/brainstorm — Clarify Goals Before Planning

Purpose: Separate WHAT from HOW. Explore the problem space before committing to a solution.

Four phases:

1. Assess clarity — Is the goal specific enough?
2. Understand idea — What problem, who benefits, what exists?
3. Explore approaches — Generate options, compare tradeoffs, adversarial critique
4. Capture design — Write structured output for /plan

Quick Start

/brainstorm "add user authentication"     # full 4-phase process
/brainstorm                                # prompts for goal