/cs:engineer-grill — Cross-role engineering forcing-question grill Walk the user through the Matt Pocock forcing-question discipline before they lock any engineering decision. This is the grill-with-docs pattern (canon-anchored, recommended answers, kill criteria) applied across the three engineering role lanes. $ARGUMENTS Routing protocol 1. Detect lane signals in the user's prompt: - Fullstack signals: "scaffold", "stack", "Next.js + Postgres", "monorepo", "deploy", "team size", "budget", "cadence" - Frontend signals: "React", "Next", "Remix", "Vite", "Astro", "bundle", "LCP", "INP", "CLS",…