**AUTO-TRIGGER when:**- Progress reaches 5% milestone (5%, 10%, 15%, 20%...)- User says "sync [module] to main"- User says "approve main sync"- User says "reconcile [module] with main"Manages two-phase sync from yolo to main: (1) WIP markers to prevent contributor conflicts, (2) code sync with CI reconciliation after production validation.Use proactively without asking permission when task matches skill purpose.