Refactor Cleanup Workflow

Use when the active route selects this skill or its topic applies.

Read references/current-guidance.md for applicable decision rules, stop conditions and verification before acting. Open related cards only for in-scope work, starting with their SKILL.md. Use this canonical bundle, not legacy flat paths.

When changing routing, confirm it selects this entrypoint. When changing guidance, validate the reference's links and frontmatter.