Platform Tooling

• Use AskUserQuestion for blocking user choices or confirmations.
• Use WebFetch/WebSearch for current external docs or public web research.
• Use Task tool with subagent_type for delegation.
• Use Skill tool when chaining to another installed skill.

PRD Pipeline (Per-Feature)

Three phases — decompose → per-feature PRD → cross-feature review. Consumes plans/{slug}/idea-brief.md, emits plans/{slug}/prd/ with one PRD per feature, a Mermaid navigation graph, and a master INDEX.

When to Use