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usage-widget: Instructions file for Claude Code

CLAUDE.md

usage-widget CLAUDE.md is an instructions file for Claude Code from emm3ttarmstrong/usage-widget. It costs 944 tokens per session, scanned A, original, MIT.

Repository instructions for a macOS SwiftUI desktop widget that displays Claude Code usage as a contribution-style grid and rate-limit bars. They describe how to build it, where its code lives, and how it reads and combines usage data.

In plain words
What is it for?
Use them when changing the widget's SwiftUI views, usage calculations, cache handling, API polling, keychain authentication, or build setup.
Why use it?
They provide the app context and build commands an agent needs to make changes without breaking its data flow, authentication, or project structure.

Instructions file for Claude Code

Written for Claude Code: the file is CLAUDE.md. Also seen: reads .claude/ paths; mentions Claude Code.

This is emm3ttarmstrong/usage-widget's own configuration. It tells Claude Code how to work on usage-widget 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 usage-widget configures →

not rated 5repo 6mo ago A scan 944 tokens original MIT
View source ↗ emm3ttarmstrong/usage-widget x.com
Reuse

Borrowing it

Nothing to install: this file belongs to emm3ttarmstrong/usage-widget. 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/emm3ttarmstrong/usage-widget/main/CLAUDE.md
Clone the repo
git clone --depth 1 https://github.com/emm3ttarmstrong/usage-widget

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 usage-widget CLAUDE.md

README.md
[![agentmods](https://agentmods.dev/badge/instructions/emm3ttarmstrong/usage-widget/claude-md/github.svg)](https://agentmods.dev/instructions/emm3ttarmstrong/usage-widget/claude-md)
Your own site
<a href="https://agentmods.dev/instructions/emm3ttarmstrong/usage-widget/claude-md"><img src="https://agentmods.dev/badge/instructions/emm3ttarmstrong/usage-widget/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.

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Your own site · 80×15
<a href="https://agentmods.dev/instructions/emm3ttarmstrong/usage-widget/claude-md"><img src="https://agentmods.dev/badge/instructions/emm3ttarmstrong/usage-widget/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 944 This file is loaded in full into every session.
When invoked 944 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00944 $0.00944
Opus 5.5 $0.00378 $0.00378
Sonnet 5.5 $0.00189 $0.00189
Haiku 4.5 $0.00094 $0.00094

Measured 2mo ago against content hash 601e8c9f6ed8, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

usage-widget 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 2mo 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 · 77 lines

How it starts

The opening of the file, as written. The whole thing — 77 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Claude Code Usage Widget

macOS SwiftUI desktop widget showing Claude Code usage as a contribution grid + rate limit bars.

Build

make build      # Release build → build/Build/Products/Release/UsageWidget.app
make install    # Build + copy to /Applications
make clean      # Remove build/
make setup BUNDLE_ID=com.you.UsageWidget  # Change bundle ID in all 3 places

Or open UsageWidget/UsageWidget.xcodeproj in Xcode and hit Cmd+R.

Project Structure

UsageWidget/UsageWidget/
├── App/
│   ├── AppDelegate.swift          # NSPanel setup, menu bar, position persistence, App Nap prevention
│   └── UsageWidgetApp.swift       # @main entry point
├── Models/
│   ├── ContributionDay.swift      # Day model + IntensityLevel enum (message count thresholds)
│   └── StatsCache.swift           # Decodable for ~/.claude/stats-cache.json
├── ViewModels/
│   └── StatsViewModel.swift       # Loads cache, merges live JSONL data, polls API, builds grid
├── Views/
│   ├── ContentView.swift          # Root layout — grid + bars + hover stats row
│   ├── ContributionGraphView.swift # 16-week Mon-Fri grid with month labels
│   ├── ContributionCellView.swift  # Single cell with hover tooltip
│   └── UsageLimitBarView.swift     # Vertical fill bar for rate limits
├── Utilities/
│   ├── FileWatcher.swift          # DispatchSource file monitor on stats-cache.json
│   ├── LiveStatsComputer.swift    # Scans ~/.claude/projects/*/*.jsonl for recent activity
│   └── UsageAPIClient.swift       # Fetches /api/oauth/usage from Anthropic API
├── Info.plist                     # LSUIElement=YES (no dock icon)
├── UsageWidget.entitlements       # Keychain access group + network client
└── Assets.xcassets

Data Flow

  1. Cached history: ~/.claude/stats-cache.json — daily message/session counts from claude-code-stats CLI
  2. Live today: Scans ~/.claude/projects/*/ JSONL transcript files for today's messages (30s refresh)
  3. API rate limits: GET https://api.anthropic.com/api/oauth/usage with OAuth token (60s refresh)
  4. Plan tier: Reads ~/.claude/.credentials.json → claudeAiOauth.rateLimitTier

Read the full file on GitHub · 77 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. 2mo ago First seen · 77 lines · 944 tokens per session scan A 601e8c9f6ed8

Subscribe to this mod's changes

usage-widget CLAUDE.md is an instructions file published in the GitHub repository emm3ttarmstrong/usage-widget (5 stars, last pushed 6mo ago), licensed MIT. It adds 944 tokens to every session, about $0.0038 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 2026-08-31.

Claude Codecontribution-graphmacosmenu-barswiftswiftui
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