Use when the user EXPLICITLY asks to design or evaluate a system architecture — "design this system", "architecture for X", "how should this be structured", "is this approach sound at scale", "review this design". An enterprise architecture design flow: battle-tested (production-proven) patterns + a Clean Architecture lens + brutal, anti-sycophantic honesty, ending in an evidence-backed design proposal (it designs and evaluates; it does NOT write code). NOT for: authoring the step-by-step implementation plan (use `/swe-skills:write-plans`), implementing/refactoring code, or bug fixing; do not auto-invoke — this is a heavy, user-invoked orchestration flow.
