Serena

Serena is a powerful coding toolkit that equips coding agents such as Claude Code with IDE-like capabilities for semantic code retrieval and editing. By operating at the symbol level and understanding the relational structure of code, Serena greatly improves token efficiency. Instead of reading entire files or relying on crude string replacements, coding agents can use precise Serena tools such as find_symbol, find_referencing_symbols and insert_after_symbol to locate and edit code. Although the impact is minimal on small projects, this efficiency is extremely valuable as the codebase grows.