Use when starting any conversation - establishes how to locate and invoke skills, mandating Skill tool usage before ANY response including clarifying questions
Use when building ANY website, web app, landing page, or web-based UI - searches real template marketplaces for professionally designed layouts in the user's industry or niche, then extracts layout structure, color palettes, typography choices, and section sequences as the design blueprint instead of generating from assumptions
Use when about to build any feature, library, or system - searches GitHub and package registries for existing implementations to study, harvest patterns from, or use directly instead of building from scratch
Use when starting any creative work - creating features, building components, adding functionality, or modifying behavior. Explores user intent, requirements, and design before implementation.
Use when making technology, hosting, or infrastructure decisions — recommends services, databases, and deployment strategies based on project requirements and what the user actually has available
Use when starting a session, running shell commands, installing packages, or diagnosing platform-specific failures - detects OS, shell, runtime, package manager, and toolchain before any command execution
Use when a task benefits from multiple Claude instances collaborating with peer-to-peer messaging - parallel research, multi-module features, cross-layer changes, or competing hypothesis debugging. Not for simple independent tasks (use parallel-execution) or sequential tasks (use delegated-execution).
Use when repeated fix attempts fail, the agent appears stuck in a loop, or complexity is increasing without progress