mission-slice-sop

Use when working a mission or slice — the full SDLC flow (intent → mini-requirements + proof contract → mockups → plan-lock → build → QA visual compare → rig proof drops → proof-lock) plus how to track, prove, hand off, and carry state across agents and compaction via the canonical files (PROGRESS.md / PROOF.md / MISSION_NOTES.md / MISSION_BRIEF.md / README.md / IMPLEMENTATION-PRD.md). Covers the convention sections the Living Notes UI projects, the two locks, the three role contracts, per-file WHO/WHEN/HOW rules, the four-legs lifecycle, hot-potato queue handoffs, the moment-of-truth checklist, the deterministic rig scope audit backstop, and the ghost-text capture gotcha.