Write Feature PRD

Write PRDs for features in an existing system. Start from what already exists; do not treat the codebase as greenfield.

Quick Start

1. Clarify the problem, users, and constraints.
2. Explore the repo to find the current flows, modules, and boundaries involved.
3. Inventory reusable code, existing skills, and deterministic tools before proposing new work.
4. Write the PRD with explicit reuse decisions, gaps, risks, and testing/rollout guidance.

Workflow

1. Frame the request