What is mac-dev-machine-setup CLAUDE.md?

Instructions for an Ansible repository that installs and configures development tools and settings on Mac computers.

Use them to run a complete personal or work setup, install dependencies, update packages, preview changes, or run individual setup tasks.

They explain the repository’s setup commands and the permissions Homebrew needs, reducing guesswork during machine setup or updates.

How citypaul/mac-dev-machine-setup configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to citypaul/mac-dev-machine-setup. 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/citypaul/mac-dev-machine-setup/master/CLAUDE.md

Clone the repo

git clone --depth 1 https://github.com/citypaul/mac-dev-machine-setup

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.

README.md

[![agentmods](https://agentmods.dev/badge/instructions/citypaul/mac-dev-machine-setup/claude-md/github.svg)](https://agentmods.dev/instructions/citypaul/mac-dev-machine-setup/claude-md)

Your own site

<a href="https://agentmods.dev/instructions/citypaul/mac-dev-machine-setup/claude-md"><img src="https://agentmods.dev/badge/instructions/citypaul/mac-dev-machine-setup/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.

Your own site · 80×15

<a href="https://agentmods.dev/instructions/citypaul/mac-dev-machine-setup/claude-md"><img src="https://agentmods.dev/badge/instructions/citypaul/mac-dev-machine-setup/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 2,211 This file is loaded in full into every session.

When invoked 2,211 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 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 5.1	$0.02211	$0.02211
Opus 5.5	$0.00884	$0.00884
Sonnet 5.5	$0.00442	$0.00442
Haiku 4.5	$0.00221	$0.00221

Measured 1mo ago against content hash 78756eb19c10, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

mac-dev-machine-setup 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 · 176 lines

How it starts

The opening of the file, as written. The whole thing — 176 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.

Repository Overview

This is an Ansible-based automation repository for setting up and maintaining Mac development environments. It provides automated installation and configuration of development tools, applications, and system settings for both personal and work setups.

Common Development Commands

Full Setup Commands

make or make all - Complete personal setup (runs setup → deps → permissions → install → personal)
make work - Complete work setup (runs setup → deps → permissions → install → work)
make update - Update all installed packages (brew, npm, rust, go, etc.)
make check - Dry run to preview what changes would be made

All install/update targets first run make permissions, which verifies the terminal has the macOS TCC permissions Homebrew needs (App Management + Automation) and interactively requests them if missing — a one-time grant per machine/terminal.

Individual Task Commands

make deps - Install Ansible dependencies (required before other tasks)
make install - Run core installation tasks
make personal - Install personal-specific packages
make keys - Install private keys (requires vault password)
make cli - Install CLI tools only
make gui - Install GUI applications only
make osx - Configure macOS system preferences
make dock - Configure dock items
make fonts - Install fonts
make themes - Install themes
make app-store - Install Mac App Store apps
make dotfiles - Sync dotfiles from external repository
make git - Configure git identity, aliases, and GPG signing (runs git-personal tag)
make node - Install Node.js tooling only
make permissions - Standalone run of the macOS TCC permission pre-flight
make work-remove - Remove work-only packages (runs work-remove tag)

Running Specific Tasks

To run individual Ansible tasks with specific tags:

Read the full file on GitHub · 176 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.

1mo ago Changed · +20 lines · +520 tokens per session 78756eb19c10
2mo ago First seen · 156 lines · 1,691 tokens per session scan A 8b061321c0cd

Subscribe to this mod's changes

mac-dev-machine-setup CLAUDE.md is an instructions file published in the GitHub repository citypaul/mac-dev-machine-setup (25 stars, last pushed 1mo ago), licensed MIT. It adds 2,211 tokens to every session, about $0.0088 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.

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mac-dev-machine-setup: Instructions file for Claude Code