When Claude Code explores a codebase it does not know, it spawns Explore agents that scan files with grep, glob, and Read. Every one of those calls costs tokens and time. And most of that work is not even useful analysis. It is discovery: figuring out where things live before the agent can start reading the code that actually matters.
CodeGraph removes that discovery step. Instead of letting the agent explore blind, it hands the agent a map.
What it is
CodeGraph is an open-source tool that builds a pre-indexed knowledge graph of your codebase: symbols, call graphs, imports, inheritance, and code structure. The agent queries that graph in one shot instead of scanning files one by one.
It runs as an MCP server for Claude Code, is MIT licensed, supports 19+ languages, and is 100 percent local. No API keys. No data leaving your machine. Just a SQLite database.
