Borrowing it
Nothing to install: this file belongs to michalzubkowicz/nixos-management-skill. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/michalzubkowicz/nixos-management-skill/main/AGENTS.mdgit clone --depth 1 https://github.com/michalzubkowicz/nixos-management-skillWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/instructions/michalzubkowicz/nixos-management-skill/agents-md)<a href="https://agentmods.dev/instructions/michalzubkowicz/nixos-management-skill/agents-md"><img src="https://agentmods.dev/badge/instructions/michalzubkowicz/nixos-management-skill/agents-md/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/instructions/michalzubkowicz/nixos-management-skill/agents-md"><img src="https://agentmods.dev/badge/instructions/michalzubkowicz/nixos-management-skill/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00390 | $0.00390 |
| Opus 5.5 | $0.00156 | $0.00156 |
| Sonnet 5.5 | $0.00078 | $0.00078 |
| Haiku 4.5 | $0.00039 | $0.00039 |
Grade A, and why
nixos-management-skill AGENTS.md scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2mo ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
What it actually says
Agent instructions
This repository contains the nixos-managing skill — a structured set of Markdown files that teach an AI coding agent how to safely manage NixOS systems (rebuilds, flakes, modules, deployment, impermanence, LUKS remote-unlock, monitoring).
Any agent that understands this AGENTS.md convention should:
- Treat
nixos-managing/SKILL.mdas the entry point — it contains a decision table pointing to the right reference file for the task. - Load reference files on demand based on that table:
configuration.md— flakes, modules, packages, services, secretsvm-management.md—nixos-rebuild, generations, rollback, remote deploymentinstallation.md— initial install, disko, hardware configurationimage-building.md— ISO, VM, disk imagesimpermanence.md— ephemeral root, wipe-on-bootluks.md— disk encryption, remote unlock (SSH, Tailscale)monitoring.md— health checks and alertinganti-patterns.md— common mistakes
- Verify every NixOS option before suggesting it (the skill includes guidance on this —
search.nixos.org/optionsis always available). - Ask the user about the execution context (local NixOS host vs. remote deploy from macOS/Linux) before suggesting commands.
This file follows the agents.md convention and is honored by OpenAI Codex CLI, Cursor, Aider, Zed, Amp, Gemini CLI, Google Jules, Windsurf, Factory, RooCode, and many others.
For Claude Code, the richer native format is .claude-plugin/ + nixos-managing/SKILL.md.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 2mo ago First seen · 23 lines · 390 tokens per session scan A 2ef8dbb3f280
nixos-management-skill AGENTS.md is an instructions file published in the GitHub repository michalzubkowicz/nixos-management-skill (67 stars, last pushed 3mo ago), licensed MIT. It adds 390 tokens to every session, about $0.0016 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
nixos-management-skill AGENTS.md compared with instructions from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| nixos-management-skill AGENTS.mdmichalzubkowicz/nixos-management-skill | Instructions file | 67 | 3mo ago | MIT | A | 390 | Codex, OpenCode |
| vscode buildNext.instructions.mdmicrosoft/vscode | Instructions file | 195k | yesterday | MIT | A | 9,719 | GitHub Copilot |
| next.js AGENTS.mdvercel/next.js | Instructions file | 143k | yesterday | MIT | A | 7,461 | Codex, OpenCode |
| langchain AGENTS.mdlangchain-ai/langchain | Instructions file | 149k | yesterday | MIT | A | 4,680 | Codex, OpenCode |
| vscode oss-third-party-notices.instructions.mdmicrosoft/vscode | Instructions file | 195k | yesterday | MIT | A | 5,516 | GitHub Copilot |
| vscode copilot-instructions.mdmicrosoft/vscode | Instructions file | 195k | yesterday | MIT | A | 3,093 | GitHub Copilot |
| deepseek-harness AGENTS.mddeepseek-ai/deepseek-harness | Instructions file | 274k | 2d ago | MIT | A | 4,313 | Codex, OpenCode |