What is dotfiles CLAUDE.md?

Repository instructions for dotfiles, which are configuration files used to set up a computer. They describe commands for rebuilding macOS or Linux configurations with Nix, linking files directly, and updating installed tools.

Use them when changing shared, macOS, Linux, or host-specific configuration, updating Nix inputs, or refreshing command-line tools. They also explain how to verify that a rebuild actually took effect.

They help an agent distinguish between rebuilding the system and only linking configuration files. They also include a rule that system rebuilds must be run by the user, which helps avoid unintended machine changes.

dotfiles CLAUDE.md — Instructions file for coding agents by fredrikaverpil: Repository instructions for dotfiles, which are configuration fi

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods

npx agentmods add instructions/fredrikaverpil/dotfiles/claude-md

Clone the repo

git clone --depth 1 https://github.com/fredrikaverpil/dotfiles

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/fredrikaverpil/dotfiles/claude-md.svg)](https://agentmods.dev/instructions/fredrikaverpil/dotfiles/claude-md)

Your own site

<a href="https://agentmods.dev/instructions/fredrikaverpil/dotfiles/claude-md"><img src="https://agentmods.dev/badge/instructions/fredrikaverpil/dotfiles/claude-md.svg" alt="Measured on agentmods" height="20"></a>

Per session 1,865 This file is loaded in full into every session.

When invoked 1,865 The same file — it is already loaded in full.

Security scan B 2 findings. Scan, not verified.

Origin original 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	$0.01865	$0.01865
Opus 5	$0.00932	$0.00932
Sonnet 5	$0.00373	$0.00373
Haiku 4.5	$0.00186	$0.00186

Measured yesterday against content hash c071e3cfbcef, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade B, and why

dotfiles CLAUDE.md scanned grade B 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 yesterday.

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 rootmediumPrivilege escalation

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

- **Full rebuild (Darwin)**: `sudo darwin-rebuild switch --flake

Makes network callslowCapability

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

- **No curl|bash installers in activation**: AI/agent CLIs must come from

CLAUDE.md · 133 lines

How it starts

The opening of the file, as written. The whole thing — 133 lines — stays where its author put it; the contents beside it link to each section on GitHub.

CLAUDE.md

This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.

Core Commands

Full rebuild (Darwin): sudo darwin-rebuild switch --flake ~/.dotfiles#"$(hostname -s)" (hosts: zap, plumbus)
Full rebuild (NixOS): sudo nixos-rebuild switch --flake ~/.dotfiles#"$(hostname -s)" (host: rpi5-homelab)
Symlink dotfiles only (GNU Stow, no Nix rebuild): cd ~/.dotfiles; then run stow --dir=stow --target="$HOME" --restow --no-folding --adopt shared && stow --dir=stow/platform --target="$HOME" --restow --no-folding --adopt "$(uname -s)"; host="$(hostname -s)"; [ -d "stow/host/$host" ] && stow --dir=stow/host --target="$HOME" --restow --no-folding --adopt "$host" (shared first, then platform, then the optional host package)
Update all flake inputs: nix flake update, then rebuild
Update only unstable-pinned inputs: nix flake update nixpkgs-unstable nix-darwin home-manager-unstable llm-agents dotfiles, then rebuild
Refresh package-managed CLI tools after an update: uv tool upgrade --all and npm-tools-upgrade
Upgrade Homebrew packages (Darwin): brew update && brew upgrade — rebuilds only install/remove to match the declared set, they never bump versions (add --greedy to also bump self-updating casks)
Nix rebuild: ask user to run this, NEVER run it yourself
Nix validation: nix flake check or nix flake check --all-systems
Nix builds: nix build .#darwinConfigurations.<host>.system (hosts: zap, plumbus on Darwin; rpi5-homelab on NixOS)
Format Nix files: nix fmt (uses nixfmt-rfc-style)
CI testing: Follow .github/workflows/test.yml workflow
Toolchain outside Neovim: language toolchains (go, python3, node, ruby, rustup, elixir, tree-sitter, ...) are NOT on the base PATH — shell/bin/nvim injects them into Neovim only. When running outside Neovim (e.g. Claude Code under Remote Control) and needing them, use the devshell: nix develop ~/.dotfiles#dev -c <cmd> (or enter with nix develop ~/.dotfiles#dev). Defined once in nix/shared/toolchain.nix, shared by the devshell and Neovim's nvim-deps-path.

Read the full file on GitHub · 133 lines

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.

yesterday Changed · +2 lines · +65 tokens per session c071e3cfbcef
5d ago First seen · 131 lines · 1,800 tokens per session scan B 39a8820b5e46

Subscribe to this mod's changes

dotfiles CLAUDE.md is an instructions file published in the GitHub repository fredrikaverpil/dotfiles (257 stars, last pushed today), licensed MIT. It adds 1,865 tokens to every session, about $0.0093 per session on Opus 5. A static security scan graded it B 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 2026-08-30.

DevOps and cloud bash dotbot dotfiles zsh

dotfiles CLAUDE.md