Code-Navigation

cortexmd is an open-source long-term memory and code-navigation brain for AI agents, exposed over the Model Context Protocol. It gives an agent a persistent memory that survives across sessions and a way to navigate a codebase by querying an index instead of reading whole files into context. Self-hosted, MIT licensed, pre-alpha.

Part three of the cortexmd series. How a Rust tree-sitter indexer turns a repo into a SQLite symbol database, so an agent can navigate code by querying an index at roughly 60 tokens per result instead of reading whole files into context.

A capable coding agent forgets everything when a session ends and re-reads the same files every time, burning tokens. This is the story of how a private homelab MCP server grew two answers to those problems and became cortexmd, the first post in a four-part series.