PRD Planner A PRD creation skill that uses persistent file-based planning to maintain coherent thinking and avoid "left-brain vs right-brain" context switching issues. When This Skill Activates This skill activates when you: - Explicitly say "PRD", "prd", "create a PRD", or "产品需求文档" - Say "product requirements document" or "产品需求" - Mention "write a PRD for..." - Say "PRD planning" or "PRD 设计" If user says "design solution" or "architecture design" without mentioning PRD, use instead. The Core Philosophy "PRD creation should be traceable, coherent, and persistent - not scattered across context…