Agent Skills: progressive-research

Broad-to-narrow research Orchestration - start with a wide census, harden the scope from returned Evidence, and specialize Subagents only once the exact situation is proven. TRIGGER when the Architect says "progressive research", "start broad", or when dispatching research or debugging Subagents into a situation whose cause or shape is unknown. DO NOT TRIGGER when the exact scope is already proven - dispatch the specialized Subagent per /subagents directly.