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nix-config: Instructions file for Claude Code

CLAUDE.md

nix-config CLAUDE.md is an instructions file for Claude Code from Kyure-A/nix-config. It costs 3 tokens per session, scanned A, original, GPL-3.0.

Project-specific instructions for Claude Code in the Kyure-A nix-config repository. Nix-config is a collection of configuration files managed with the Nix system.

In plain words
What is it for?
Guiding Claude Code while editing or reviewing the referenced nix-config project.
Why use it?
It tells Claude Code which instructions apply when working in that repository.

Instructions file for Claude Code

Written for Claude Code: the file is CLAUDE.md.

This is Kyure-A/nix-config's own configuration. It tells Claude Code how to work on nix-config itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything nix-config configures →

not rated 5repo changed 1mo ago A scan 3 tokens GPL-3.0
View source ↗ Kyure-A/nix-config
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/CLAUDE.md
Clone the repo
git clone --depth 1 https://github.com/Kyure-A/nix-config

Made for: Claude Code.

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.

agentmods badge for nix-config CLAUDE.md

README.md
[![agentmods](https://agentmods.dev/badge/instructions/kyure-a/nix-config/claude-md/github.svg)](https://agentmods.dev/instructions/kyure-a/nix-config/claude-md)
Your own site
<a href="https://agentmods.dev/instructions/kyure-a/nix-config/claude-md"><img src="https://agentmods.dev/badge/instructions/kyure-a/nix-config/claude-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.

agentmods 80×15 button for nix-config CLAUDE.md

Your own site · 80×15
<a href="https://agentmods.dev/instructions/kyure-a/nix-config/claude-md"><img src="https://agentmods.dev/badge/instructions/kyure-a/nix-config/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 3 This file is loaded in full into every session.
When invoked 3 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00003 $0.00003
Opus 5.5 $0.00001 $0.00001
Sonnet 5.5 $0.00001 $0.00001
Haiku 4.5 $0.00000 $0.00000

Measured 1mo ago against content hash a54ff182c7e8, 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 CLAUDE.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.

CLAUDE.md · 1 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.

  1. 1mo ago Changed · -19 tokens per session a54ff182c7e8
  2. 2mo ago First seen · 1 lines · 22 tokens per session scan A ce851585a170

Subscribe to this mod's changes

nix-config CLAUDE.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 3 tokens to every session, about $0.0000 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.

nix-darwinnixos-configurationnixos-wsl
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