Everything from Days 1-4 becomes input. Claude assembles; you edit the judgment calls: goals, non-goals, edge cases, risks, open questions.
PRD assembler
Assemble a PRD from these inputs: brief [paste], stories [paste], competitor table [paste], feedback synthesis [paste]. Sections: Goals, Non-goals, User stories, Edge cases, Risks, Metrics, Open questions. Flag any section where my inputs are too thin and say what's missing.