Tip: Use Serena's Symbol-Level MCP Tools Instead of Grep for Repo-Wide Refactors

GitHub·medium signal

Serena (oraios/serena, ~26K stars) exposes language-server symbol operations over MCP, so a repo-wide rename is three tool calls — find_symbol to locate the definition, find_referencing_symbols to get true call sites from the LSP reference index, then rename_symbol to apply it everywhere. This is more reliable than grep/regex renames in large codebases because it uses the compiler's view of symbols, not text matches.