What problem does it solve? Plans often hide unexamined assumptions, fuzzy terminology, and contradictions with existing code or documented decisions. This Skill runs a relentless grilling session that maps a plan as a design tree and challenges every decision against the project's domain model before any code is written. ## Core Features & Use Cases - Frontier-based interview rounds: Computes the set of decisions answerable now and asks them as one numbered round, never asking a question whose answer depends on another open question. - Inline documentation updates: Resolves terminology into .red/CONTEXT.md glossaries the moment a term is settled, and offers ADRs only when a decision is hard to reverse, surprising, and a real trade-off. - External reference ingestion: Fetches URLs, PDFs, and files through a wiki cache with single-line receipts, and lands changed docs through a worktree-based PR finalizer at session end. - Use Case: Before starting a billing feature, paste your plan and let the session expose that your code cancels entire Orders while your plan assumes partial cancellation, then record the resolved terms and an ADR. ## Quick Start Ask the AI to grill your plan by invoking the start skill with a pasted plan, URL, or file path as the argument.