Search Tool Hierarchy When searching code, use this decision tree: Decision Tree Tool Comparison Tool Best For Requires LEANN Semantic search: "how does caching work", "error handling patterns", conceptual queries Index built AST grep Structural patterns: "find all calls to foo() ", refactoring, find usages by type MCP server Morph Fast text search: "find files mentioning error", grep across codebase API key Grep Literal patterns, class/function names, regex Nothing (built in) Examples LEANN (semantic/conceptual): "how does authentication work" "find error handling patterns" "where is rate limiting implemented" AST grep (structural): "Find all functions that return a Promise" "Find all React components using useState" "Refactor all imports of X to Y" Morph (text search): "Find all files mentioning 'authentication'" "Search for TODO comments" Grep (literal): class ProviderAdapter def init Regex patterns LEANN Commands

search-tools