What problem does it solve? When working in a codebase, it is often unclear whether to query an existing CodeGraph index or fall back to plain text search with rg and file reads. This Skill provides a fast routing gate that decides which approach fits each request, avoiding wasted indexing work and noisy searches. ## Core Features & Use Cases - Index-First Routing: Checks whether CodeGraph MCP tools are visible and the project is indexed, then prefers indexed queries for symbols, callers, callees, imports, architecture, and impact analysis. - Fallback Rules: Routes to ordinary rg-based search when CodeGraph is unavailable, uninitialized, slow, or when the task is exact non-symbol text or a named-file edit. - Bilingual Trigger Support: Handles both English and Chinese requests such as 追调用链, 查引用, and 影响范围分析. - Use Case: A developer asks "who calls this function?" — the router announces Route: codegraph-aware and uses the callers tool; for "find this exact string", it routes to ordinary search instead. ## Quick Start Ask the assistant whether to use CodeGraph or ordinary search for tracing callers of a function in the current repository.