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`](https://github.com/utensils/mcp-nixos). nix-agent operates on your actual configuration, `mcp-nixos` handles package and option discovery. Optional local usage logging (`NIX_AGENT_USAGE_LOG=1`) records per-call byte accounting; run `nix-agent usage` to summarize. The documented default is high trust: unprompted `switch` / `generations` and passwordless sudo narrowed to this machine's flake. Lower trust (host prompts, a sudo password) is an opt-down. > **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/usage.md#install). ## Docs - [docs/usage.md](docs/usage.md): install, MCP host config, tool surface, workflow, design notes - [docs/agent-install.md](docs/agent-install.md): high-trust install guide for agents - [docs/privileged-automation.md](docs/privileged-automation.md): default non-interactive dry-activate, switch, and rollback (opt-down for a sudo password) - [skills/nix-agent/SKILL.md](skills/nix-agent/SKILL.md): companion workflow skill - [skills/nix-agent-init/SKILL.md](skills/nix-agent-init/SKILL.md): repo onboarding skill --- The nix-agent logo adapts the Nix snowflake from [NixOS/nixos-artwork](https://github.com/NixOS/nixos-artwork), licensed [CC-BY 4.0](https://creativecommons.org/licenses/by/4.0/).