nixos_config: Agent for Claude Code

.claude/agents/package-resolver.md

package-resolver is an agent for Claude Code from olafkfreund/nixos_config. It costs 46 tokens per session (4,270 once invoked), scanned A, original, GPL-3.0.

An agent that investigates package conflicts, version mismatches, and dependency collisions in project configuration.

In plain words
What is it for?
Use it when builds fail because modules require incompatible package versions or dependency overrides are difficult to untangle.
Why use it?
It helps identify why dependencies disagree and where an override or configuration change may be needed.

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 →

Needs its repository: it runs a file that does not travel with it, so clone the repository first. The line is (import ./overlays/custom-python.nix).

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/package-resolver.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 package-resolver

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

Your own site · 80×15
<a href="https://agentmods.dev/agents/olafkfreund/nixos_config/package-resolver"><img src="https://agentmods.dev/badge/agents/olafkfreund/nixos_config/package-resolver.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 46 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 4,270 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. 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 $0.00046 $0.04270
Opus 5.5 $0.00018 $0.01708
Sonnet 5.5 $0.00009 $0.00854
Haiku 4.5 $0.00005 $0.00427

Measured 1mo ago against content hash bdd9357e8255, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

package-resolver scanned grade A with 1 finding 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.

Makes network callslowCapability

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

- curl (system utility)
.claude/agents/package-resolver.md · 795 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 First seen · 795 lines · 46 tokens per session scan A bdd9357e8255

Subscribe to this mod's changes

package-resolver is an agent published in the GitHub repository olafkfreund/nixos_config (31 stars, last pushed today), licensed GPL-3.0. It adds 46 tokens to every session and 4,270 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it A with 1 finding (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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