Nix Agent
FreeNot checkedA local MCP server for trusted NixOS automation that enables inspecting files, applying patch sets, and validating/switching NixOS or Home Manager configuration
About
A local MCP server for trusted NixOS automation that enables inspecting files, applying patch sets, and validating/switching NixOS or Home Manager configurations.
README
A local MCP server that gives AI agents composable NixOS / Home Manager operations: build, diff, switch, and generations for the operational core, plus eval, locate, and check for config introspection.
It pairs with mcp-nixos. nix-agent
operates on your actual configuration, mcp-nixos handles package and option
discovery. Responses report raw vs returned bytes so token savings are
visible per call, not just claimed.
Experimental and a work in progress. Feedback and contributions welcome.
Install
Paste this to a coding agent (Codex, Claude Code, opencode, ...) and it does the install:
Read https://raw.githubusercontent.com/JEFF7712/nix-agent/main/docs/agent-install.md and follow every step to install nix-agent on this NixOS system, install the companion skills, and register nix-agent in my MCP settings for this machine.
Or do it by hand, see docs/usage.md.
Docs
- docs/usage.md: install, MCP host config, tool surface, workflow, design notes
- docs/agent-install.md: install guide for agents
- docs/privileged-automation.md: non-interactive dry-activate, switch, and rollback
- skills/nix-agent/SKILL.md: companion workflow skill
- skills/nix-agent-init/SKILL.md: repo onboarding skill
The nix-agent logo adapts the Nix snowflake from NixOS/nixos-artwork, licensed CC-BY 4.0.
Installing Nix Agent
This server has no published package — it is built from source. Open the repository and follow its README.
▸ github.com/JEFF7712/nix-agentFAQ
Is Nix Agent MCP free?
Yes, Nix Agent MCP is free — one-click install via Unyly at no cost.
Does Nix Agent need an API key?
No, Nix Agent runs without API keys or environment variables.
Is Nix Agent hosted or self-hosted?
Self-hosted: the server runs locally on your machine via the install command above.
How do I install Nix Agent in Claude Desktop, Claude Code or Cursor?
Open Nix Agent on unyly.org, pick your client tab (Claude Desktop, Claude Code, Cursor) and press Install — the config is generated automatically, no JSON editing.
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