refs: #697
Decisions-Edit: yes
2026-07-28 21:49:22 +02:00
timothy d51255a8ef fix(632): "could not check" is a third outcome, not a quiet synonym for "nothing to check"
Cold review's substantive finding. The first draft collapsed an unreadable status
response into the graceful-adoption path: `vdesc` came back empty, so `recorded_base` was
empty, so the comparison was skipped IN SILENCE — and a later, successful status read
could then auto-grant, emitting "merge gate: satisfied" for a comparison that never
happened. A transient Gitea hiccup is not evidence that the base is unchanged.

The unreadable status response and a PR with no resolvable `.base.ref` now both fall
through to a human `ask`, leaving exactly one benign silent case: a verdict that predates
#632 and could not have carried the field. The emptiness check is done in SHELL before jq
sees it, same jq-1.6 rule as the rest of this file.

Also from review: the graceful-adoption test asserted only that the decision lacked the
issue tag, so it would have passed for a base-specific ask or deny whose wording omitted
it — the failure mode most likely to appear when someone edits these messages. It now
asserts on the word "base".

Recorded rather than fixed, because fixing it would be worse: docs-only PRs exit before
this check, since that carve-out short-circuits the gate earlier. It does not auto-grant
— it passes through to an ordinary permission prompt — so the exposure is a missing
warning on a merge a human is already confirming, not a silent merge. The record now says
so instead of implying the deny is unconditional.

Mutation-verified: collapsing the unreadable case back into graceful adoption, skipping
the check on a missing live base, and dropping the mismatch deny each redden their own
test and nothing else.

Refs #632
2026-07-26 23:27:22 +02:00
timothy 00e623c066 fix(632): bind a review verdict to its BASE branch, not only to its head sha
#622 made `review-verdict/h10` a per-sha required status, so a new commit cannot
inherit an old verdict — the required context is simply absent on the new head.
Retargeting a PR's base reaches the same end from the opposite direction: the head sha
and the status both hold still while the merge-base, and therefore the effective diff
the verdict was formed against, changes underneath them. #622's record claimed the
invariant holds "by construction"; this was the documented exception, and an unrecorded
exception is how a guarantee degrades into a habit.

`post-review-verdict.sh` now records the base branch in the status description as a
trailing `(base: <ref>)`, and refuses to write a status at all if the base moved between
reading the PR and posting — the same TOCTOU window the head check already covers, which
the head check cannot see because retargeting does not move the head.
`pretooluse-merge-consent.sh` reads the field back and denies when it no longer matches
the PR's live `base.ref`.

Two choices are load-bearing, and each is pinned by a test rather than left to a comment:

- The comparator is `base.ref`, NOT `base.sha`. `base.sha` tracks the base branch's tip,
  which moves whenever anything merges to `main` — comparing it would invalidate every
  open verdict on every unrelated merge, converting a rare-event guard into a permanent
  merge deadlock. A base that merely advances is out of scope by design: rebasing onto
  it moves the head sha, which the per-sha binding already covers.
- The field goes in the status DESCRIPTION, not the verdict comment. The comment body is
  parsed by `scripts/check-review-verdict.sh`, whose grammar had three false-opens in its
  history (#629); nothing parses the description, so this adds a field without reopening
  that surface.

Scope is stated honestly rather than overclaimed: this is DETECTION on the hook path
only. A commit status carries no base of its own, so the server-side required check
cannot see a retarget, and a merge driven through the Gitea UI or API is unaffected. That
is the accepted exposure — base changes are rare, manual, and this is a two-account repo
— but it now fails loud in the one place that evaluates consent, instead of living only
in a doc.

Verdicts posted before this change carry no `(base: …)` and get NO opinion rather than a
deny; denying would block every in-flight PR the day it lands, and the window closes on
its own since verdicts are per-head and short-lived.

Verified by mutation, six mutants, each killed by its intended test: remove the hook's
deny; compare base.sha instead of base.ref; drop graceful adoption; stop recording the
base; drop the TOCTOU guard; accept a PR with no resolvable base. The positive controls
matter more than usual here — the test PR is deliberately non-docs (a docs-only PR
short-circuits the whole gate and would never reach the base check) and the rest of the
gate is unstubbed, so "the hook denied" alone proves nothing.

Refs #632

Decisions-Edit: yes
2026-07-26 23:13:50 +02:00
timothyandClaude Opus 5 50bcd7b0c7 fix(629): strip raw HTML blocks, and state where the hardening stops
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review-verdict/h10 Review-verdict: MERGEABLE @ 50bcd7b
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Round 5: raw HTML is the third code-block form. `<pre>`, `<code>` and HTML comments all render their
contents literally, so a verdict inside one is an example, not an approval:

  <pre> / <code> / <!-- ... -->  containing a verdict  ->  positive

Now stripped, tracked as a marker count rather than parsed — the direction of error is to strip MORE,
which can only ever withhold approval. Mutation-verified: removing the stripper fails all five cases.

AND THE HARDENING STOPS HERE, deliberately. The record now says so, because otherwise the next
session re-derives it: this is a best-effort heuristic, not a markdown parser. It covers the three
code-block forms markdown has (fenced; indented, via the column-0 rule; raw HTML) and is not proof
against every way to render text as non-prose.

Stopping is safe because the comment is NOT the load-bearing gate. Since #622 the authoritative
signal is the `review-verdict/h10` commit status, written only by post-review-verdict.sh from
explicit arguments — a comment cannot forge it. This classifier is condition (c) of the PreToolUse
hook: defense in depth on an agent's merge call. A residual false-open means the hook does not
object; it does not mean a merge happens.

Five rounds found five code-block forms, four of them introduced while fixing the previous round.
The generalisable rule, now in the record: when a heuristic keeps failing at the edges, check whether
it is actually the thing enforcing the invariant before spending another round on it.

Also measured, against the real corpus: a "verdict must be the first line" rule would have killed
every code-block form at once, but 14 of 18 verdict markers ever posted in this repo are NOT on the
first line — so it was rejected as a retroactive break, not deferred.

178 tests. refs #629

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

Decisions-Edit: yes
2026-07-26 01:14:59 +02:00
timothyandClaude Opus 5 28a9d0dbfd fix(629): round-4 — require the marker at COLUMN 0, narrowing the grammar instead of patching again
review-verdict/h10 Awaiting review verdict for 28a9d0d
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Round 4 found the last false-open: markdown has a SECOND code-block form the fence stripper does
not cover — indented blocks (4 spaces or a tab). A pasted indented example still self-approved:

    Example:

        Review-verdict: MERGEABLE @ <head>     ->  positive

Adding an indented-code stripper would be the same move that produced rounds 2, 3 and 4: fixing the
instance, not the class. So the grammar is narrowed instead — the marker must sit at COLUMN 0. That
kills every indentation-based ambiguity at once (4-space, tab, list-nested, arbitrary indent).

Cost, accepted deliberately: a verdict indented under a list item is now ignored and classifies
`absent`, which asks a human. For a gate, erring toward ignoring is the safe direction. Fence
detection KEEPS its leading-whitespace tolerance, because stripping more is always safe.

`test_leading_indent_is_tolerated` asserted the old behaviour and is replaced by
`test_falseopen_an_indented_verdict_is_not_a_verdict`, parameterised over four indent shapes and
mutation-verified: restoring `^[[:space:]]*` fails all four, control green. 172 tests.

Round 4 verified clean by execution: the rc plumbing fails closed for a forced failure in the inner
jq, awk, grep AND the pipeline producer (rc 3/4/5/93 -> exit 2); fence-length semantics, mismatched
markers, CRLF fences, 10-marker fences, blockquote fences; emoji, CRLF, a 120k line, 200 comments;
NUL rejection with no JSON-encoding bypass.

refs #629

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

Decisions-Edit: yes
2026-07-26 00:52:11 +02:00
timothyandClaude Opus 5 299e7b27af fix(629): round-3 fixes — fence LENGTH semantics, and stop masking reader failures
review-verdict/h10 Awaiting review verdict for 299e7b2
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Third review round, third set of real findings. Both reproduced before fixing.

1. High: markdown closes a fence only with N-or-more of the SAME marker it was opened with, so a
   ```` block legitimately CONTAINS a ``` line as content. Toggling on any 3+ marker left the
   fence at that inner line and graded the verdict below it as a real approval:

     ````text / ``` / Review-verdict: MERGEABLE @ <head> / ````   ->  positive

   Now tracks the opening marker's character and length; a shorter or different marker while a
   fence is open is content, so it neither closes the fence nor escapes it.

2. Medium: `awk ... | grep ... || true` flattened "no match" (grep rc 1, normal) together with a
   real tool failure (rc >= 2). A failing reader produced no verdict lines at all — `absent` —
   silently discarding a real BLOCKED verdict. awk and grep are now checked separately, and only
   "no match" is tolerated.

Also fixed while writing (2): `[ rc = 0 ] && printf` as the loop body's LAST command would leave
the subshell exiting 1 whenever the newest comment carried no verdict, which the rc check would
then report as a failure to read comment bodies — an ordinary PR reading as broken. Uses an `if`.

169 tests. Both findings mutation-verified: restoring the naive fence toggle fails all four
longer-fence cases, restoring `|| true` fails the failing-grep case, control green. Verified the
ordinary shapes still work: plain ``` and ~~~ fences and lang-tagged fences still stripped, an
unclosed fence still swallows, a real verdict beside a fenced example still counts, and a fenced
positive alongside a real BLOCKED still classifies negative.

refs #629

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

Decisions-Edit: yes
2026-07-26 00:47:40 +02:00
timothyandClaude Opus 5 f151b93245 fix(629): review fixes — tilde fences, an unbounded sha field, and a forgeable comment boundary
Cross-family review of 38a96f47 returned BLOCKED with three findings. All reproduced first:

  ~~~ fence           -> positive   fences were stripped for ``` only; markdown also takes ~~~
  @ <40hex>f / ZZZ    -> positive   the sha matched {7,40} with NO right boundary, so an
                                    over-long or malformed token was TRUNCATED into a passing one
  \x01BODY-BOUNDARY\x01 -> positive an in-band separator joined comment bodies, so a body
                                    containing that line forged a boundary, reset fence state
                                    mid-comment, and exposed a verdict inside an unclosed fence

Fixes: both fence markers honoured; the hex run matched whole, required to end at a
non-alphanumeric boundary, with its length validated separately so an out-of-range token is
rejected rather than trimmed to fit; and bodies carried OUT-OF-BAND (one JSON-encoded string
per line), which removes the forgery class instead of escaping the sentinel.

The third is the one worth remembering: an in-band delimiter is forgeable by whoever writes the
data, and here that is anyone who can comment on the PR.

Two of these fixes broke previously-green tests, both of which were right to break:
- an over-long token now classifies `no-sha`, not `stale`. The fixture asserting `stale` was 45
  hex chars, so it had been exercising the length guard while claiming to test the prefix rule.
  Rebuilt as a well-formed 40-char sha that contains the head prefix without starting with it.
- `jq -e` exits 4 when a filter produces NO output, which is the legitimate empty-comment-list
  case. Treating it as an error turned "no comments yet" into an input error — and callers fail
  closed on those, so a new PR would have read as unclassifiable. Exit 4 is now accepted.

44 classifier tests, 155 total. `~~~` and the boundary fixes are each mutation-verified; the
out-of-band fix has no equivalent mutation (it is structural, not a regex) so its evidence is the
direct reproduction against the previous commit.

refs #629

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

Decisions-Edit: yes
2026-07-26 00:47:40 +02:00
timothyandClaude Opus 5 0f83b54334 fix(629): close three false-opens in the H10 verdict grammar, and give it tests
The H10 classification lived inline in `pretooluse-merge-consent.sh` with no tests. Three
protections the `release.review-verdict-gate` record described were never actually
implemented, and each graded an unreviewed head as approved. All three reproduced first:

  1 MERGEABLE-LATER   -> positive     the token was prefix-matched, so any word STARTING
                                      with mergeable/approved/lgtm passed
  2 fenced code block -> positive     the line-start anchor is satisfied inside ```, so
                                      documentation showing the convention was a verdict
  3 URL-borne sha     -> positive     the sha came from the first `@<hex>` ANYWHERE on the
                                      line, so a markdown link could supply it

Fixes: whole-word token matching, with a token in neither vocabulary classified `unknown`
(never positive, and not guessed into a block either — it goes to a human); fenced blocks
stripped with fence state reset per comment body; the sha read from the verdict's OWN
`@ <sha>` field, which also makes multi-`@` lines unambiguous.

The grammar moves to `scripts/check-review-verdict.sh` so it can be tested at all — 38 tests,
and each fix mutation-verified: restoring the old regex/extraction makes exactly the
corresponding test fail, control green.

#629's fourth reported item is NOT a defect and is not claimed as a fix. A later `@ <head>`
on a BLOCKED line was reported as "masking a negative"; under the documented grammar that
line is a verdict for the sha in its own field, so `stale` is correct — and was correct
before this change too. Kept as a characterization test.

`test_post_review_verdict.py`'s cross-check re-implemented the hook's regexes in Python and
asserted the shell still contained them. That mirror is removed: it is the same duplication
that let these three survive, and a Python copy would keep passing while the shell drifted.
It now runs the real classifier.

The decision record is corrected — it asserted the URL protection this commit actually adds.

Note: the active corpus is 5637 lines against a 5600 budget, so the validator emits its
consolidation warning (non-blocking). That is #620's subject, not regressed here.

fixes #629

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

Decisions-Edit: yes
2026-07-26 00:47:40 +02:00
timothy 07e1e8cfbc fix(622): validate rename rows too; name the real blocker when only the verdict is pending
review-verdict/h10 Awaiting review verdict for 07e1e8c
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Third BLOCKED verdict, third legitimate finding. The per-row guard validated the
DESTINATION only, so `{"filename":"docs/x.md","status":"renamed"}` with no
`previous_filename` passed while its source silently vanished — precisely the
path-hiding that collecting both sides exists to prevent. A rename row must now
carry a non-empty `previous_filename`.

Required for rename rows ONLY. Demanding it globally would reject every ordinary
modified/added row and make the gate refuse all exemptions — which every
"withholds the exemption" test would happily pass through, so that direction gets
its own positive control. Predicate checked against ten shapes before adopting;
mutation-verified in both directions (dropping the clause fails 2 tests, applying
it globally fails 3 including the controls).

Also fixes a wart this PR introduced. `review-verdict/h10` is itself folded into
the COMBINED status, so a PR awaiting its verdict reports combined 'pending' and
the hook's condition (a) reported it as a CI problem — sending a reader to build
logs when the missing thing is the review, and exiting before the H10 branch that
would have said so. The message now names the outstanding contexts, and says
plainly when the verdict is the only one left.

Scope boundary, stated in the record: real Gitea populates `previous_filename` on
renames and returns well-formed pages. Everything past this point defends against
shapes with no evidence of existing, so the guard's claim stays "any page we
cannot fully classify withholds the exemption" rather than growing to cover
unobserved responses.

Decisions-Edit: yes
2026-07-25 22:43:30 +02:00
timothy fc547b2d46 fix(622): validate file pages per ROW, and de-vacuum the exemption tests
review-verdict/h10 Awaiting review verdict for fc547b2
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Second BLOCKED verdict, also correct. My previous fix validated only the
TOP-LEVEL type of each page, which left the same hole one level down: `[{}]` is
a well-formed JSON array whose rows carry no `filename`, so it contributes zero
paths, looks like a short final page, and completes the enumeration from a
PARTIAL list — the exact failure the guard exists to prevent, just wearing a
valid-looking wrapper. An array of scalars additionally tripped `set -e` during
extraction without producing a decision.

Both call sites now require every row to carry a non-empty string `filename`.
An empty array remains valid, since that is what a real end-of-pagination is.
Predicate checked against nine shapes before adopting: `[]` and well-formed rows
valid; `[{}]`, `[{"filename":""}]`, `[{"filename":null}]`, `["x"]`, `[1,2]`, a
bare error object, and a mixed good/bad array all rejected.

The reviewer also caught that my `test_first_page_failure_*` was VACUOUS: with
page 1 failing the path list is empty, and the hook independently withholds the
exemption on an empty list, so it passed with the guard removed. It is kept as a
smoke case with that limitation stated in its docstring, and three tests that
actually pin the behaviour were added — malformed rows and scalar rows after a
FULL page 1 (so the path list is non-empty and the exemption would really fire),
plus MAX_PAGES exhaustion.

Added a positive control too: an empty final page must still exempt. Without it,
an over-strict guard would make every "withholds the exemption" test pass for the
wrong reason — the suite would be asserting "never exempt", which is not the
contract. Verified by mutation: top-level-only validation fails 2 tests,
an over-strict guard fails the positive control, and widening MAX_PAGES fails the
exhaustion test.

Decisions-Edit: yes
2026-07-25 22:23:54 +02:00
timothy f6d01c4924 fix(622): make the exemption paging fail CLOSED; read statuses latest-per-context
review-verdict/h10 Awaiting review verdict for f6d01c4
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Cross-family re-review returned BLOCKED on the fix commit, correctly. Two of the
three findings were on the FAILURE path, which is why every happy-path run and
the whole first test suite looked fine.

1. (High/Medium) Both paging loops treated a failed or non-array page as a
   legitimate short final page: empty output counts as zero rows, zero rows reads
   as "end of list", and the enumeration completed from a PARTIAL list — failing
   OPEN at exactly the point the guard exists to fail closed, while the decision
   record claimed the opposite. Each page is now validated as a JSON array before
   its rows are counted; anything else withholds the exemption.

2. (High) The workflow's "is there already a verdict" pre-check read
   `/statuses/{sha}`, which returns one row per status POST rather than per
   context and pages at 50 — so a head with a few CI reruns can push a real
   verdict off the first page (this PR's head already carries 15 rows for 11
   contexts). Missing it there is not benign: the job would post `pending`, or an
   exemption `success`, OVER a human verdict. Both the workflow and the hook now
   read `/commits/{sha}/status` (latest-per-context), and the workflow refuses to
   post anything when that read fails rather than inferring "no verdict yet".
   Credit: raised independently by the parallel session on this issue.

3. (Low) The record claimed both callers withhold the exemption when enumeration
   cannot complete. True only after (1); the claim and the code now agree.

Adds scripts/tests/test_merge_consent_exemption.py — 9 tests over the hook's
exemption path via a curl shim, asserting behaviour when a page ERRORS or returns
a non-array body, not merely when it returns data. Mutation-proven: reverting the
array validation fails both failure-path tests; dropping `previous_filename`
fails the rename test.

One test I wrote was wrong and the run caught it: I asserted a
`.gitea/... -> docs/...` rename must break the hook's exemption, but that hook
deliberately exempts `.claude/`/`.gitea/`/`.husky/` too (to a human PROMPT, never
an auto-grant), so both sides legitimately match. The rename guard matters there
for a genuinely non-exempt source; the stricter PROTECTED semantics belong to the
workflow. Both cases are now pinned, including a positive control that a
docs->docs rename stays exempt.

Decisions-Edit: yes
2026-07-25 22:04:18 +02:00
timothy a9e3e23abf docs(622): record head-execution as verified, not conditional
review-verdict/h10 Awaiting review verdict for a9e3e23
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The workflow this PR introduces does not exist on `main`, yet its job ran on
#630 and posted a status — so Gitea runs `pull_request` workflows from the PR
HEAD. Limitation 4 was written as a conditional ("if Gitea runs..."); it is now
a confirmed property, which makes PROTECTED definitively a guardrail against
accident rather than a control against a PR that rewrites the classifier.

Same run also confirms the good case: #630 was correctly judged non-exempt on
its `.claude/`+`scripts/` paths and got `review-verdict/h10=pending`.

Decisions-Edit: yes
2026-07-25 21:53:57 +02:00
timothy 628ae46f7f fix(622): bind H10 merge consent to the reviewed sha via a required commit status
review-verdict/h10 Awaiting review verdict for 628ae46
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`pretooluse-merge-consent.sh` proves all three consent conditions at the moment
the merge tool is called. With `merge_when_checks_succeed=true`, condition (a) is
delegated to Gitea, which then merges whatever head is green at ITS merge time —
while (b) Done-when and (c) the head-referencing verdict were proven against the
head at SCHEDULING time. Every commit pushed in between merges unreviewed. The
gate is not bypassed; it is satisfied against a snapshot that stops being true.

Demonstrated as a controlled A/B rather than inferred, with a CI check left
pending so Gitea waits as it really does:

  without a required verdict context: unreviewed commit B MERGED
  with it:                            same sequence REFUSED
  after reviewing B and posting it:   merges — blocked, not deadlocked

NOTE the anecdote in #622 is wrong and is corrected in the docs rather than
repeated: PR #619 does carry `Review-verdict: MERGEABLE @ 02c82b35`, posted six
seconds before the merge, explicitly re-reviewing the follow-up commits. #622 was
filed off a lagging API read. The hole is real regardless, and structural —
nothing FORCED that re-review inside the window Gitea would have merged in. This
turns a property that held by diligence into one that holds by construction.

The fix is the sha, not a smarter check. A Gitea commit status belongs to exactly
one commit, so a status written for a parent cannot be inherited by a child that
did not exist yet. `review-verdict/h10` becomes a REQUIRED status check on main:
push a new head and the context is simply absent, which Gitea reads as
not-passing (verified against 1.25.4: missing AND pending both block, and
auto-merge re-checks the current head). It also covers merge paths the hook never
sees — Gitea UI, raw API, another agent's session.

- scripts/post-review-verdict.sh writes the comment and the status together so
  they cannot drift, and re-reads head after commenting: if a commit landed
  mid-flight it writes NO status and exits non-zero rather than retargeting the
  verdict at a commit nobody read.
- .gitea/workflows/review-verdict.yml auto-passes the two exempt classes that
  would otherwise deadlock — Renovate-authored (platformAutomerge) and docs-only
  — and marks everything else pending. Exemptions are void when the PR touches
  .claude/, .gitea/, .husky/, scripts/ or docker/ci/.
- The hook refuses to SCHEDULE an auto-merge unless that status is green on head,
  and no longer claims "CI green" on the mwcs path, where it never read CI.

Two silent false negatives in the exemption path, both found by verifying rather
than reasoning, both fixed at BOTH call sites (workflow and the hook's
pre-existing docs-only carve-out):

- The files endpoint caps at 50 rows and IGNORES a larger `limit` — PR #619 has
  194 changed files and `?limit=100` returns 50. A single page saw ZERO protected
  paths there where the full enumeration finds ten. Both now page to exhaustion
  and withhold the exemption if they cannot complete.
- A rename is ONE row whose `filename` is the destination, the source only in
  `previous_filename`. Verified live: `.gitea/workflows/renovate.yml` ->
  `docs/innocuous-note.md` presented as docs-only with no protected path visible.
  Both now read BOTH sides.

Limits are documented, not papered over: base changes leave the head sha (and so
the verdict) unchanged, and a PR editing the workflow is judged by its own edited
copy — so PROTECTED is a guardrail against accident, not a tamper-proof control.

fixes #622
2026-07-25 21:51:02 +02:00
timothy fba5233caf feat(610): split the decision corpus into one YAML-frontmatter file per record
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168 records -> docs/decisions/records/<area>/<topic>.md (163 active, 23 dirs) and
docs/decisions/archive/<area>/<topic>.md (5 archived). The filename IS the key,
so one-active-record-per-key becomes a filesystem property rather than a
validator check, and supersession becomes a `git mv`.

WHY: the monolith was a concurrency problem before an aesthetic one. A
3,900-line append target made parallel sessions collide -- PR #605 and PR #614
both hit append-vs-append conflicts during routine rebases, and hand-resolving
those inside the corpus is exactly the operation the rationale-rewrite guard
exists to police.

HOW IT IS VERIFIED: a ~170-file diff cannot be meaningfully read, so correctness
does not rest on reading it. The parser was taught BOTH formats first, so the
body-diff guard parses the old form at the merge-base and the new form at head --
the migration validates itself, no bypass. The proof is a field-level equivalence
harness: 168 records before and after, zero lost, zero gained, zero field
mismatches, zero rationale bodies differing. Reviewers should scrutinise the
harness; it is the actual evidence.

What measuring caught that reading would not have:

- ~500 lines sit OUTSIDE any record -- decisions.md's lifecycle schema and each
  topic file's preamble, mostly the only copy. Source files are kept and
  stripped, never deleted. They also cannot be filed per-area: topic files hold
  several areas and 4 of 23 areas span several files.
- Archive discovery was a non-recursive glob; after the split it found ZERO
  archived records, surfacing as four bogus "supersedes points to unknown key"
  errors rather than an obvious failure.
- ~32 live docs point into the corpus BY DATE, which the split dangles. Each
  stripped file now ends with a generated "Records formerly in this file" index,
  which also rescues the identical breadcrumbs in old issue comments.
- decisions.md's "In this file:" list was 97 same-file anchor bullets that the
  split makes WRONG, not merely stale. Dropped; the generated index replaces
  them with links that resolve.

The equivalence harness now runs against a checked-in FIXTURE, not the live
corpus. The earlier version migrated the real tree, which made it a one-shot:
the moment the migration landed there was nothing left to move and the tests
failed for reasons unrelated to the code. A fixture keeps them testing the
SCRIPT rather than the repo's current state.

Keys preserved verbatim, warts included: `sched` (12) and `scheduling` (1) remain
two directories for one concept. Renaming a key is not a move -- it changes
identity, breaks the equivalence proof, and invalidates MemPalace's per-key
drawers. Taxonomy normalisation is separate work.

refs #610
2026-07-25 19:45:09 +02:00