What problem does it solve? Turning a rough product idea into a clear, honest, right-sized product brief is hard: assumptions go unexamined, scope balloons, and drafts lose context between sessions. This Skill coaches you through producing, refining, or pressure-testing a brief while keeping a persistent audit trail of every decision. ## Core Features & Use Cases - Three intent modes: Create a new brief from scratch, Update an existing brief against a change signal, or Validate a brief with honest, line-cited critique. - Conversational discovery with coaching: Brain-dump friendly intake, web-research subagents for landscape grounding, and a choice between a Fast path (batched questions with [ASSUMPTION] tags) and a Coaching path (section-by-section pushback). - Persistent workspace and memlog: Each run writes brief.md, an optional addendum.md, and an append-only .memlog.md decision log, so work resumes cleanly across sessions. - Use Case: A founder preparing an investor pitch activates the skill, dumps their notes and a prior memo, chooses the fast path, and receives a polished 1-2 page brief with assumptions flagged for review. ## Quick Start Ask the assistant to help you create a product brief for your new app idea and answer its discovery questions.