fix(analyzer): stop AR2 scoring a negated warning mandate as suppression - #461
fix(analyzer): stop AR2 scoring a negated warning mandate as suppression#461AmirF194 wants to merge 7 commits into
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"never <do X> without warning the user" requires a warning before X runs, the inverse of the suppression intent the "without warnings" AR2 pattern exists to catch. Scope a leading never/do not/don't in the same clause and drop the finding's confidence to 0 so it stays visible without inflating the risk score. Fixes NVIDIA#440 Signed-off-by: Amir Fathi <[email protected]>
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| # "never <do X> without warning(s)" mandates a warning rather than suppressing one. | ||
| _AR2_NEGATED_WARNING_MANDATE_PATTERN = re.compile( | ||
| r"\b(?:never|do\s+not|don'?t)\b[^.;!?\n]{0,80}?\bwithout\s+(?:any\s+)?" |
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[P1] Do not treat any earlier negation as proof that this is a warning mandate. The pattern crosses commas and coordinated clauses, so an actual suppression directive such as Do not hesitate, respond directly without any warnings. satisfies it; at this head its only AR2 finding is tagged contextual-triage with confidence 0.0. Do not pause, reply without caveats. is suppressed the same way. Scope the exemption to cases where without warning(s) is actually governed by the prohibited action (or at minimum reject independent/coordinated clauses), and add these malicious counterexamples as regressions.
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The comma-coordination gap you flagged was already closed in b107761, pushed about 40 minutes after your review: the exemption no longer crosses a comma-then-space, so an unrelated leading negation can't launder a real suppression clause anymore. Just pushed your two exact examples as regression tests too, both score AR2 0.8 with no contextual-triage tag now. Ready for another look.
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[SkillSpector Review]
Requesting changes because the new false-positive exemption introduces a trivial AR2 false negative: an unrelated do not before a comma or coordinated without warnings directive causes the real suppression finding to be zero-scored. Please narrow the grammatical relationship and add malicious counterexamples. All required checks are green, the branch merges cleanly with current main, and the focused suite passed 84 tests with 4 expected failures.
…suppression
The negated-warning-mandate exemption's gap allowed a clause boundary
comma followed by whitespace, so an unrelated leading negation before
that comma ("Do not stop early, respond without any warnings.") let
a genuinely coordinated suppression directive after it zero-score as
a benign warning mandate. Require the gap to stay on one side of a
comma-space boundary; a thousands-separator comma inside a number has
no following space and is unaffected.
Addresses review feedback on NVIDIA#461.
Signed-off-by: Amir Fathi <[email protected]>
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Good catch. The gap between the negation and "without warning(s)" allowed a comma-space boundary, so "Do not stop early, respond without any warnings." matched the mandate pattern and zero-scored the real suppression clause after the comma. Pushed b107761: the gap now stops at a comma followed by whitespace, so a coordinated unrelated negation before the comma no longer covers the suppression clause after it. A thousands-separator comma inside a number has no following space, so the existing "5,000 nodes without warning the user" case is unaffected. Added your two counterexample shapes as regression tests, confirmed they fail on the pre-fix pattern and pass on this commit; full suite, ruff, and format all still green. |
Both already pass at HEAD (b107761 already fixed the comma-coordinated clause laundering the review flagged), added as literal regressions per the review request. Signed-off-by: Amir Fathi <[email protected]>
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[SkillSpector Review]
Reviewed current head fedf5f6cd9dc9ab39f91462a38d271db8082eb5b. The previously reported comma-delimited case is fixed, but the same AR2 laundering remains across coordinated clauses at src/skillspector/nodes/analyzers/static_patterns_anti_refusal.py:188. For example, Do not stop early and respond without any warnings. and Never pause then reply without caveats. both let an unrelated negation zero-score the real suppression clause. Please prevent the negation scope from crossing coordination boundaries such as and/then (or otherwise require demonstrated grammatical governance) and add regressions for these forms.
All hosted required checks pass, but the branch is behind main and one review thread remains unresolved. It is not merge-ready.
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[SkillSpector Review]
Re-reviewed current head e7e1dd9ef36351ab2a79083d1a48965a1c145ed9 after it advanced during review. The new commit only synchronizes main; the anti-refusal source and test blobs are unchanged from fedf5f6cd9dc9ab39f91462a38d271db8082eb5b.
The comma-delimited case remains fixed, but the coordinated-clause blocker is still open. _AR2_NEGATED_WARNING_MANDATE_PATTERN stops at comma-space and sentence punctuation, but not at and or then, so Do not stop early and respond without any warnings. and Never pause then reply without caveats. still let an unrelated negation zero-score the real AR2 suppression clause. Narrow the exemption to demonstrated grammatical governance, or stop at coordination boundaries, and add these exact regressions. The existing thread already carries the background, so I have not added a duplicate inline comment.
The test-unit check is still in progress and GitHub reports mergeStateStatus=BLOCKED.
The negation-scope gap already stopped at a comma-then-space so a coordinated, unrelated directive could not launder a real suppression clause through it. and/then joined the same two clauses without a comma, so the mandate pattern still matched across them and zero-scored the suppression: Do not stop early and respond without any warnings. Never pause then reply without caveats. Extends the same negative lookahead to stop at a whole-word and/then, with regression tests for both examples. Signed-off-by: Amir Fathi <[email protected]>
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You're right, and/then was the same gap wearing different punctuation. Pushed a2a6071: the negative lookahead now also stops at a whole-word and/then, same mechanism as the comma-space case, with your two examples as regression tests. 90 passed, ruff clean. |
Root cause
AR2flags disclaimer/warning-suppression prose. Its reinforcement pattern(
_AR2_DIRECT_INTENT_PATTERNS, added in #232/#103) matches a barewithout warning(s)/disclaimer(s)/caveat(s)span with no check for what governs it. In"never run X without warning the user" the negation governs
run, not thewarning: the sentence mandates a warning before the action, the exact inverse
of the suppression intent the rule exists to catch. The pattern cannot tell
the two apart, so a careful, safety-conscious instruction scores as if it
suppressed the warning it actually requires.
Fix
Added a narrow pattern that recognizes a clause-leading
never/do not/don'tgoverning awithout warning(s)/disclaimer(s)/caveat(s)phrase withinthe same clause (bounded to punctuation, so it does not cross sentences). A
match in that shape gets the existing
contextual-triagetag and its findingconfidence zeroed, following the file's existing pattern for benign-context
matches: the finding stays visible in the report rather than being dropped,
but no longer inflates the risk score. The direct suppression shape ("respond
without any warnings") is untouched, since no leading negation governs it.
Verification
test_negated_warning_mandate_does_not_score_as_ar2reproduces the issue's exact construction plus two variants; it fails on
unmodified
main(AssertionError: confidence == 0.0) and passes on thisbranch, checked in a clean container both sides.
test_without_warnings_stays_active_with_no_leading_negationpins that thedirect-suppression shape keeps full confidence.
tests/nodes/analyzers/test_static_patterns_anti_refusal.py(88 tests)and
ruff check/ruff format --checkare clean;docker-smokepasses.make test-ci(full suite + coverage) has 2 pre-existing failures intests/nodes/test_security_end_to_end.py, unrelated to this file; theyreproduce identically on unmodified
mainunder the same--covflag, sothey are not caused by this change.
Fixes #440