quality-gated-six-phase overview

Six-phase quality-gated development methodology: design → planning → implementation (subagent-TDD) → verification → debugging → finishing. Distilled from joe-habu/superbabysitter@531a39c1. Each phase is exported individually so downstream processes can compose them piecemeal. The unified end-to-end process lives in library/contrib/joe-habu/superbabysitter/quality-gated-development.js. Every phase task is fronted by a `ctx.breakpoint()` gate with a canonical breakpointId so users can auto-approve via rules. Reviewer/fixer loops inside the implementation phase use the robust-rejection escalation primitive `nStrikesEscalation`.