What is nix-config AGENTS.md?

A repository instruction file for a Nix configuration project. It explains the project's setup, Git workflow, agent skills, and how to add an outside skill.

Use it when working on the Kyure-A/nix-config repository, especially for Nix changes, Git tasks, or adding external skills.

It gives a coding agent project-specific guidance instead of relying only on general assumptions. This reduces mistakes when changing Nix configuration or following the repository's workflow.

How Kyure-A/nix-config configures Codex and OpenCode

Reuse

Borrowing it

Nothing to install: this file belongs to Kyure-A/nix-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.

Copy the file

curl -O https://raw.githubusercontent.com/Kyure-A/nix-config/master/AGENTS.md

Clone the repo

git clone --depth 1 https://github.com/Kyure-A/nix-config

Made for: Codex, OpenCode.

Wrote 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.

README.md

[![agentmods](https://agentmods.dev/badge/instructions/kyure-a/nix-config/agents-md/github.svg)](https://agentmods.dev/instructions/kyure-a/nix-config/agents-md)

Your own site

<a href="https://agentmods.dev/instructions/kyure-a/nix-config/agents-md"><img src="https://agentmods.dev/badge/instructions/kyure-a/nix-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.

Your own site · 80×15

<a href="https://agentmods.dev/instructions/kyure-a/nix-config/agents-md"><img src="https://agentmods.dev/badge/instructions/kyure-a/nix-config/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 209 This file is loaded in full into every session.

When invoked 209 The same file — it is already loaded in full.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin unknown No closer match found in the catalogue.

Token cost

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	$0.00209	$0.00209
Opus 5.5	$0.00084	$0.00084
Sonnet 5.5	$0.00042	$0.00042
Haiku 4.5	$0.00021	$0.00021

Measured 1mo ago against content hash 4abfcce2ed23, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

nix-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 1mo 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.

AGENTS.md · 18 lines

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.

Read it on GitHub

Changes

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.

1mo ago Changed · -19 lines · -63 tokens per session 4abfcce2ed23
2mo ago First seen · 37 lines · 272 tokens per session scan A 046068307831

Subscribe to this mod's changes

nix-config AGENTS.md is an instructions file published in the GitHub repository Kyure-A/nix-config (5 stars, last pushed 4d ago), licensed GPL-3.0. It adds 209 tokens to every session, about $0.0008 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.

Git and workflow nix-darwin nixos-configuration nixos-wsl

nix-config AGENTS.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
nix-config AGENTS.mdKyure-A/nix-config	Instructions file	5	4d ago	GPL-3.0	A	209	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

nix-config: Instructions file for Codex