Semantic code retrieval and editing using Serena MCP server. Automatically provides IDE-like symbol-level code operations including find_symbol, find_referencing_symbols, insert_after_symbol, rename_symbol, and more. Use this skill when working with codebases that require: (1) Finding specific functions, classes, or symbols by name, (2) Finding all references to a symbol, (3) Making precise symbol-level code edits, (4) Navigating complex codebases efficiently, (5) Any semantic code operations beyond simple string replacement. This skill works with 30+ programming languages via LSP integration.