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mac-stats: Instructions file for Claude Code

CLAUDE.md

mac-stats CLAUDE.md is an instructions file for Claude Code from luizhcastro/mac-stats. It costs 7,778 tokens per session, scanned A, a copy of mac-stats AGENTS.md, MIT.

A project guide for MacStats, a native macOS menu-bar system monitor. It documents the app's purpose, supported features, limits, technology choices, and development rules.

In plain words
What is it for?
Use it when developing or maintaining MacStats, including its SwiftUI and AppKit code, system metrics, and Swift Package Manager setup.
Why use it?
It gives coding agents the product context and boundaries needed to make changes that fit the existing MacStats project.

Instructions file for Claude Code

Written for Claude Code: the file is CLAUDE.md.

This is luizhcastro/mac-stats's own configuration. It tells Claude Code how to work on mac-stats 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 mac-stats configures →

not rated 28repo changed 22d ago A scan 7,778 tokens copy · 91% MIT
View source ↗ luizhcastro/mac-stats macstats.luizcastro.dev
Reuse

Borrowing it

Nothing to install: this file belongs to luizhcastro/mac-stats. 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/luizhcastro/mac-stats/main/CLAUDE.md
Clone the repo
git clone --depth 1 https://github.com/luizhcastro/mac-stats

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.

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README.md
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Per session 7,778 This file is loaded in full into every session.
When invoked 7,778 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 91% copy Near-identical to another mod 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 $0.07778 $0.07778
Opus 5.5 $0.03111 $0.03111
Sonnet 5.5 $0.01556 $0.01556
Haiku 4.5 $0.00778 $0.00778

Measured 22d ago against content hash 1863372b94ca, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

mac-stats 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 22d 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.

Origin

This is a copy

91% identical to mac-stats AGENTS.md — 74 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

CLAUDE.md · 285 lines

How it starts

The opening of the file, as written. The whole thing — 285 lines — stays where its author put it; the contents beside it link to each section on GitHub.

MacStats — Agent Guide

Native macOS menu bar system monitor. Inspired by iStat Menus. Personal use, not App Store.

Product context

  • Replace macOS Activity Monitor for quick glances at CPU/RAM/Disk/Network/Battery.
  • Menu bar first: compact metrics always visible; dropdown for detail.
  • Per-process tops (CPU/RAM/Disk) so the user can spot hogs without opening Activity Monitor.
  • Target audience: the repo owner. No localization, no onboarding. Telemetry is limited to the opt-out daily Umami ping (see Updates & analytics).

Non-goals

  • App Store distribution (no sandboxing, no notarization pipeline).
  • Cross-platform. macOS 13+ only (uses modern SwiftUI APIs + IOKit).
  • SMC voltage / current sensors. Keys vary per chip family and aren't mapped. (Fan RPM is supported via the SMC client added in v0.3.0; CPU/GPU/SOC temperatures via IOHID.)
  • Threshold-based notifications and world clocks / weather (intentionally out of scope vs iStat Menus parity).

Stack

  • Swift 6.3 toolchain + Swift 6 strict concurrency language mode (.swiftLanguageMode(.v6) in Package.swift). Every Sample struct is Sendable.
  • SwiftUI + AppKit (NSStatusItem for menu bar, SwiftUI for content).
  • Swift Package Manager (no Xcode project). Package.swift is the source of truth.
  • macOS 13+ deployment target.
  • One external dependency: Sparkle (auto-update), pinned exact: in Package.swift. Don't add others.

Build / run

Monorepo: the Swift app lives in apps/macos/, the landing page in apps/web/ (Vite + React + Tailwind). Run the commands below from apps/macos/.

./Scripts/run.sh           # debug bundle + launch
./Scripts/bundle.sh release  # release .app
swift build -c debug       # compile only
pkill -x MacStats          # kill running instance

run.sh wraps the SPM binary into a proper .app with Info.plist (sets LSUIElement=true so the app has no Dock icon). bundle.sh also copies Resources/AppIcon.icns into the bundle and wires CFBundleIconFile = AppIcon so Finder / About show the MacStats icon.

Read the full file on GitHub · 285 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.

  1. 22d ago Changed · +61 tokens per session 1863372b94ca
  2. 26d ago Changed · +11 lines · +987 tokens per session 57407639b635
  3. 27d ago Changed · +24 lines · +1,218 tokens per session efe446bf1674
  4. 2mo ago Changed · +4 lines · +215 tokens per session 97c83732d514
  5. 2mo ago First seen · 246 lines · 5,297 tokens per session scan A 42b9b9a42b8a

Subscribe to this mod's changes

mac-stats CLAUDE.md is an instructions file published in the GitHub repository luizhcastro/mac-stats (28 stars, last pushed 19d ago), licensed MIT. It adds 7,778 tokens to every session, about $0.0311 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 91% identical to mac-stats AGENTS.md, differing in 74 lines, and is treated as a copy.

freemacmacosmacos-appmenu-barmenubar
Related

mac-stats CLAUDE.md compared with instructions from other repositories

mac-stats CLAUDE.md next to 6 instructions from other repositories
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