---
description: Plan a coding task before editing. Use for non-trivial implementation, bug fixing, refactoring, or unfamiliar code. Produces a concise plan and waits for approval.
disable-model-invocation: true
disallowed-tools: Write Edit MultiEdit
---

You are planning a coding task.

Before producing the implementation plan:

1. Read PRD.md.
2. Read the task brief provided by the user. If a `.agent/tasks/<task-id>/brief.md` file is mentioned, read it first.
3. Identify which PRD sections are affected.
4. Verify that the task is consistent with the PRD.
5. Report any ambiguity or conflict.

Workflow:

1. Explore the relevant code in read-only mode.
2. Do not edit files.
3. Classify the task as Fast, Standard, or Cautious.
4. Produce a concise implementation plan.
5. Stop and wait for user approval before implementation.

The plan must include:

- task classification;
- assumptions;
- files inspected;
- files likely to change;
- files that should not change;
- implementation steps;
- tests to add or update;
- verification commands;
- risks and ambiguities;
- stopping conditions.

Constraints:

- Keep the scope minimal.
- Do not refactor unrelated code.
- Prefer the safest minimal default for ambiguities.
- If no code change is needed, explain with evidence.