📐 P3X Architect — Pair-programming AI by default (Claude implements + Codex critiques, ~30-60s on small specs). Add --rup (CLI) or rup:true (MCP) to run the full multi-agent RUP design pipeline (vision, requirements, architecture, risks, acceptance, deploy → 11 roles, 1-3 min) when you actually need a design dossier. Scans your project root and either creates a new project (greenfield) or modifies existing code in place — matching your layout (src/, src-server/, client/server/, monorepo). Code lands at the project root; design artifacts under agents/slug/.