nixos_config: Agent for Claude Code

.claude/agents/security-patrol.md

security-patrol is an agent for Claude Code from olafkfreund/nixos_config. It costs 53 tokens per session (3,507 once invoked), scanned A, original, GPL-3.0.

An agent that audits NixOS hosts for security weaknesses, weak systemd hardening, and unnecessary exposure, then proposes fixes based on repository patterns.

In plain words
What is it for?
Use it for periodic host security reviews, service additions, and pre-exposure hardening checks.
Why use it?
It helps find security problems before a service is exposed or after system configuration changes.

Agent for Claude Code

Written for Claude Code: context: fork in frontmatter. Also seen: model in frontmatter.

This is olafkfreund/nixos_config's own configuration. It tells Claude Code how to work on nixos_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 nixos_config configures →

Reuse

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.

Copy the file
curl -O https://raw.githubusercontent.com/olafkfreund/nixos_config/main/.claude/agents/security-patrol.md
Clone the repo
git clone --depth 1 https://github.com/olafkfreund/nixos_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 security-patrol

README.md
[![agentmods](https://agentmods.dev/badge/agents/olafkfreund/nixos_config/security-patrol/github.svg)](https://agentmods.dev/agents/olafkfreund/nixos_config/security-patrol)
Your own site
<a href="https://agentmods.dev/agents/olafkfreund/nixos_config/security-patrol"><img src="https://agentmods.dev/badge/agents/olafkfreund/nixos_config/security-patrol/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 security-patrol

Your own site · 80×15
<a href="https://agentmods.dev/agents/olafkfreund/nixos_config/security-patrol"><img src="https://agentmods.dev/badge/agents/olafkfreund/nixos_config/security-patrol.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 53 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 3,507 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 2 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 $0.00053 $0.03507
Opus 5 $0.00026 $0.01754
Sonnet 5 $0.00011 $0.00701
Haiku 4.5 $0.00005 $0.00351

Measured 7d ago against content hash 5e4efc5b430b, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade A, and why

security-patrol scanned grade A 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 7d 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 rootlowPrivilege escalation

A mod that escalates privileges can change anything on the machine, not only the project.

**What it does**: Reviews user accounts, sudo permissions, and SSH access

Downgraded: this mod is about security review, or the phrase is quoted, so it is likely naming the pattern rather than instructing it.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

buildInputs = [ curl jq ];
.claude/agents/security-patrol.md · 568 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. 7d ago First seen · 568 lines · 53 tokens per session scan A 5e4efc5b430b

Subscribe to this mod's changes

security-patrol is an agent published in the GitHub repository olafkfreund/nixos_config (23 stars, last pushed yesterday), licensed GPL-3.0. It adds 53 tokens to every session and 3,507 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 2 findings (asks for root, makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-01.

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