pumpd-decompose

Turn an APPROVED PUMPD plan into Linear for HANDS-OFF Cyrus execution. Creates the Linear Project (the "epic"), attaches the PRD as a Linear Document, and creates ONE orchestrator parent issue (labeled orchestrator + graphite + pumpd-agent) whose body carries the approved decomposition. You delegate that parent ONCE; Cyrus self-creates the stacked sub-issues and builds the PR stack overnight (auto-Done cascade). Use after /pumpd-plan once the plan passed /pumpd-review. Hard-to-undo — gate on approval first.