One Open Source Project a Day (No. 71): CodeGraph — Pre-Index Your Codebase for AI Agents, Save 35% Cost and 70% Tool Calls

Introduction "~35% cheaper · ~70% fewer tool calls · 100% local" This is the No.71 article in the "One Open Source Project a Day" series. Today we are exploring CodeGraph. Start with a scenario: you ask Claude Code "How is AuthService being called?" Without any assistance, Claude's approach is: glob-scan directories, run multiple greps, read several files — then finally answer. The whole process might trigger 10–15 tool calls and consume hundreds of thousands of tokens. CodeGraph's insigh...