[joshlf]

Move the actual CastUnsized layout decision into a pure helper consumed
by the associated constant. Prove sized equality and accepted DST
alignment, physical offset, and complete size sequences. Check an
independent Rust sizing harness, including overflow and zero-sized tails.
These are conditional numerical guarantees, not pointer-validity proofs.

Validation: pinned extraction; independent golden/live proofs,
required-contract checks and axiom audits; targeted Rust tests.

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

---

• 　  Prove record construction against independent Rust references #3744
• 　  Prove cast metadata composition against reference sizes #3777
• 　  Prove numerical cast plan selection and metadata conversion #3776
• 　  Prove cast validation and exact metadata inference #3755
• 　  Prove allocation size preparation and tail containment #3790
• 👉 Prove the concrete CastUnsized layout gate #3789
• 　  Prove split lengths and non-overlapping numerical regions #3788
• 　  Prove byte advancement and padding sequence queries #3754
• 　  Prove normalized layout padding and field extension #3753
• 　  Prove concrete pointer metadata operations #3787
• 　  Prove exact trailing sizes, padding and capacity #3752
• 　  Prove primitive layout constructors with recursive mathematical models #3751
• 　  Compare nested DST sizes with a recursive Rust oracle #3749
• 　  Model alignment and phase encoding as a bounded mathematical pair #3747
• 　  Refine recursive record semantics into normalized layouts #3743
• 　  Prove trailing-layout normalization and capacity arithmetic #3742
• 　  Reuse Aeneas specifications for views and indexed loops #3745
• 　  Strengthen arithmetic specifications and prove arithmetic corollaries #3746
• 　  Check native total and partial Aeneas specifications #3739
• 　  Prove unsigned byte-order reads, writes and updates #3800
• 　  Verify doc-owned specifications over recursive mathematical models #3738
• 　  Separate numerical cast planning from typed pointer projection #3774
• 　  Move pointer cast implementation into its own source file #3773
• 　  Share Rust mathematical models across Anneal frontends #3799

Latest Update: v4 — Compare vs v3

📚 Full Patch History

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

Version	v3	v2	v1	Base
v4	vs v3	vs v2	vs v1	vs Base
v3		vs v2	vs v1	vs Base
v2			vs v1	vs Base
v1				vs Base

⬇️ Download this PR

Branch

git fetch origin refs/heads/G2cbw3wr4c5plt3vf5yzd54trtag3zhkh && git checkout -b pr-G2cbw3wr4c5plt3vf5yzd54trtag3zhkh FETCH_HEAD

Checkout

git fetch origin refs/heads/G2cbw3wr4c5plt3vf5yzd54trtag3zhkh && git checkout FETCH_HEAD

Cherry Pick

git fetch origin refs/heads/G2cbw3wr4c5plt3vf5yzd54trtag3zhkh && git cherry-pick FETCH_HEAD

Pull

git pull origin refs/heads/G2cbw3wr4c5plt3vf5yzd54trtag3zhkh

Stacked PRs enabled by GHerrit.

[chatgpt-codex-connector]

Codex Review Summary

This comment shows the latest Codex review activity on this pull request.

Review	Status	Commit	Review trigger
📝 Code Review	✅ Completed 2026-10-06T00:34:47.170033Z	d12c09b	PR opened
🔒 Security Review	✅ Completed 2026-10-06T00:35:09.969795Z	d12c09b	PR opened

ℹ️ About Codex in GitHub

Your team has set up Codex to review pull requests in this repo. Reviews are triggered when you

• Open a pull request for review
• Mark a draft as ready
• Comment "@codex review" or "@codex security review".

Codex reacts with 👀 while any review is running, comments if it has suggestions, and reacts with 👍 once all reviews finish with no findings.

[codecov-commenter]

Codecov Report

❌ Patch coverage is 0% with 47 lines in your changes missing coverage. Please review.
✅ Project coverage is 53.72%. Comparing base (230122f) to head (22d6286).

Files with missing lines	Patch %	Lines
zerocopy/src/pointer/mod.rs	0.00%	47 Missing ⚠️

Additional details and impacted files

@@                          Coverage Diff                          @@
##           Gii2clttpvhasvgyirv6rn3tj4ushk3hd    #3789      +/-   ##
=====================================================================
- Coverage                              54.32%   53.72%   -0.60%     
=====================================================================
  Files                                     26       26              
  Lines                                   4210     4257      +47     
=====================================================================
  Hits                                    2287     2287              
- Misses                                  1923     1970      +47     

☔ View full report in Codecov by Harness.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.