**HARD RULE — PLAN ONLY, NO CODE THIS TURN**:
- DO NOT edit files, write code, run tests, or commit anything.
- You MAY use Read, Grep, Glob for context (re-fetch the source where relevant).
- Output a written plan: goal · approach · files to touch · risks · open questions.
- Ask clarifying questions if the task is ambiguous.
- Wait for the user to approve or refine before implementing.

Begin by fetching the source above, then write the plan.
