Record September milestone session handoff

[Chris0Jeky]

The session checkpoint was spread across PR comments and a local ledger. This handoff saves merged slices, exact open PR heads, verification boundaries, finite review budgets, remaining maintainer gates, and the incomplete palette preparation in one committed record.

Refs #2235. No milestone completion, release approval, or new product change is claimed. The user requested wrap-up and saving work; remaining PRs stay open.

Validation: doc links (664 Markdown files, zero broken relative links), docs governance, GitHub operations governance, and diff hygiene 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 2026-09-08T00:44:30.485089Z	22d07ac	PR opened

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[Chris0Jeky]

Independent Terra review, round 1 — no confirmed C/H finding at head 22d07acc3e441cae55464a62d5488458a154e1dc (base/merge-base db102dcba25cc5f347f22b38ce13d00502948ed9). The handoff clearly treats PR and CI state as time-stamped and requires a live refresh; it preserves #2790's parked ceiling and ADR-0066 maintainer-review constraint. node scripts/check-doc-links.mjs passed (664 Markdown docs, 0 broken relative links). No change required.