[BernardLowe]

Summary

• What changed: KZG and IPA now map nil and zero-length Cells directly to scalar zero. Nonempty cells retain their existing SHA-256 mappings. Current conformance vectors and encoding specifications are updated in place, with regression coverage for empty and sparse vectors, boundary slots, prepared/single/batch openings, independent verifiers, replacements, and the optional KZG opening-computer path.
• Why: Hashing empty Cells made semantically sparse fixed-width vectors cryptographically dense, preventing the commitment implementations from skipping zero scalars.

Testing

• GOWORK=off go test -p=6 -parallel=6 ./...
• GOWORK=off go vet -p=6 ./...
• GOWORK=off go build -buildvcs=false -p=6 ./...
• Targeted KZG/IPA tests, current conformance regeneration and validation, gofmt, and git diff --check.
• Independent GPT-6 Astra (max) review: no actionable findings; five targeted tests independently rerun successfully.
• Remote occupancy smoke against evaluator c4178a80ae1e50593c9ac48ff248380339ddfe62 on codex/benchmark-slot-occupancy, explicitly bound to Core cdfb12c6746d16a5ef197c3f2d2e8bfa0a380e9e through a separate Go workspace. All 66 KZG/IPA × 0–100% occupancy × commit/prove/verify cases passed with -benchtime=1x -count=1 -cpu=1, under a one-CPU scope and affinity limit. This is a correctness smoke, not a performance result.

Notes

• This intentionally replaces the current pre-beta empty-cell encoding without a compatibility reader, profile/version bump, or release, as requested by the maintainer. Existing release tags and historical results remain unchanged.
• Implemented by GPT-5.6 Luna (max), reviewed by GPT-6 Astra (max). Local full-module validation used six-CPU affinity, reduced process priority, and bounded Go concurrency. Actual GPU hardware execution was not exercised.
• The evaluator dependency pin and integration Git links are unchanged. The remote source-validation workspace is /home/ubuntu/malt/worktrees/zero-empty-cell-occupancy/go.work; provenance and smoke output are retained beside it.

[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	🔄 Running since 2026-10-24T07:38:13.960211Z	cdfb12c	Draft marked ready

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.

[Copilot]

Copilot was unable to review this pull request because the user who requested the review has insufficient remaining quota.