docs(devlog): record Claude contract hardening and PR carries

[lidge-jun]

Summary

Records the outcome of the post-2.70.0 loop and closes its unit (devlog/_plan/260929_dev_next_hardening_carry/ moves to devlog/_fin/): Claude request-contract hardening #6217, luvs01's #6194, #6195 and #6193, and the #6089 carry #6218, with the verification run on the resulting dev head and the PRs held for an owner decision.

Verification

• bun run privacy:scan: pass.
• Docs only; no build, typecheck or test path reads devlog/.

Checklist

• Scope stays focused and avoids unrelated cleanup.
• Docs or release notes were updated when needed.
• Security-sensitive changes were reviewed for secrets, auth, and unsafe defaults.

[github-actions]

✅ Deterministic PR hygiene checks passed.

[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 2026-09-28T23:50:38.658359Z	7682ceb	PR opened

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