macOS Application / Open Source

Open Source2026

ChatGPT Touch Bar

Overview of ChatGPT Touch Bar with Codex usage meters

While I am using the ChatGPT or Codex app, or a ChatGPT tab in Safari, this macOS helper displays my Codex usage on a MacBook Pro Touch Bar.

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It shows the remaining capacity in the five-hour and weekly windows, together with the next reset time. When I switch to an unrelated app or website, the Touch Bar automatically returns to its normal controls.

It runs locally with the existing Codex sign-in, so no API key or paid developer API is required. It uses no analytics, telemetry, or external database; the Safari integration checks only the URL of the current tab.

Touch Bar display while ChatGPT is open in Safari
Touch Bar display while using ChatGPT in Safari
  • Shows the remaining capacity in the Codex five-hour and weekly windows
  • Displays the next reset time and refreshes automatically every 30 seconds
  • Supports the ChatGPT and Codex desktop apps as well as Safari
  • Shows or restores the Touch Bar interface according to the current context
Requires a MacBook Pro with Touch Bar and macOS 12 or later. A signed binary is not available yet, so it currently needs to be built from source.
SwiftAppKitNSTouchBarNSWorkspaceAppleScriptCodex App Server

iOS Application

In Development2026

TaskManager

TaskManager is an iPad daily planner for writing a schedule with Apple Pencil and keeping track of time and completion. It is designed for people who plan every day and value the feeling of having shaped the day by hand.

The idea came from writing my daily tasks in Goodnotes. I want the app to feel natural for people who prefer handwriting to typing and use the act of writing to engage more intentionally with their plans.

Because relatively few task-management apps in Japan focus on handwriting, I am prioritizing clarity and everyday ease of use instead of packing in more features.

  • Stores handwritten plans and recognizes text written with Apple Pencil
  • Organizes the day into morning, afternoon, and evening with completion tracking
  • Accepts handwritten start and end times and schedules local notifications
  • Carries over unfinished tasks and provides history and backup
The app is currently in development and testing and is not yet available on the App Store. A download link will be added after release.
SwiftSwiftUIPencilKitVisionUserNotifications
App Store: Not yet available

Web Application

Work in Progress2026

Your Feel Of Wallpaper

A web application for exploring combinations of wallpaper and music that fit a mood or time of day, accompanied by comments from other people.

The atmosphere changes across morning, daytime, evening, and night while users browse posts by scrolling through a space with a sense of depth.

  • Changes the background and posts according to the time of day
  • Uses depth-based scrolling to explore posts
  • Shows wallpaper, comments, tags, and links to music services
  • Supports keyboard controls and Reduced Motion
This project is still in development. Sign-in, real posts, search, and data storage are not implemented; the current content uses mock data.
HTMLCSSJavaScriptWebGLCloudflare Pages
Live Preview Source code: Private
© 2026 SOSUKE TAKAHASHI