Tasks

• Red: prompt-marker and top region tests; implement.
• Red: Codex fixtures; port codex.toml.
• ADR-0027, docs/07.
• Mutation-check; scripts/verify.sh fast.
• Independent Standards and Spec reviews (Codex agents; Claude review hit its API limit); no blocking findings, add development handoff.
• scripts/verify.sh full (2026-10-09, full-4wp45w09).
• Publish, link and merge on exact-head CI.