Overall assessment: ✅ Looks good

Executive summary

• Version bumps are consistent across diff_diff/__init__.py, pyproject.toml, and rust/Cargo.toml. (diff_diff/__init__.py:L171, pyproject.toml:L6, rust/Cargo.toml:L1)
• New CHANGELOG.md entry is well‑structured and dated for 2.6.1. (CHANGELOG.md:L7)
• Minor release‑notes accuracy risk: entry lists methodological fixes without code changes in this PR; ensure those fixes are already included in the 2.6.0→2.6.1 range. (CHANGELOG.md:L15-L26)

Methodology

• Severity: P3. Impact: Changelog states ContinuousDiD SE and methodology doc fixes, but this PR contains no code/doc changes beyond the changelog, so release notes could be misleading if those fixes are not actually in the 2.6.0→2.6.1 commit range. Concrete fix: Verify those fixes are already merged in the release range or adjust the changelog wording to match what’s actually included. (CHANGELOG.md:L19-L25)

Code Quality

• Severity: N/A. Impact: No code changes affecting behavior. Concrete fix: None. (diff_diff/__init__.py:L171)

Performance

• Severity: N/A. Impact: No performance‑relevant changes. Concrete fix: None. (diff_diff/__init__.py:L171)

Maintainability

• Severity: N/A. Impact: No maintainability‑relevant changes beyond version bumps. Concrete fix: None. (pyproject.toml:L6)

Tech Debt

• Severity: N/A. Impact: No tech‑debt changes. Concrete fix: None. (rust/Cargo.toml:L1)

Security

• Severity: N/A. Impact: No secrets or security‑relevant changes. Concrete fix: None. (CHANGELOG.md:L7)

Documentation/Tests

• Severity: P3. Impact: Release notes include several doc and methodology claims; if any are not in the included commit range, users may be misled. Concrete fix: Confirm each bullet corresponds to merged changes, or mark the entry as “planned” instead of “fixed.” (CHANGELOG.md:L13-L26)

Next steps

1. Confirm the 2.6.0→2.6.1 range includes the listed fixes; adjust CHANGELOG.md if any are missing.