Commit Graph

5 Commits

Author SHA1 Message Date
Tom Boucher
8bfb5c47c9 fix(#3842): recover ack paths from pull requests past the per-PR file cap (#3857) 2026-08-25 11:36:27 -04:00
Tom Boucher
8d8e9ef5eb fix(#3842): stage the emitted-drift-ack sweep so it does not conflict in-flight PRs (#3847)
* fix(#3842): stage the emitted-drift-ack sweep around open PRs

The guard-no-ack-on-next sweep (#3078) deleted every all-spent fragment
under tests/emitted-drift-acks/ unconditionally. When an open PR still
modified the same fragment file, that delete became a modify/delete
conflict on the PR's next merge attempt -- the exact shared-file
conflict fragments were adopted (#2914) to eliminate, reintroduced by
the sweep itself. The first real sweep hit three open, outside-
contributor PRs simultaneously (#3330, #3774, #3648), each with the
swept fragment as its only conflicting path.

assertNoAllSpentFragments now accepts an optional openPrTouchedPaths
set (or the sentinel 'unknown') and partitions all-spent fragments
into "safe to sweep" and "held" -- a held fragment is reported
informationally, never as a failure, and is swept once the touching
PR merges or closes. fetchOpenPrTouchedAckPaths computes the touched
set with a single `gh pr list --json number,files` call. The guard-next
codepath is factored out of main() into the exported, dependency-
injectable runGuardNext() so this wiring is unit-testable without a
real, network-dependent `gh` binary.

The new behavior is strictly opt-in via a --defer-to-open-prs flag,
wired only from the guard-no-ack-on-next job in test.yml (which also
gains pull-requests: read and a GH_TOKEN env for the `gh` call). Every
pre-#3842 caller -- including every existing test -- is unaffected
when the flag is omitted.

CONTRIBUTING.md's "Why fragments, not one file (#2914)" section now
documents the staged-sweep policy so it no longer reads as though
fragments are unconditionally conflict-free once spent.

Refs #3842
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

* fix(#3842): unify the failed-open-PR-check message to one greppable phrase

The remote matrix (commit 4ec4527fb) failed two tests on the fail-closed
path: assertNoAllSpentFragments's 'unknown' sentinel branch described the
failure as "...could not be determined this run...", while runGuardNext's
catch around fetchOpenPrTouchedAckPaths described the same condition as
"open-PR check failed (<err>)". Both messages were genuinely present and
informative (not missing or empty), but they used different wording for
the same fail-closed condition, so there is no single string a human
scanning CI output can search for to find out why nothing got swept.

Unify both sites on "open-PR check unavailable" -- runGuardNext's line
now reads "open-PR check unavailable — <err.message>", and
assertNoAllSpentFragments's holdAll message now leads with "deferred
(open-PR check unavailable): ...". This is a real fix to the fail-safe
path's diagnosability, not a relaxed test assertion: the two now-failing
tests already expected this exact phrase, and the fix makes the code
say what the tests (correctly) expected instead of loosening them to
match arbitrary prior wording.

Refs #3842
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

* chore(#3842): backfill changeset PR number and retype to Fixed

pr:0 backfilled to 3847. Retyped Changed -> Fixed: the change repairs broken sweep behaviour rather than adding any, and its contributor-facing documentation lives in CONTRIBUTING.md at the repo root, which lint-docs-required does not count.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

---------

Co-authored-by: sim <sim@local>
Co-authored-by: Claude Opus 5 <noreply@anthropic.com>
2026-08-25 00:08:14 -04:00
Tom Boucher
a84f756303 fix(#3078): sweep all-spent ack fragments on next, name the collision remedy (#3823)
* fix(#3078): sweep all-spent ack fragments on next, name the collision remedy

`guard-no-ack-on-next` only ever watched the legacy tests/emitted-drift-ack.json.
#2914 exempted the fragment directory on the premise that a persisting fragment
"cannot conflict with any other PR". Fragments do not share a FILE, but they do
share a PATH KEY SPACE, and a path claimed by two sources is a hard failure in
the same script -- so a fully-spent fragment on next owns keys it can no longer
gate, and the next PR to grow one of those paths can declare it neither there
(spent) nor in its own fragment (duplicate). Measured at the sweep: 45 fragments
owning 403 paths, up from 13/272 at triage 19 days earlier.

- `assertNoAllSpentFragments` fails a fragment only when EVERY surviving entry is
  spent against the copy at HEAD^, so a partially spent fragment -- and the
  re-arm-by-appending route #2639/#2993 ship on -- keeps working.
- `ackProse` duplicates the gate's zero-width/whitespace stripping across the
  scripts-ship/tests-do-not line, bounded by a prose-parity test.
- The guard job's checkout takes fetch-depth: 2; at depth 1 HEAD^ is absent and
  every fragment reads as brand-new, i.e. the guard passes vacuously.
- The duplicate-ack error now names both resolutions, since the guard is
  post-merge by design and cannot stop the colliding PR.
- All 45 spent fragments deleted, 0000-legacy-migration.json included, and the
  three tests that pinned its permanence corrected.

Verification is the remote runner (gsd-test), not a local suite.

Closes #3078

* fix(#3078): make the prose-parity test two-sided, cover the git seam, base on the pre-push tip

Three review findings, all fixed:

- The parity test was a tautology: it checked ACK_INVISIBLE against a
  hardcoded list matching its own definition, never against the gate. The
  gate's INVISIBLE and its reason normalizer (hoisted out of diffEmitted as
  normalizeAckReason) are now exported for that sole purpose, and the test
  sweeps 0x00-0xFFFF against both surfaces. Mutation-checked: adding a
  codepoint to one side and not the other now fails.
- resolveBaseRef, readFragmentAtRef and assertUsableBaseRef had zero direct
  coverage -- the tests reimplemented the git reads in a local helper, so the
  ls-tree-vs-show discrimination, the root-commit fallback and the
  option-injection guard were never executed. All are exported and tested
  against real temp repositories now, plus an end-to-end --base-ref subprocess.
- HEAD^ is not 'the state of next before this push'. The default branch allows
  REBASE merges, so one push can carry N commits, and a 2-commit rebase-merge
  whose first commit adds a fragment would be told to git rm it on the very
  push that introduced it. CI now passes github.event.before via --base-ref and
  fetches it explicitly; HEAD^ remains only the local fallback.

Also adds the safe.directory guard every other git call in this repo carries
(#2767), and stops naming the deleted migration fragment by filename in
CONTEXT.md, which tripped lint-removed-but-needed.

Refs #3078

* fix(#3078): keep the fragment directory alive after the sweep empties it

Sweeping every fragment leaves the directory untracked, and check-glossary-refs
then fails: CONTEXT.md references tests/emitted-drift-acks, which no longer
exists. The empty directory IS the intended steady state, so it has to survive
its own remedy.

Adds tests/emitted-drift-acks/README.md documenting the create/use/delete
lifecycle where a contributor actually meets it, matching the existing
tests/qa/smell-acks/README.md precedent. Every reader filters on .json, so the
README is invisible to the gate.

Also sweeps #3809's ack fragment, which the rebase onto origin/next brought in
and the new guard immediately reported as all-spent -- its own remedy applied.

Refs #3078

* fix(#3078): guard the added tests' git calls, drop a second fragment-existence pin

Both defects surfaced by the remote runner (linux-node24, 4/37445 failed).

- The new --base-ref E2E test ran `git rev-parse HEAD` against the checkout
  without the #2767 safe.directory guard. The runner mounts the repo at a path
  owned by another uid, so git refused every operation there with 'detected
  dubious ownership'. Every git call the new tests make now names its own
  specific directory as safe, via one local helper, mirroring safeDirArgs in
  helpers/emitted-runtime.cjs.
- tests/agent-tracked-source-rule.test.cjs pinned the existence and contents of
  the 3645 and 3409 ack fragments. That is a merged PR's paperwork, not live
  behavior: once the growth is in next's baseline the acks are spent and this
  PR's guard sweeps them. The third assertion pinned the hand-appended
  workaround for the exact collision #3078 removes. Deleted; #3645's real
  protection is the two behavioral tests above it, untouched.

Also restores #3809's ack fragment, which merged one commit before this branch.
Deleting an ack in the same window as its introducing PR races any consumer
whose baseline predates it -- the runner's container proved it, resolving
origin/next to 8ed105c8a where the file is still 13847. The backlog sweep is
this PR's scope; that fragment is left for the guard's own first run.

Adds the rule to the fragment README so the class stops recurring.

Refs #3078

* test(#3078): derive the E2E guard expectation from the fragment inventory

The --base-ref E2E test asserted exit 0 while passing the checkout's own HEAD
as the base ref. HEAD-as-base makes every present fragment byte-identical to
itself, so all of them are trivially all-spent and the guard correctly exits 1.
The test only ever passed because the directory happened to be empty when it
was written; restoring #3809's fragment made it fail. The script was right and
the test was wrong.

The degenerate base ref is kept deliberately -- it is what makes 'spent'
trivially true and therefore deterministic -- but the expectation is now
derived from listFragmentFiles() at runtime: zero fragments means exit 0 and
the no-survivors line, N fragments means exit 1 with every name and its git rm.
Proven state-independent by running the suite with the fragment present, with
the directory emptied, and with it restored.

The option-shaped --base-ref rejection is split into its own test, unchanged.

Refs #3078

* chore(#3078): backfill PR number into the changeset fragment (pr:0 -> pr:3823)

---------

Co-authored-by: sim <sim@local>
2026-08-24 15:24:30 -04:00
Tom Boucher
c043f2946c fix(#2914): per-PR ack fragments instead of one shared mutable file (#2923)
* fix(#2914): never persist a spent emitted-drift ack on next

tests/emitted-drift-ack.json held 34 spent #2834 entries merged via #2900.
Every entry is scoped to the diff that introduced it (#2789), so once merged
to next it is at the base by definition -- spent and inert. Its presence is
still load-bearing though: each PR rewrites the paths map wholesale, making a
persistent base copy a shared cell. Five of six conflicting PRs in the open
queue collided on this file and nothing else.

Deletes the stale document and adds a push-to-next guard asserting it stays
absent. The guard is deliberately NOT wired into lint:ci -- a PR-lane check
against the base is the #2768 shape #2789 exists to end.

Closes #2914

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

* chore(#2914): backfill changeset pr number

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

* fix(#2914): per-PR ack fragments instead of one shared mutable file

The emitted-drift acknowledgment lived in a single tests/emitted-drift-ack.json
whose paths map every PR rewrote wholesale. That is a shared mutable cell: any
two PRs needing an ack edit the same lines and conflict. Five of six conflicting
PRs in the open queue collided on this file and nothing else.

Acks now live as per-PR fragments under tests/emitted-drift-acks/, the same
shape .changeset/ already uses to solve this exact problem. Two PRs pick
different filenames, so they cannot collide, and fragments lingering on next
are harmless rather than toxic.

The legacy file's 35 entries are MIGRATED into a fragment, not deleted. An
earlier delete-only attempt failed verification twice: the ratchet lost the
spec-phase.md acknowledgment from #2779 and reported a 10-byte growth with no
ack. Relocating preserves every acknowledgment.

The legacy single file is still READ (unioned with the fragments) because five
open PRs carry it; dropping support would break all of them. A duplicate path
key across sources is a hard error, never last-wins.

The push-to-next guard is retargeted accordingly: it now asserts only that the
legacy SHARED file never reappears on next. Fragments may persist harmlessly.

Closes #2914

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 5 <noreply@anthropic.com>
2026-07-31 13:15:29 -04:00
Tom Boucher
1e3c995e6f fix(#2789): scope the emitted-drift ack to the diff that introduced it (#2803)
* fix(#2789): scope the emitted-drift ack to the diff that introduced it

Every input to `diffEmitted` is base-relative -- `baseline` vs `current`,
`changedPaths` from `git diff base...HEAD` -- except the ack set, which
was read absolutely, from the working tree only. A differential machine
consulting a non-differential input.

So `staleAcks` asks exactly one question, "did a delta consume you?", and
that cannot distinguish an ack that never explained anything (an
authoring mistake) from one whose ripple is now absorbed into the base
(the ack's SUCCESS condition). After merge an ack is in the second state
but reports as the first.

The trigger is ordinary. Actions sets GITHUB_BASE_REF on pull_request
events only, so a push to `next` falls through to origin/next -- the very
commit under test. Both sides build identical content, no deltas remain,
and every live ack is reported stale. PR #2768 acked a deliberate 40866
-> 42020 byte growth, was green on its own lane, and reddened `next` the
moment it merged. It also reds every PR branching off the poisoned base,
and since publish-emitted-baseline is gated on the test job, it blocked
baseline publication too.

Give the ack the base side it was missing. `diffEmitted` now takes
`baseAck` -- the same document at the base ref, via `readAckFileAtRef`.
An entry already present there is SPENT: it may no longer consume a delta
and is never reported stale, only surfaced as `spentAcks` for tidying. An
entry new or reworded in this diff stays live, and if nothing consumes it
that genuinely fails, with blame on the author who just wrote it.

This closes a hazard the IMPLEMENTATION named but could not prevent -- a
leftover ack silently pre-clearing the next ripple on its path. (ADR-2719
§3 asserted only that TOUCHING the file is the alarm; its residual-risk
list never covered pre-clearing, and §3 now carries an amendment.)
Verified against the two-PR laundering sequence -- land an innocuous ack,
then change the artifact -- which passed silently before and now fails on
both the hash pass and the size ratchet.

Three things the design has to get right, each of which was wrong first:

  - A read failure on the base document THROWS; only absence-at-the-ref
    returns null. Returning null on error LOOKS armed (every entry stays
    live) but a live entry's defining power is that it CONSUMES a delta,
    so null is armed on the staleness axis and DISARMED on consumption --
    silently the whole pre-#2789 gate. `git show` cannot tell absence
    from fault, so absence is established with `ls-tree`.
  - Re-arming a spent ack costs actual PROSE. Internal whitespace and the
    zero-width family collapse, and `runtime` is not compared: a doubled
    space, an invisible character, or a decorative field would otherwise
    re-arm an ack whose justification still describes the previous
    ripple, showing a reviewer nothing.
  - `baseAck` is REQUIRED once an ack declares entries -- omission is an
    error, not a silent "inherit nothing" -- so a dropped argument fails
    loudly instead of quietly restoring this bug with the suite green.

Because a corrupt document ON THE BASE is expensive (the loud base-side
failure reds every ack-carrying PR), scripts/lint-emitted-drift-ack.cjs
blocks one from landing. It is standalone rather than importing parseAck
-- scripts/ ships in the npm package and tests/ does not -- so a parity
test runs both surfaces over one corpus and fails on divergence; it
caught one immediately, a `null` document, now classed as policy rather
than schema. Deadlock is separately foreclosed: a tree carrying no ack
never reads the base, so the PR that DELETES a corrupt file still lands.

`readAckFileAtRef` takes an injected git runner so all four branches are
tested deterministically; it never executes in the remote runner, where
the real-tree test skips for want of a base ref. It also refuses an
option-shaped ref, since execFileSync's array form stops shell
metacharacters but not git's own option parsing.

Rejected: skipping the differential when base == HEAD. It treats the
symptom, costs real coverage on the push-to-next lane, and does nothing
about the downstream PRs the same flaw was reddening.

Deletes the now-spent tests/emitted-drift-ack.json, and updates the
CONTEXT.md canon and ADR-2719 §3: presence is no longer the alarm -- a
LIVE entry is, and a spent one is inert.

Closes #2789

* chore(#2789): backfill changeset PR number
2026-07-28 21:28:10 -04:00