Deep Research Autonomous multi-agent research system. Dispatches parallel sub-agents, stores findings to files, synthesizes into briefs or reports. Core principle: Planning → Parallel research agents → File-based findings → Synthesis = high quality research with minimal context usage. When to Use Use for: Technical research, domain knowledge, market analysis, architectural patterns, comparing approaches, learning complex topics Don't use for: Single fact lookups, specific URL fetches, questions answerable in one search The Process Quick Reference Phase 1: Planning (Query Analyzer Agent) Uses…