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OpenAI, Anthropic, and Gemini each report token usage differently, and it stops being trivia the moment you track LLM cost. I build Spanlens, an open-
When I started building backend applications with Node.js, I found myself choosing between two extremes: Lightweight frameworks like Express that req
TypeScript ships with a set of generic utility types that transform existing types into new ones. They eliminate repetitive type definitions and make
pnpm workspaces in a monorepo: the setup that survived CI on Railway and the problems the docs don't warn you about The correct fix for spe
pnpm workspaces en monorepo: el setup que sobrevivió CI en Railway y los problemas que los docs no anticipan La solución correcta para acel
Originally published at ffmpeg-micro.com You need to process video in your TypeScript project. Maybe you're building a Next.js app that generates thu
Problem: "Every SaaS project needs an admin panel." Why I built it: After building multiple projects, I noticed I was repeating: Sidebar Analytics
Goal I want to create a Fibonacci grid pattern component in React that can the user can use and add elements to in any orientation.
The Post-Migration Performance Paradox You’ve done it. You moved your React application from Vite to Next.js to take advantage of Server Co
Over the past six months, I've built about 10 Agent Skills — the kind of scripts that LLM-powered coding agents invoke to get real work done. By the t
Most mind map tools store their data in a proprietary binary blob or lock you into a WYSIWYG editor. When I started Open MindMap, a React component, I
If you've been following AI regulation at all, you've probably heard about the EU AI Act. You may also have heard that parts of it were delayed. Tha
Angular's linkedSignal() just got a small upgrade with a big practical payoff. It can now read from larger signal state and write back to it with a cu
Next.js 14: 'Could not find the module in the React Client Manifest' — the real cause nobody tells you As a solo developer running a full A
About a year ago, a junior dev on our team wrote a cleanup job that nuked records without a tenant filter. In staging, thankfully — but it wiped ou
📝 Originally published in Japanese on Zenn. This is the English version. Canonical: https://zenn.dev/uya0526_design/articles/satellite3_metrics-ratio
📝 Originally published in Japanese on Zenn. This is the English version. Canonical: https://zenn.dev/uya0526_design/articles/satellite2_haiku-coachin
📝 Originally published in Japanese on Zenn. This is the English version. Canonical: https://zenn.dev/uya0526_design/articles/satellite1_amivoice-bff
📝 Originally published in Japanese on Zenn. This is the English version. Canonical: https://zenn.dev/uya0526_design/articles/main_article_reading-spe
Functional programming in TypeScript: the abstractions I actually use and the ones I dropped There's a specific moment I recognize in almos