What problem does it solve? Turning a rough product idea into a clear, honest, right-sized product brief is hard — assumptions go unexamined, key context stays stuck in your head, and drafts either pad or miss what matters. This Skill coaches you through creating, updating, or validating a brief so the result reflects your own thinking. ## 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 an honest, line-cited critique. - Discovery coaching: Conversational brain-dump facilitation with web-research subagents, plus a choice between a Fast path (assumption-tagged draft) and a Coaching path (section-by-section pushback). - Persistent workspace: Writes brief.md, addendum.md, and a .decision-log.md audit trail to a run folder, with resume support across sessions and a headless JSON mode for automation. - Use Case: You have a pitch tomorrow — invoke the skill, dump your notes and a prior memo, choose the Fast path, and receive a polished 1-2 page brief with [ASSUMPTION] tags to review. ## Quick Start Ask the assistant to help you create a product brief for your new product idea and answer its discovery questions.