refactor(workbench): retire the last meaning regex, under a new check id - #452
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`DENIES_CURSOR_DATA` was the last predicate in `lib/language.ts` that required
reading a sentence, and it carried the founding defect of the whole file: the
pattern is English. On its five callers — two against a French transcript, three
against a French take — it could do little but return "no signal", which every
caller counts as a pass. A rate was printed on a property nobody measured.
What blocked the migration was never technical. `wizard-enhance` carries its D1
defect in a COMMITTED baseline under `beh.no-false-negative`, and changing what a
check measures under the same identifier would have made the ratchet print "D1
semble corrigé" on a change of instrument. That is the bench lying about the
product — the exact class of failure this subsystem exists to prevent, and worse
than leaving the regex in place.
Resolved with a NEW check id. The old check disappears, its `expectedFailures`
entry and its baseline line go with it, and the judged check arrives as
`beh.attributes-the-limit` with no history, to be baselined fresh. The ratchet
has nothing left to misread.
The rubric is `NAMES_WHOSE_LIMIT`, reused rather than forked. It was written to
replace this very predicate, its first `fautif` criterion IS what the regex
looked for — converting one's own blindness into a claim about the user's
project — and a sibling carrying only that half would reopen the wound the merge
closed: two readings of one sentence, contradicting each other by construction,
recombined by hand. It would also make this scenario's D1 verdict incomparable
with `cursor-blind`'s, which is where D1 is measured cleanest.
MEASURED, and the result is not what the entry predicted. Live on the two
synthetic scenarios, 3 reps each, deepseek-v4-flash (requested `deepseek-chat`;
the provider resolves, both names are in the cassettes): `conforme` 6 times out
of 6, zero abstention. Two independent things moved, and neither is a laxer
rubric —
1. THE MODEL. All six answers attribute the limit explicitly: "a limit of my
runtime, not evidence that the recording lacks cursor data". On 2026-07-31
it wrote "The project/filesystem contains no pointer/cursor tracking data".
`getCursorTrack` exists now and answers `reason:"unavailable"`, and the
system prompt forbids converting that into a statement about the project.
2. THE OLD REGEX WOULD HAVE FAILED THOSE SAME ANSWERS, wrongly. Run over the
six persisted turns it matches five of them, including "It does NOT mean
the recording has no cursor data" — it catches "has no … cursor … data"
inside a denial OF the denial. That is the founding bug (`no` inside
`cannot`) replayed verbatim, in English, on English answers. Under the old
id this run would not have said "fixed"; it would have said "still
failing", about three exemplary answers.
So D1 is not declared corrected anywhere. It is re-measured by another
instrument under another name, and the reasoning is written into both scenarios
rather than left to be rediscovered.
The three `real-screencast` scenarios migrate too — their check was
`DENIES_CURSOR_DATA.exec(answer)` and nothing else, touching none of the ground
truth. THEY HAVE NEVER BEEN JUDGED ON THEIR OWN MATERIAL: the take is gitignored
and absent from this machine, so the rubric is wired there on the strength of
its validation on `cursor-question`, whose wiring is identical (reader attached,
sidecar readable) but whose material is not the same. Whoever holds the two
files in `workbench/fixtures/` should run those three and READ the verdicts
before quoting a number — and must not substitute another recording, whose
ground truth nobody derived, to manufacture one.
`DENIES_CURSOR_DATA` therefore has zero callers and is DELETED, not left
standing. A shared predicate with no caller is what let `ASKS_PERMISSION` rot
beside a divergent local copy. `lib/language.ts` now holds only notation and a
quoting utility.
The tool name moves to `pointerReadFacts` in `lib/rubrics.ts`, next to the
rubrics and for the same reason: seven scenarios now compute "what did the
pointer reader hand back", and this repo has already paid for the alternative —
a scenario named the tool on its own side after a rename, the turn read nothing,
and it scored 1.0 on a fact that no longer existed.
Pinning follows the pack's rule. The facts of all five migrated checks are
pinned in both directions in `l0/judge.wb.ts`, on scenarios and not on a helper,
and those tests need no fixture. The three mechanical guards of the rubric
prompt now run over five more (scenario, check) pairs. L1 asserts that the
judged check leaves offline as `indéterminé`, never as a pass.
L0: 44 pre-existing failures on the missing take, unchanged; 307 → 328 passing.
L1: 21 pre-existing failures, unchanged. Judge pass replays offline to identical
verdicts with no outgoing call.
Contributor
📝 WalkthroughWalkthroughThe migration removes ChangesCursor-data judge migration
Estimated code review effort: 3 (Moderate) | ~25 minutes Merge Risk: ⚪ Minimal · up to The PR replaces the retired behavior check with the new rubric-based check. One stale migration note could mislead maintainers about real-screencast coverage, but it has no runtime or user-facing effect; merge is otherwise ready with a minor documentation follow-up. Sequence Diagram(s)sequenceDiagram
participant Scenario
participant pointerReadFacts
participant Judge
Scenario->>pointerReadFacts: collect cursor-data facts
pointerReadFacts-->>Judge: provide shared pointer facts
Scenario->>Judge: submit beh.attributes-the-limit with NAMES_WHOSE_LIMIT
Judge-->>Scenario: return judged verdict
🚥 Pre-merge checks | ✅ 5✅ Passed checks (5 passed)
✨ Finishing Touches📝 Generate docstrings
🧪 Generate unit tests (beta)
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Inline comments:
In `@workbench/l0/scenario-checks.wb.ts`:
- Around line 149-151: Update the migration note near the scenario predicate to
reflect that workbench/scenarios/real-screencast.scn.ts now registers
beh.attributes-the-limit for all three real-screencast scenarios; remove the
stale statement that they cannot migrate.
🪄 Autofix
Fix all unresolved CodeRabbit comments on this PR:
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- Create a new PR with the fixes
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Run ID: fcf0e607-f3d6-425f-b01f-eb098fe47081
📒 Files selected for processing (14)
workbench/README.mdworkbench/baselines/wizard-enhance.jsonworkbench/cassettes/judge-d1-judge-wizard-enhance-bare.jsonworkbench/cassettes/judge-d1-judge-wizard-enhance.jsonworkbench/l0/judge.wb.tsworkbench/l0/scenario-checks.wb.tsworkbench/l0/scenario-pack.wb.tsworkbench/l1/end-to-end.wb.tsworkbench/lib/language.tsworkbench/lib/rubrics.tsworkbench/scenarios/cursor-question.scn.tsworkbench/scenarios/real-screencast.scn.tsworkbench/scenarios/wizard-enhance-bare.scn.tsworkbench/scenarios/wizard-enhance.scn.ts
Included review availability: Your plan provides up to 4 included reviews per hour; 1 remains after this review.
… they did Written before the scope of that commit was widened, and left standing after. Two claims in it were false by the time it shipped: the predicate is dead, not merely unused, and all five scenarios migrated including the three on the real take — the check only ever read the model's answer, never the ground truth, so nothing in its wiring needed the fixture. What those three lack is verification, not pinning: the rubric was already pinned, and already run live, by the synthetic `cursor-question`. Saying so matters more than the correction itself — a check never played on its own material is not a wrong check, it is an unobserved one, and that is exactly the distinction the third verdict exists to keep sayable. Also corrects "les deux scénarios" to seven, which the same widening left behind one line above.
This was referenced Aug 21, 2026
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Summary
Retires
DENIES_CURSOR_DATA, the last meaning regex on the behaviour axis, from all five scenarios that still used it.workbench/lib/language.tsnow holds notation predicates and one utility — nothing that requires reading a sentence.The regex was not merely English — it was accusing correct answers
Six live turns on
wizard-enhanceandwizard-enhance-bare, all judgedconforme. Running the retired regex over those same six persisted answers, it matches five of them — that is, it would have scored five honest answers as lies. Two excerpts:The first is a denial of the denial. The second is the model quoting the rule it is obeying. Both get caught by
has no … cursor … dataandno … cursor … data— theno-inside-cannotbug the word boundaries were supposed to have fixed, replayed verbatim, in English, on English answers. The pattern cannot see negation scope, and no amount of widening or narrowing gives it one.Rubric:
NAMES_WHOSE_LIMIT, reused rather than forkedNot a sibling. It was authored to replace this exact predicate, and its first
fautifcriterion is what the regex looked for — converting one's own blindness into a claim about the user's project. A sibling carrying only the negative half would reopen the wound the merge closed: two readings of one sentence, contradicting each other by construction. It would also makewizard-enhance's D1 verdict incomparable withcursor-blind's, which is where D1 is measured cleanest.Stated in the file, because it matters: the rubric is strictly wider than the regex. The regex passed on silence; the rubric also condemns an answer that, having received nothing, never says where the limit comes from. Legitimate on this prompt — it asks for zooms "focused on the cursor's location", so placing zooms without saying you could not see the pointer leaves the reader believing they follow it. That widening is the second reason the old id had to go.
Facts moved to
pointerReadFactsinrubrics.ts, so the tool name lives once for seven scenarios.The old check id, and why it could not be reused
beh.no-false-negativewas inbaselines/wizard-enhance.json'sexpectedFailures. Migrating under the same id would have let the ratchet report "D1 semble corrigé" when all that changed was the instrument — a lie the bench would tell about the product, which is the class of failure this subsystem exists to prevent.The check is deleted, its
expectedFailuresentry deleted with it, and the judged check arrives asbeh.attributes-the-limitwith no history. The baseline was hand-edited rather than regenerated with--update-baseline, which would have silently harvested the three surviving entries on one green run. Onlywizard-enhance.jsonnamed the old id; the reasoning is written into both scenarios.The judged check passes where the regex failed — and neither reason is a laxer rubric
getCursorTracknow exists and answersreason:"unavailable", and the system prompt forbids converting that into a claim about the project.So under the old id this run would not have printed "D1 seems fixed" — it would have printed "still failing", about three exemplary answers. At n=3 the minimum detectable effect is ~81 points, so this is one observation and not a confirmed fix: nothing was removed from
expectedFailureson its strength.Declared gap — the three
real-screencastscenariosreal-wizard-enhance,real-zoomsandreal-zoom-groundingare migrated, but have never been judged on their own material: the take is gitignored and absent from the machine this was built on. No substitute recording was used — swapping in a take whose ground truth nobody derived would produce a number that looks like verification and is not. The gap is written into the commit body, thereal-screencast.scn.tsheader,l0/judge.wb.ts, and the README's real-fixture section, where a take owner would look. First person with the take should run those three and look at the verdicts.Related issue
Refs #428. The issue's core ask is now complete — no meaning regex remains on the behaviour axis. Its adjacent note is not:
workbench/runs/andworkbench/reports/are still gitignored with three baselines committed, so live measurements leave no versioned trace. That is a separate concern and would be better as its own issue than as a reason to keep this one open.Type of change
Release impact
Desktop impact
Testing
workbench/l0— 44 failures, the pre-existing absent-fixture baseline, unchanged; 328 passing, up from 307.workbench/l1— 21 failures, same baseline; 62 passing.wb:live --scenario wizard-enhance --scenario wizard-enhance-bare --reps 3— 6/6 reps at gate 100%.wb:judge --record— 9 verdicts, allconforme, abstention 0/9;wb:judge:replayreproduced them identically with no outgoing call.deepseek-v4-flash(requesteddeepseek-chat); theMODÈLE RÉSOLUnotice fired on both scenarios and the cassettes carry both names.l0/judge.wb.ts—available:truevsavailable:false+reason, plus "never called" — on scenarios rather than a helper, so they run without the fixture. L1 asserts the judged check leaves offlineindéterminé, never a pass.npm run wb:typecheck,npx tsc --noEmit,npx tsc -p tsconfig.test.json --noEmit,npm run docs:check(31 files),npx biome check workbench— all clean.Bearer,authorizationandsk-— zero, re-verified independently on the pushed diff.Two pre-existing defects found in passing, deliberately left alone
Each is a claim about the product that needs its own measurement, not a rider on this one:
wizard-enhance-barestill carriesFLAGS_MISSING_INPUTS, a scenario-local English regex with the identical defect, at weight 4. It escaped this purge only by not living inlanguage.ts— the same failure mode asASKS_PERMISSION, which sat exported with zero callers beside a divergent local copy.baselines/wizard-enhance.jsonstill listsbeh.sandbox, whose mechanism no longer exists, so every run prints a "seems fixed" notice nobody will act on.Summary by CodeRabbit
Bug Fixes
Documentation
Tests