nix-agent SKILL.md skillA
nix-agent from jeff7712/nix-agent is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add jeff7712/nix-agent/nix-agent@git:20261022.0627ab3Pins git:20261022.0627ab3 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- jeff7712/nix-agent
- Path
skills/nix-agent/SKILL.md- Versions recorded
- 9
- Latest version
- git:20261022.0627ab3, committed Oct 22, 2026
- First version recorded
- Jul 13, 2026
- Size
- 19,451 bytes
- Repository stars
- 17
- License
- MIT
Operate on this machine's NixOS or Home Manager configuration with the nix-agent MCP tools (build, diff, switch, generations, eval_config, locate_option, check). Use when changing packages, options, or modules; diagnosing a failed build or switch; rolling back a generation; or asking what the live config currently resolves to. Requires the nix-agent MCP server (usually alongside mcp-nixos).
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Nix Agent ## Overview `nix-agent` MCP tools do not edit configuration files. They build, diff, switch, and manage generations (the operational core), and evaluate, locate, and check the live config (introspection), handing every result back as a compact JSON envelope. Read the envelope: it already holds what you would otherwise re-fetch by hand. Division of labor: - **Your native tools** (Read/Edit/Write) edit `.nix` files. - **`mcp-nixos`** discovers packages and options (what exists, what it means). - **`nix-agent`** operates on the user's actual configuration (what their machine resolves, whether it builds, what a switch would change). Default is apply for local activation: after a config change, `diff()` then `switch()` without waiting, unless the user asked to preview or check. Follow the repository's deployment workflow for coordinated fleet rollout. ## Check tool availability Inspect the session's exposed tool catalog, or the host's MCP tool-discovery facility, once for this server's seven tools before planning around them. This needs no build, check, or activation call. A skill, installed binary, …
Read the whole file at its exact version.
How to install
mdr add jeff7712/nix-agent/nix-agent@sha256:c549c6732103d8d3The line at the top of this page pins the label git:20261022.0627ab3, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_broblhqwu7stcel5)
3 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 9 versions of this file, between Jul 13, 2026 and Oct 22, 2026, about one every 13 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261022.0627ab3 latest | 2026-10-22 | 0627ab3 | 19,451 B | A | view · diff |
| git:20261022.2ae504f | 2026-10-22 | 2ae504f | 19,259 B | A | view · diff |
| git:20261015.948c720 | 2026-10-15 | 948c720 | 19,143 B | A | view · diff |
| git:20261002.aeffd5a | 2026-10-02 | aeffd5a | 12,789 B | A | view · diff |
| git:20260822.d1c961b | 2026-08-22 | d1c961b | 11,414 B | A | view · diff |
| git:20260812.3ff59fa | 2026-08-12 | 3ff59fa | 9,676 B | A | view · diff |
| git:20260812.58be358 | 2026-08-12 | 58be358 | 10,036 B | A | view · diff |
| git:20260812.7f0dea2 | 2026-08-12 | 7f0dea2 | 7,913 B | A | view · diff |
| git:20260713.0d12db0 | 2026-07-13 | 0d12db0 | 7,473 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (19451 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
jeff7712/nix-agent · 17 stars · license MIT · pushed 2026-10-28 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_broblhqwu7stcel5 GET https://markdownregistry.com/api/v1/resolve?ref=jeff7712/nix-agent/nix-agent GET https://markdownregistry.com/api/v1/blob/c549c6732103d8d3d60ef4e840acb0766535c9eed62fc0f68e5728cceee3260e
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.