project-promote
Cheap keys: current play_level in .speck/project.json and target level (Sprint→Build or Build→Platform).
- MUST Read
references/spine.md(read current state; confirm target). - If Sprint→Build: MUST Read
references/transitions/sprint-to-build.md. Do not Read build-to-platform. - If Build→Platform: MUST Read
references/transitions/build-to-platform.md. Do not Read sprint-to-build. - Update
.speck/project.json; resume the canonical project flow for the new level.