Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx agentmods add instructions/bad3r/nixos/agents-mdgit clone --depth 1 https://github.com/Bad3r/nixosWrote 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/bad3r/nixos/agents-md)<a href="https://agentmods.dev/instructions/bad3r/nixos/agents-md"><img src="https://agentmods.dev/badge/instructions/bad3r/nixos/agents-md.svg" alt="Measured on agentmods" 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 | $0.04339 | $0.04339 |
| Opus 5 | $0.02169 | $0.02169 |
| Sonnet 5 | $0.00868 | $0.00868 |
| Haiku 4.5 | $0.00434 | $0.00434 |
Grade D, and why
nixos AGENTS.md scanned grade D with 2 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 3d 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.
Asks for rootmediumPrivilege escalation
A mod that escalates privileges can change anything on the machine, not only the project.
Shared device policy that serves multiple optional applications belongs in the common aggregate. For example, `modules/hosts/common/storage-diagnostics.nix` owns NVMe character-device permissions while app modules own th Recursive force deletehighDestructive command
rm -rf with a variable or a broad path is one typo away from removing the wrong tree.
- `rm -rf` on user files or directories The source is not reproduced here
Licensed AGPL-3.0
The repository is licensed AGPL-3.0, which this catalogue does not treat as permission to reproduce the file. Read it at the source.
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.
- 3d ago First seen · 347 lines · 4,339 tokens per session scan D afb75b9d79f9
nixos AGENTS.md is an instructions file published in the GitHub repository Bad3r/nixos (10 stars, last pushed 3d ago), licensed AGPL-3.0. It adds 4,339 tokens to every session, about $0.0217 per session on Opus 5. A static security scan graded it D with 2 findings (asks for root, recursive force delete). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
Other instructions, from other repositories
agent-skills AGENTS.md
Instructions for pulumi/agent-skills, covering pulumi agent skills, repository structure, migration plugin (migration/), pulumi plugin (pulumi/) and package maintenance plugin (package-maintenance/).
terragrunt-mcp-server copilot-instructions.md
Instructions for omattsson/terragrunt-mcp-server, covering terragrunt mcp server - ai assistant guide, architecture, key patterns, development and schema drift detection.
nix-config CLAUDE.md
Instructions for softinio/nix-config, covering claude.md, architecture, flake structure, user profiles and machine configuration.
agent-skills CLAUDE.md
Instructions for pulumi/agent-skills, a project described as: Official Pulumi Agent Skills for writing, migrating, and operating infrastructure with AI coding agents.
serverlessinsight AGENTS.md
Instructions for geek-fun/serverlessinsight, covering agents.md - coding conventions for ai agents, build/lint/test commands, build the project, lint check (without fixing) and lint and auto-fix issues.
apex-accelerator agent-skills.instructions.md
Guidelines for creating high-quality Agent Skills for GitHub Copilot.