project-planning

name	project-planning
description	Create clear, step-by-step implementation plans with acceptance criteria. EXCLUSIVE to planner agent.
allowed-tools	Read, Grep, Glob, Bash

Project Planning

Exclusive to: planner agent

Instructions

1. Restate Goal

One sentence summary of what we're building.

2. Research

• Search codebase for similar patterns
• Identify affected files
• Note dependencies

3. Break Down

Create 3-5 phases, each independently testable.

Estimation Techniques

T-Shirt Sizing

Size	Hours	Complexity
XS	1-2	Single file
S	2-4	Few files
M	4-8	Multiple files
L	1-2 days	Multiple components
XL	3-5 days	Full feature

Risk Multipliers

• Database migration: 1.5x
• Auth/security: 1.5x
• Third-party: 2x

Risk Matrix

Level	Criteria	Mitigation
🔴 High	Data loss, security, breaking	Rollback plan, staging
🟡 Medium	Performance, UX regression	Feature flag
🟢 Low	Cosmetic, refactor	Standard testing

Phase Template

# Phase N: [Name]

## Objective
[What this accomplishes]

## Tasks
- [ ] Task with file path

## Files
| File | Action |
|------|--------|
| `path/file` | Create/Modify |

## Verification
```bash
[commands]

Estimate

[X hours]

## plan.md Output (REQUIRED)

Always create a consolidated `plan.md` file that contains ALL phases and context:

```markdown
# Plan: [Feature Name]

## Context
[What we're building and why]

## Code Patterns to Follow
[Key patterns from codebase research]

## Phases
| # | Name | Objective | Est. |
|---|------|-----------|------|

---

## Phase 1: [Name]
### Objective
[Goal]

### Tasks
- [ ] Task with `path/to/file`

### Files
| File | Action |
|------|--------|

---

[... repeat for each phase ...]

---

## Summary
- **Total Phases**: N
- **Estimated Effort**: X hours
- **Key Risks**: [list]

Examples

• "Plan a new settings page"
• "Create a migration plan for adding a column safely"