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 the founder's head, and drafts drift out of sync with decisions. This Skill coaches users through creating, updating, or validating a product brief so the result reflects their 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. - Conversational discovery with coaching: Brain-dump friendly discovery, 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 with audit trail: Briefs land in a run folder with YAML frontmatter, an append-only .memlog.md decision log, and an addendum.md for depth that belongs downstream. - Headless and resumable operation: Supports non-interactive runs with JSON status output and resume of prior in-progress drafts. - Use Case: A product manager with a pitch tomorrow invokes the skill, brain-dumps the idea, picks 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 product idea and answer its discovery questions.