McXiao1

Create, resume, and maintain durable on-disk plans for engineering tasks. Use when the user asks to: (1) execute a long-running or multi-session task, (2) handle a complex task with multiple phases, dependencies, files, or systems, (3) complete a goal-driven task with a concrete deliverable and acceptance criteria, or (4) resume or continue an interrupted, paused, or previously planned task, including unfinished delegated sub-agent work. Do not use for read-only analysis, code review, or quick localized fixes unless the user explicitly asks for a durable plan.