Use when working a mission or slice: the SDLC flow (intent -> mini-requirements + proof contract -> mockups -> plan-lock -> build -> QA -> `rig proof` drops -> proof-lock), and how to track, prove, and hand off state across agents and compaction via PROGRESS.md / PROOF.md / MISSION_NOTES.md. Covers
Use when working a mission or slice: the SDLC flow (intent -> mini-requirements + proof contract -> mockups -> plan-lock -> build -> QA -> `rig proof` drops -> proof-lock), and how to track, prove, and hand off state across agents and compaction via PROGRESS.md / PROOF.md / MISSION_NOTES.md. Covers the two locks, role contracts, hot-potato queue handoff, and the `rig scope audit` backstop.