staged-rollout

Use when a build is too big for one session and must be run as many small, resumable sessions — a staged or milestone rollout with cross-session progress tracking, a persistent plan that must not drift, and stop/resume freely over hours or days. Covers decomposing a large project into a .plan/ folder of dependency-ordered stages with an evidence ledger, and executing one stage per fresh session. NOT for single-session tasks, quick fixes, or work of roughly three sessions or less — the scaffold has a floor cost that only pays off on genuinely large, decomposable builds.