Antonin Januska

Boulder, Colorado · Writing since 2012

I build with AI and write about what I learn.

20+ years of software development, writing about AI workflows, technical leadership, and the craft of building things.

Antonin in a black cap and glasses in front of a graffiti brick wall
Years building
20+
GitHub stars
600+
Blogging since
2012

§ 1 · Start here

Three pieces to read first

  1. The Future is Bespoke, Personalized Software

    Every app I use is about 70% right. The last 30% never ships because the addressable market for it is one person -- me. So I built seven apps that are 100% right for one person, and I think that whole category of software is about to get eaten.

  2. The Local-First App Skill

    A reusable blueprint that tells Claude Code how to build a single-user app -- Next.js, node:sqlite, a pure logic core -- so every app I build comes out the same shape.

  3. I Built an AI-Friendly UI Pattern Library

    A UI pattern library where every pattern ships the prompt that rebuilds it, so a coding agent can put it in your codebase instead of you copying CSS.

§ 2 · AI & machine learning

Workflows, tools, and experiments

  1. I Built an AI-Friendly UI Pattern Library

  2. The Future is Bespoke, Personalized Software

  3. The Local-First App Skill

  4. An Honest Opinion on the State of Code Gen AI, Spring 2026 Edition

  5. I, AI: The Weight of Equal Parts (Part 3)

  6. The Claude Code Drawbacks

Everything on AI →

§ 3 · Digital garden

Engineering, opinions, and deep dives

  1. 17 Side Projects I Built With Claude Code in Two Months

  2. Common React Hooks Antipatterns and Gotchas

  3. The Simplest CSS Grids

  4. Constants vs Enums in TypeScript

All writing →

§ 4 · AI experiments

Projects, tools, and creative AI work

§ 5 · Elsewhere

Things people know me for

Programmer's Proverbs went past 600 stars. My YouTube channel covers AI and dev work. Cottage UI is the React library I built on camera. The rest is on the projects page.

Find me on LinkedIn and GitHub.

Work with me

I help companies implement AI workflows and accelerate their development teams.

Get in touch →