Overall Assessment

✅ Looks good — no unmitigated P0 or P1 findings.

Executive Summary

• The diff is metadata-only: it bumps the package/crate/docs version to 2.7.3 and adds the 2.7.3 changelog section in diff_diff/init.py:L182, pyproject.toml:L7, rust/Cargo.toml:L3, docs/llms-full.txt:L5, and CHANGELOG.md:L10-L17.
• Methodology review found no affected estimators or inference paths. Cross-checking against docs/methodology/REGISTRY.md:L1-L40, nothing in this PR changes estimator math, weighting, SE/variance logic, assumptions, or defaults.
• The version bump is internally consistent across the Python package, Rust crate, and docs-facing metadata, and docs still derive release/version from diff_diff.__version__ in docs/conf.py:L19-L20.
• No tests were added or run. Given the PR scope, I do not treat that as a defect.

Methodology

No findings. Affected methods: none. The touched files are release metadata and changelog text only, not estimator implementations or method-specific docstrings. I reviewed the registry at docs/methodology/REGISTRY.md:L1-L40 and found no methodology-bearing changes in scope.

Code Quality

No findings. The version string is synchronized across the main package, build metadata, Rust crate, and LLM-facing docs in diff_diff/init.py:L182, pyproject.toml:L7, rust/Cargo.toml:L3, and docs/llms-full.txt:L5.

Performance

No findings. No runtime code paths, numerical kernels, or build-time performance logic were changed in the reviewed diff.

Maintainability

No findings. The changelog update follows the existing file structure, including the new compare link at CHANGELOG.md:L926-L927.

Tech Debt

No findings. I checked the deferred-work tracker at TODO.md:L38-L55 and did not identify any new debt introduced by this metadata-only PR.

Security

No findings. The reviewed changes are limited to version strings and release-note text; they do not introduce secrets, credential material, or security-sensitive code changes.

Documentation/Tests

No findings. The user-facing version text and changelog entry were updated consistently in docs/llms-full.txt:L5 and CHANGELOG.md:L10-L17. No tests changed, which is acceptable for this scope. Residual risk is low, but this was a static review and I did not run packaging or docs-build validation.