Show HN: cairn, a map of all your repos for coding agents

Category: devtools

Tags: developer-tools, code-analysis, ai-agents, mcp, repository-mapping, claude-code

Score: 6.5/10 (Innovation: 6, Technical: 6, Documentation: 8, Utility: 6)

Cairn scans a folder of git repositories to build a cross-repo map, giving coding agents a compact index and per-repo cards that reveal relationships with evidence and trust levels. It integrates with Claude Code, Codex, Gemini CLI, and Cursor via CLI, MCP tools, and a plugin, aiming to reduce token usage and context exploration when changes span multiple repos.

Target audience: backend developers, full-stack developers, devops engineers, AI coding agent users

Repository: https://github.com/Moe1177/cairn · Python · Apache-2.0 · 4 stars

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