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.
npx agentmods add instructions/citypaul/mac-dev-machine-setup/claude-mdgit clone --depth 1 https://github.com/citypaul/mac-dev-machine-setupWhat 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 | $0.01691 | $0.01691 |
| Opus 5 | $0.00846 | $0.00846 |
| Sonnet 5 | $0.00338 | $0.00338 |
| Haiku 4.5 | $0.00169 | $0.00169 |
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 3d 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.
How it starts
The opening of the file, as written. The whole thing — 156 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
makeormake 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 tasksmake personal- Install personal-specific packagesmake keys- Install private keys (requires vault password)make cli- Install CLI tools onlymake gui- Install GUI applications onlymake osx- Configure macOS system preferencesmake dock- Configure dock itemsmake fonts- Install fontsmake themes- Install themesmake app-store- Install Mac App Store appsmake dotfiles- Sync dotfiles from external repositorymake git- Configure git identity, aliases, and GPG signing (runsgit-personaltag)make node- Install Node.js tooling onlymake permissions- Standalone run of the macOS TCC permission pre-flightmake work-remove- Remove work-only packages (runswork-removetag)
Running Specific Tasks
To run individual Ansible tasks with specific tags:
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.
- 3d ago First seen · 156 lines · 1,691 tokens per session scan A 8b061321c0cd
mac-dev-machine-setup CLAUDE.md is an instructions file published in the GitHub repository citypaul/mac-dev-machine-setup (24 stars, last pushed 1mo ago), licensed MIT. It adds 1,691 tokens to every session, about $0.0085 per session on Opus 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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