lumen

by ory · Go · ★ 173

Reduce Claude Code, Codex, OpenCode wall clock and token use by 50% with open source, local semantic search. Works for small and large codebases and monorepos! Enterprise-ready and fully compliant via Ollama and SQLite-vec.

#agentic-coding#claude#claude-ai#claude-code#claude-pl#codex#context#gemini#golang#gpt-5#mcp#mcp-server#plugin

Install

go install github.com/ory/lumen@latest

Claude Desktop config

Add this to your claude_desktop_config.json:

{
  "mcpServers": {
    "lumen": {
      "command": "npx",
      "args": [
        "-y",
        "github:ory/lumen"
      ]
    }
  }
}

From the README

[](https://github.com/ory/lumen/actions/workflows/ci.yml) [](https://goreportcard.com/report/github.com/ory/lumen) [](https://pkg.go.dev/github.com/ory/lumen) [](https://coveralls.io/github/ory/lumen?branch=main) [](LICENSE) Claude reads entire files to find what it needs. Lumen gives it a map. Lumen is a 100% local semantic code search engine for AI coding agents. No API keys, no cloud, no external database, just open-source embedding models ([Ollama](https://ollama.com/) or [LM Studio](https://lmstudio.ai/)), SQLite, and your CPU. A single static binary and your own local embedding server.…

Read full README on GitHub →