Borrowing it
Nothing to install: this file belongs to olafkfreund/nixos_config. 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/olafkfreund/nixos_config/main/AGENTS.mdgit clone --depth 1 https://github.com/olafkfreund/nixos_configWrote 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/olafkfreund/nixos_config/agents-md)<a href="https://agentmods.dev/instructions/olafkfreund/nixos_config/agents-md"><img src="https://agentmods.dev/badge/instructions/olafkfreund/nixos_config/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/olafkfreund/nixos_config/agents-md"><img src="https://agentmods.dev/badge/instructions/olafkfreund/nixos_config/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 | $0.03701 | $0.03701 |
| Opus 5.5 | $0.01480 | $0.01480 |
| Sonnet 5.5 | $0.00740 | $0.00740 |
| Haiku 4.5 | $0.00370 | $0.00370 |
Grade A, and why
nixos_config 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 today.
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.
The source is not reproduced here
Licensed GPL-3.0
The repository is licensed GPL-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.
- today Changed · +2 lines · +44 tokens per session 9bd91eb0319b
- yesterday Changed · -3 lines · -58 tokens per session d44b86583b64
- 4d ago Changed · +2 lines · +37 tokens per session d404f900b33d
- 9d ago Changed · +4 lines · +74 tokens per session cde330b64753
- 24d ago Changed · +9 lines · +148 tokens per session 8a6a2fbcc184
- 26d ago Changed · +8 lines · +132 tokens per session ef2b67ea202c
- 28d ago Changed · +9 lines · +101 tokens per session 62d434c159c0
- 1mo ago Changed · +12 lines · +143 tokens per session 024578e738be
- 1mo ago Changed · +104 lines · +1,903 tokens per session b6b166983195
- 1mo ago First seen · 98 lines · 1,177 tokens per session scan A 0eebbbea188c
nixos_config AGENTS.md is an instructions file published in the GitHub repository olafkfreund/nixos_config (31 stars, last pushed today), licensed GPL-3.0. It adds 3,701 tokens to every session, about $0.0148 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 2026-09-03.
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