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 or LM Studio), SQLite, and your CPU. A single static binary and your own local embedding server. The payoff is measurable and reproducible: across 9 benchmark runs on 9 languages and real GitHub bug-fix tasks, Lumen cuts cost in every single language — up to 39%.
| Stars | 244 |
| Forks | 28 |
| Language | Go |
| Category | MCP 服务器 |
| Quality Score | 65.976774771677/100 |
| Open Issues | 20 |
| Last Updated | 2026-08-11 |
| Created | 2026-02-27 |
| Platforms | claude-code, codex, gemini, go, mcp |
| Est. Tokens | ~20k |
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lumen is Save 30% token costs when using Claude Code, Codex, OpenCode for free - with open source, local semantic search. Works for small and large codebases and monorepos! Enterprise-ready and fully compliant. It is categorized as a MCP 服务器 with 244 GitHub stars.
lumen is primarily written in Go. It covers topics such as agentic-coding, claude, claude-ai.
You can find installation instructions and usage details in the lumen GitHub repository at github.com/ory/lumen. The project has 244 stars and 28 forks, indicating an active community.