Eve Plan Implementation

This breaks down software engineering plans into parallelized Eve jobs with proper orchestration and gating. The root epic delegates to phase jobs, which spawn atomic task workers that run independently. It pushes context into child job descriptions since workers can't see parent state, which keeps orchestrators lightweight and avoids redundant analysis. The workflow mirrors bead's epic-phase-task hierarchy but uses Eve's dependency system and review gates. Use it when you have a plan document and want orchestrated execution instead of sequential implementation. The waiting signal pattern after spawning children is smart: orchestrators yield resources while parallel work happens downstream.