Write Plan: Spec Into Implementation Plan Turn a spec into a comprehensive implementation plan that an engineer (or a downstream agent) can execute task-by-task without re-deriving intent. The output is a single markdown plan document at , sitting beside the spec in the same concept folder. The plan captures HOW — file structure, task decomposition, exact code, exact commands — while the spec already owns WHAT and WHY. <hard gate Do NOT start writing the plan until a brainstorm-beagle spec exists at . If one is missing, stop and route the user to first. Skipping the spec produces plans that b…