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Prove byte advancement and padding sequence queries - #3754

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Gzv73p3q2jm6ohnisvlbsd62wdsi6mjkufrom
G5ef3gjdnvnuoek33bzy6bovxsxprq4wm
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G5ef3gjdnvnuoek33bzy6bovxsxprq4wm

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@joshlf

@joshlf joshlf commented Oct 2, 2026 •

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Prove advancement and padding-query contracts for accepted representations. A
positive size-sequence comparison establishes equal sizes for every natural
metadata value; no converse is claimed for a negative result.

Add total Rust assertion harnesses for exact advancement outcomes and fields,
size offsets, wrapping padding, dynamic-padding classification, and checked
size equality after positive sequence answers. Preserve the existing stronger
unbounded size-sequence theorem.

Validation: fresh pinned extraction and complete-model golden comparison;
independent golden/live Lean builds, required-contract checks, and the
transitive axiom audit.

Agent-authored-by: AI agent acting on joshlf's behalf


Latest Update: v26 — Compare vs v25

📚 Full Patch History

Links show the diff between the row version and the column version.

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git fetch origin refs/heads/G5ef3gjdnvnuoek33bzy6bovxsxprq4wm && git checkout -b pr-G5ef3gjdnvnuoek33bzy6bovxsxprq4wm FETCH_HEAD

Checkout

git fetch origin refs/heads/G5ef3gjdnvnuoek33bzy6bovxsxprq4wm && git checkout FETCH_HEAD

Cherry Pick

git fetch origin refs/heads/G5ef3gjdnvnuoek33bzy6bovxsxprq4wm && git cherry-pick FETCH_HEAD

Pull

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Codex Review Summary

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Review Status Commit Review trigger
📝 Code Review ✅ Completed 2026-10-02T15:29:29.072135Z f014f78 PR opened
🔒 Security Review ✅ Completed 2026-10-02T15:30:54.802414Z f014f78 PR opened
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Codecov Report

❌ Patch coverage is 0% with 97 lines in your changes missing coverage. Please review.
✅ Project coverage is 54.97%. Comparing base (575ee20) to head (95066ac).

Files with missing lines Patch % Lines
zerocopy/src/layout/tail_transform_checks.rs 0.00% 97 Missing ⚠️
Additional details and impacted files
@@                          Coverage Diff                          @@
##           Gzv73p3q2jm6ohnisvlbsd62wdsi6mjku    #3754      +/-   ##
=====================================================================
- Coverage                              56.29%   54.97%   -1.32%     
=====================================================================
  Files                                     25       26       +1     
  Lines                                   4052     4149      +97     
=====================================================================
  Hits                                    2281     2281              
- Misses                                  1771     1868      +97     

☔ View full report in Codecov by Harness.
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  • ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.

@joshlf
joshlf force-pushed the G5ef3gjdnvnuoek33bzy6bovxsxprq4wm branch from f014f78 to c0e1417 Compare October 2, 2026 15:39
@joshlf
joshlf force-pushed the Gzv73p3q2jm6ohnisvlbsd62wdsi6mjku branch 2 times, most recently from 19976d2 to e9b1b2d Compare October 2, 2026 19:39
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joshlf force-pushed the G5ef3gjdnvnuoek33bzy6bovxsxprq4wm branch from c0e1417 to 7d2e3fc Compare October 2, 2026 19:39
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joshlf force-pushed the Gzv73p3q2jm6ohnisvlbsd62wdsi6mjku branch from 06080ee to 575ee20 Compare October 7, 2026 11:10
Prove advancement and padding-query contracts for accepted representations. A
positive size-sequence comparison establishes equal sizes for every natural
metadata value; no converse is claimed for a negative result.

Add total Rust assertion harnesses for exact advancement outcomes and fields,
size offsets, wrapping padding, dynamic-padding classification, and checked
size equality after positive sequence answers. Preserve the existing stronger
unbounded size-sequence theorem.

Validation: fresh pinned extraction and complete-model golden comparison;
independent golden/live Lean builds, required-contract checks, and the
transitive axiom audit.

gherrit-pr-id: G5ef3gjdnvnuoek33bzy6bovxsxprq4wm
Agent-authored-by: AI agent acting on joshlf's behalf
@joshlf
joshlf force-pushed the G5ef3gjdnvnuoek33bzy6bovxsxprq4wm branch from 95066ac to 75e86ca Compare October 13, 2026 16:33
@joshlf
joshlf force-pushed the Gzv73p3q2jm6ohnisvlbsd62wdsi6mjku branch from 575ee20 to 58e305d Compare October 13, 2026 16:33

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