Constant STATIC_ROUTING_CODEGRAPH 

pub const STATIC_ROUTING_CODEGRAPH: &str = "- For repository-local navigation, use `explore` for symbols, call paths, implementation, and tests.\n- For cross-repository questions, use Code System Graph to find entities, relationships, contracts, change impact, and pull-request overlap; use `explore` to verify local source details.\n";

Static routing policy when CodeGraph enrichment is enabled.