codexisland-macos-notch

CodexIsland macOS Notch

Skill by ara.so — Codex Skills collection.

CodexIsland is a native macOS overlay that transforms your MacBook notch into a Dynamic Island-style live activity display for Claude Code and Codex usage limits. It shows 5-hour and weekly usage windows for both providers, estimates dollar spend and token throughput from local session logs, and provides a swipeable Cost screen—all while remaining local-first and credential-free.

What CodexIsland Does

• Dual-provider monitoring: Tracks Claude (5h + 7d) and Codex (5h + 7d) usage limits in one notch overlay
• Notch-native overlay: Black pill aligned to the physical notch with squircle corners; falls back to menu-bar pill on non-notched Macs
• Hover to peek: Shows 5-hour percentage and reset headline for visible providers
• Click to expand: Opens full Usage/Cost panel with provider columns and chart controls
• Swipeable screens: Usage screen (live limits) + Cost screen (local log analysis for $ spend & tokens)
• Five chart styles: Ring, Bar, Stepped, Numeric, Sparkline
• Local-first privacy: Reads existing credentials from Claude Code/Codex; no API keys stored; no telemetry

Installation

Homebrew (Recommended)

brew install --cask ericjypark/tap/codexisland

The cask automatically strips the Gatekeeper quarantine attribute.

Direct Download

1. Download CodexIsland-X.Y.Z.dmg from GitHub Releases
2. Drag CodexIsland.app to /Applications
3. Remove quarantine attribute (app is unsigned):

xattr -dr com.apple.quarantine /Applications/CodexIsland.app

Manual Gatekeeper Bypass (No Terminal)

1. Drag app to /Applications
2. Try to open (macOS will block it)
3. Open System Settings → Privacy & Security
4. Scroll to bottom, find blocked CodexIsland message
5. Click Open Anyway, then re-launch

First Run Authentication

CodexIsland reads existing credentials—no manual API key entry needed.

Claude Setup

CodexIsland tries these sources in order:

1. CLAUDE_CODE_OAUTH_TOKEN environment variable
2. macOS Keychain item Claude Code-credentials
3. Refresh token from Anthropic's OAuth endpoint

Prerequisites:

# Run Claude CLI once to populate credentials
claude

# OR open Claude Desktop app

If authentication fails, the panel shows auth required — run claude.

Codex Setup

CodexIsland reads ~/.codex/auth.json created by the Codex CLI.

Prerequisites:

# Sign in to Codex/ChatGPT CLI
codex auth login

If the file or token is missing, the panel shows no codex auth.

Using the App

Basic Interaction

Action	Result
Hover notch	Peek at current 5-hour usage
Click island	Expand full Usage/Cost panel
Swipe horizontally	Switch between Usage and Cost screens
Move away	Collapse island
Cmd-click panel	Cycle chart styles (Usage: Ring/Bar/Stepped/Numeric/Sparkline; Cost: USD/VALUE/TOKENS/TREND)
Click "synced Xs ago"	Force immediate refresh
Click gear icon	Open Settings

Chart Styles

Usage Screen:

• Ring: Circular progress indicator
• Bar: Horizontal bar chart
• Stepped: Stepped area chart
• Numeric: Large percentage numbers
• Sparkline: Minimal line chart

Cost Screen:

• USD: Dollar spend (today + month-to-date)
• VALUE: Spend vs. subscription value
• TOKENS: Total token throughput
• TREND: Token usage trend over time

Token Counting Modes

All Tokens (default, matches ccusage):

• Counts every token type that crossed the wire
• Includes cache reads/writes

Billable Only (matches claude.ai stats):

• Input + output tokens only
• Excludes cache tokens

Toggle in Settings → Token Counting.

Configuration

Settings Panel

Access via gear icon in expanded panel. All settings persist to UserDefaults.

Setting	Key	Values	Default
Chart Style	MacIsland.chartStyle	ring, bar, stepped, numeric, spark	ring
Cost Style	MacIsland.costStyle	dollar, multi, tokens, spark	dollar
Token Counting	MacIsland.tokenCountMode	all, billable	all
Refresh Interval	MacIsland.refreshInterval	300, 900, 1800 (seconds)	300 (5 min)
Low Power Mode	MacIsland.lowPowerMode	Boolean	false
Claude Visible	MacIsland.claudeVisible	Boolean	true
Codex Visible	MacIsland.codexVisible	Boolean	true
Launch at Login	Managed by SMAppService	Boolean	false

Refresh Intervals

Choose from Settings:

• 5 minutes (default)
• 15 minutes
• 30 minutes

Note: Sub-5-minute polling is not available due to Anthropic's rate limits on /api/oauth/usage.

Provider Visibility

Hide/show providers in Settings:

• Removes provider logo and column from island
• Keeps latest usage values in memory
• Re-showing does not require re-authentication

Building from Source

Requirements

• macOS 13+
• Xcode or Command Line Tools (Swift toolchain)

Build Steps

git clone https://github.com/ericjypark/codex-island
cd codex-island
./build.sh
open build/CodexIsland.app

No Xcode project or SwiftPM package. build.sh compiles with swiftc, creates universal binary (arm64 + x86_64), and assembles .app bundle.

Verification

Smoke test the build:

./scripts/verify.sh

Launches the binary for 1 second, then kills it if still alive.

Release Packaging

npm install --global create-dmg
./release.sh

Creates dist/CodexIsland-X.Y.Z.dmg with ad-hoc codesigning.

Code Architecture

Key Components

Sources/
├── App.swift                    # SwiftUI app entry point
├── Cost/                        # Local log cost + token aggregation
├── Model/                       # Data models for usage/cost
├── Theme/                       # UI theming and colors
├── Update/                      # Sparkle auto-update wrapper
├── Usage/
│   └── UsageFetcher.swift      # Network fetcher for provider APIs
├── Views/                       # SwiftUI views for island/panels
└── Window/                      # Custom window management

Network Surface (Privacy)

All network requests are in Sources/Usage/UsageFetcher.swift:

• Claude: https://api.anthropic.com/api/oauth/usage
• Codex: https://chatgpt.com/api/usage

Tokens are sent only as Authorization headers. No proxy server.

Local Log Reading (Cost Screen)

Cost screen reads local session logs:

Claude Code:

• ~/.claude/projects/**/*.jsonl
• ~/.config/claude/**/*.jsonl
• $CLAUDE_CONFIG_DIR/**/*.jsonl (if set)

Codex:

• ~/.codex/sessions/

All aggregation happens on-device. No log content is uploaded.

Troubleshooting

Authentication Issues

Claude shows "auth required — run claude"

# Option 1: Run Claude CLI
claude

# Option 2: Open Claude Desktop app (no command needed)

# Option 3: Set environment variable
export CLAUDE_CODE_OAUTH_TOKEN="your_token_here"

Codex shows "no codex auth"

# Sign in to Codex CLI
codex auth login

# Verify auth file exists
ls -la ~/.codex/auth.json

Stale Values After Error

Expected behavior: UsageStore retains previous good values when a refresh fails (e.g., 429 rate limit). Prevents panel from showing 0% during temporary errors.

Force refresh:

• Click "synced Xs ago" in panel header
• Or wait for next scheduled poll (respects refresh interval setting)

Rate Limiting

If you see persistent authentication errors:

1. Check refresh interval (Settings → Refresh Interval)
2. Increase to 15m or 30m to avoid Anthropic's rate limits
3. Click "synced Xs ago" to manually refresh when needed

macOS Compatibility

Non-notched Macs: Falls back to 200×28 menu-bar pill Multiple monitors: Prefers first display with safe-area insets (partial support)

Gatekeeper Warnings

CodexIsland is unsigned (free open-source project):

# Remove quarantine attribute
xattr -dr com.apple.quarantine /Applications/CodexIsland.app

# Verify removal
xattr -l /Applications/CodexIsland.app

Or use manual bypass via System Settings (see Installation section).

Advanced Usage

Programmatic Access to Settings

Settings are stored in UserDefaults with domain MacIsland:

# Read current chart style
defaults read MacIsland chartStyle

# Set refresh interval to 15 minutes
defaults write MacIsland refreshInterval -int 900

# Enable Low Power Mode
defaults write MacIsland lowPowerMode -bool true

# Hide Codex provider
defaults write MacIsland codexVisible -bool false

Auto-Updates (Sparkle)

CodexIsland uses Sparkle for auto-updates:

• Checks on launch + once per day
• EdDSA signature verification (no Apple Developer ID required)
• Toggle in Settings → Auto-Update

Appcast: https://github.com/ericjypark/codex-island/releases

Launch at Login

Managed by SMAppService.mainApp:

# Enable via Settings UI or Terminal
# (No direct command-line control for SMAppService)

Access via Settings → Launch at Login toggle.

Privacy Guarantees

• ✅ No app telemetry
• ✅ No crash reporting
• ✅ No third-party analytics
• ✅ No proxy server
• ✅ Credentials never stored by CodexIsland
• ✅ Tokens leave machine only as Authorization headers to official provider APIs
• ✅ Cost screen log aggregation is 100% on-device

Example Workflow

# 1. Install
brew install --cask ericjypark/tap/codexisland

# 2. Authenticate Claude
claude

# 3. Authenticate Codex
codex auth login

# 4. Launch app
open /Applications/CodexIsland.app

# 5. Configure settings
# - Hover notch → Click island → Click gear icon
# - Set refresh interval: 15 minutes
# - Set chart style: Bar
# - Enable Launch at Login
# - Enable Low Power Mode (hides steady-state glow)

# 6. Use the island
# - Hover to peek at 5-hour usage
# - Click to expand full panel
# - Swipe right to see Cost screen ($ spend + tokens)
# - Cmd-click to cycle chart styles
# - Click "synced Xs ago" to force refresh

Contributing

Repository: https://github.com/ericjypark/codex-island

# Fork and clone
git clone https://github.com/YOUR_USERNAME/codex-island
cd codex-island

# Build
./build.sh

# Test
./scripts/verify.sh

# Package DMG
./release.sh

CI/CD: .github/workflows/release.yml builds DMG and updates Homebrew tap on v* tags.