Dev

Ralph Loop as a Plan Queue

• Jiyu Yan
• Tools
• 24 May, 2026

Ralph Loop is the simple idea of putting an AI coding agent in a loop and giving it enough structure to keep making progress. My version is deliberately smaller than the

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Vertical Slice Architecture with Dependency-Cruiser

• Jiyu Yan
• Engineering
• 23 May, 2026

I like vertical slices because they make a feature easier to delete, move, or review. The folder structure is not the main value. The value is that the code for one workflow is not spread across ten u

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Codex anywhere with tmux, Termius, and Tailscale

• Jiyu
• Tools
• 18 May, 2026

My current mobile Codex setup is deliberately simple: I use Termius on my phone to SSH into my own laptop, then run Codex inside a [tmux](https://gi

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Zod Beyond Validation

• Jiyu Yan
• Engineering
• 17 Apr, 2026

Zod is usually introduced as a validation library. That is true, but the more useful idea is boundary definition. A TypeScript type only helps after data is already inside the pro

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Localization in Product Apps

• Jiyu Yan
• Engineering
• 20 Mar, 2026

Localization is not only replacing English strings with another language. In a product app, language touches workflow. It changes labels, validation messages, dates, empty states, permissions copy, d

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Pragmatic Drag and Drop for Real Ordering Tasks

• Jiyu Yan
• Engineering
• 13 Feb, 2026

Drag and drop is easy to add for a demo and harder to make reliable for real work. The product question is not "can the item move on screen?" The question is whether the user can safely change an ord

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