Make the AI plan before it writes code

Before writing any code, plan this change and stop for my approval.

The change I want: <describe the feature or fix>
Where it lives: <project, relevant files or folders if you know them>
Constraints: <e.g. don't touch the database schema / keep the current design / must work on mobile>

Produce a plan, then STOP and wait:
1. Restate what I asked for in one sentence, and list anything ambiguous as a question.
2. Files you will create or modify, one line each: path, and what changes there.
3. Steps in order, each small enough to review in one go. For each step: what changes, how I'll see that it worked.
4. Anything that could break existing behaviour, and how you'll check it doesn't.
5. What you will NOT change, so I can catch scope creep.
6. Tests or manual checks I should run at the end.

Rules: do not write code in this reply. If the plan needs more than 6 files for what I described, propose a simpler design and say why. After I approve, implement ONE step at a time and pause after each.