GSD（Get Shit Done）工作流文档

<objective> Archive phase directories from completed milestones into .planning/milestones/v\{X.Y\}-phases/.

Use when .planning/phases/ has accumulated directories from past milestones. </objective>

<execution_context> @~/.claude/get-shit-done/workflows/cleanup.md </execution_context>

<process> Execute end-to-end. Identify completed milestones, show a dry-run summary, and archive on confirmation. </process>