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 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 honest, line-cited critique. - Discovery coaching: Conversational brain-dump facilitation with web-research subagents, pushback on thin assumptions, and a choice between a fast path (assumption-tagged draft) or a coaching path (section-by-section). - 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 an investor pitch tomorrow and a scattered set of notes. Invoke the skill, dump your context, choose the fast path, and receive a polished 1-2 page brief with flagged assumptions to review. ## Quick Start Ask the assistant to help you create a product brief for your product idea and answer its discovery questions.