Uses ROADMAP.md phase discovery and Skill() flat invocations for each phase command. After all phases complete: milestone audit → complete → cleanup.
Creates/Updates:
.planning/STATE.md— updated after each phase.planning/ROADMAP.md— progress updated after each phase- Phase artifacts — CONTEXT.md, PLANs, SUMMARYs per phase
After: Milestone is complete and cleaned up.
Project context, phase list, and state are resolved inside the workflow using init commands (gsd-sdk query init.milestone-op, gsd-sdk query roadmap.analyze). No upfront context loading needed.