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Analyze why the V4 focused gate failed - #3535

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Analyze why the V4 focused gate failed#3535
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@joshlf joshlf commented Aug 3, 2026

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Trace V4's scored misses to missing semantic premises while preserving the
official failed result. The reports commonly identify the right risk and even
the right witness, but close the proof with an uncited reading of syntax.

In Boolean-configuration reports, a missing premise for implicit return or the
end of main fans out into nine uncovered atoms; one official scoring path also
accepted an equivalent omission and is recorded as an evaluator false pass. In
length reports, agents use field types, usize subtraction, overflow behavior,
or the fact that a true branch skips its else branch without authority that
entails those exact propositions. In redesign reports, agents produce a sound
witness and useful API but omit the premise that an ordinary safe function call
imposes no unsafe caller obligation.

The recurring defect is a proof kernel with an unstated root, not lack of a
longer construct checklist. It motivates V5's distinction between artifact
facts and semantic propositions, proposition-level provenance and consumer
tracking, implication-direction checks, valid-use certificates, root-blocker
fan-out, and mandatory disclosure of proofs reconstructed during review.

Also harden later evaluations: score direct decisions separately from
dependency fan-out, include metamorphic holdouts that vary syntax while
preserving semantics, canonicalize retry and output handling, materialize gates
mechanically, and define a finite terminal confirmation sequence rather than an
open-ended search for ever more fixtures.


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Reviewed commit: 2a5da41cb2

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Comment on lines +13 to +14
scores. The static manifests, byte-tree identities, packets, attempt
preservation, event chain, reveal, and aggregate validate.

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P2 Badge Do not claim attempt preservation validates

The preserved artifacts do not currently pass the repository's own integrity check: running python3 protocol.py verify-static in this run raises ValueError: preserved attempt changed: r021/1, and direct comparison also finds mismatched event digests for failed attempts r023/1 and r047/1. Either repair those records or disclose the integrity limitation; otherwise this status section incorrectly assures readers that the evidence chain validates.

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Comment on lines +126 to +128
V4 reports `E` (`r019`) and `F` (`r007`) reasoned from non-emptiness to a valid
last index but did not close the Rust premises for `len`'s return type, the
`usize` value domain, built-in subtraction, and overflow/profile behavior.

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P2 Badge Do not attribute the len-type omission to report F

Report F did close the len return-type premise: its AX-LEN entry explicitly states that bytes.len() returns the element count as usize, and the frozen adjudication passes L3 on exactly that basis (scoring/adjudications/L.json). Its actual missing numeric leaves were the usize domain, subtraction, and overflow/profile semantics. Grouping it with E as also missing the return type makes this root-cause analysis inconsistent with the preserved adjudication and should be narrowed accordingly.

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Comment on lines +212 to +213
- resolve the observed `P` rubric ambiguities about overlapping authority
defects and whether a TCB qualification may be inherited implicitly;

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P2 Badge Resolve the recorded L rubric ambiguities too

The frozen L adjudication records three unresolved rubric ambiguities that directly affect scoring: whether an opposite-direction quotation also fails L2/L6, when such an extraction gap triggers LH4/G11, and whether F's alternative positivity derivation satisfies L3. Isolated certificate tests do not define those decision rules, so singling out only the P ambiguities leaves the next evaluation able to reproduce the same inconsistent L scoring; add explicit resolutions for the recorded L cases before collection.

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@joshlf
joshlf force-pushed the G4gcidwygjqjb3gwg5fcikcvz4chrkvix branch from 87fec8c to f2447d9 Compare August 29, 2026 10:42
@joshlf
joshlf force-pushed the Gquwn2yzvxejg4lkqiqoaaowxzxbmj62x branch from 2a5da41 to a94d5db Compare August 29, 2026 10:42
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codecov-commenter commented Aug 29, 2026

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Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 91.85%. Comparing base (214cf94) to head (3e392c9).

Additional details and impacted files
@@                        Coverage Diff                         @@
##           G4gcidwygjqjb3gwg5fcikcvz4chrkvix    #3535   +/-   ##
==================================================================
  Coverage                              91.85%   91.85%           
==================================================================
  Files                                     20       20           
  Lines                                   6093     6093           
==================================================================
  Hits                                    5597     5597           
  Misses                                   496      496           

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📢 Have feedback on the report? Share it here.

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Trace V4's scored misses to missing semantic premises while preserving the
official failed result. The reports commonly identify the right risk and even
the right witness, but close the proof with an uncited reading of syntax.

In Boolean-configuration reports, a missing premise for implicit return or the
end of main fans out into nine uncovered atoms; one official scoring path also
accepted an equivalent omission and is recorded as an evaluator false pass. In
length reports, agents use field types, usize subtraction, overflow behavior,
or the fact that a true branch skips its else branch without authority that
entails those exact propositions. In redesign reports, agents produce a sound
witness and useful API but omit the premise that an ordinary safe function call
imposes no unsafe caller obligation.

The recurring defect is a proof kernel with an unstated root, not lack of a
longer construct checklist. It motivates V5's distinction between artifact
facts and semantic propositions, proposition-level provenance and consumer
tracking, implication-direction checks, valid-use certificates, root-blocker
fan-out, and mandatory disclosure of proofs reconstructed during review.

Also harden later evaluations: score direct decisions separately from
dependency fan-out, include metamorphic holdouts that vary syntax while
preserving semantics, canonicalize retry and output handling, materialize gates
mechanically, and define a finite terminal confirmation sequence rather than an
open-ended search for ever more fixtures.

gherrit-pr-id: Gquwn2yzvxejg4lkqiqoaaowxzxbmj62x
@joshlf
joshlf force-pushed the Gquwn2yzvxejg4lkqiqoaaowxzxbmj62x branch from a94d5db to 3e392c9 Compare August 29, 2026 11:11
@joshlf
joshlf force-pushed the G4gcidwygjqjb3gwg5fcikcvz4chrkvix branch from f2447d9 to 214cf94 Compare August 29, 2026 11:11
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