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Developer Blog Post
Summary
A detailed walkthrough of Mitchell Hashimoto developing Ghostty's unobtrusive macOS update notification feature using AI agentic coding tools, sharing every session unedited alongside his own manual iteration and reasoning.
Highlights
- Every agentic coding session shared unedited, showing real AI-assisted development of a shipping feature
- Emphasizes human iteration as essential; AI is an assistant, not a replacement for domain expertise
- Feature embeds update status in the terminal titlebar using Sparkle framework and macOS titlebar accessory controllers
- Includes token cost breakdown for those curious about AI coding expenses
- Motivated by a Ghostty update prompt interrupting a high-profile OpenAI keynote demo
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Context
Audience
Developers interested in AI-assisted coding workflows, macOS app developers, and those evaluating agentic programming tools for real-world feature development
DomainAI-Assisted Software Development
Formatlong-form blog post
Accessfree online
Source Overview
The post documents the development of an unobtrusive macOS automatic update notification feature for Ghostty, created primarily with AI tools but involving substantial human coding and iteration.
The author details each agentic coding session, highlighting how AI was used for prototyping, inspiration, and bug investigation, while emphasizing the necessity of manual intervention for quality and understanding. The new feature embeds update status unobtrusively in the terminal window, avoiding disruptive prompts or window focus changes.
Topics
Related
Ghostty terminal emulatorSparkle macOS update frameworkmacOS titlebar accessory controllersAgentic coding workflowsMitchell Hashimoto
