ANTJANUSAntonin Januska · Boulder, CO
Antonin Januska in a black cap and glasses in front of a graffiti brick wall
1Operator: Antonin Januska, Staff Engineer
2Location: Boulder, Colorado
3In service: 20+ years building software
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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.

Years building
20+
GitHub stars
600+
Blogging since
2012

Start here

Three pieces that explain what this site is about.

AI-011
AI Workflows

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.

AI-010
AI Development

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.

AI-012
AI

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.

AI & machine learning

Workflows, tools, and experiments.

All 12 AI sheets
AI-012

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.

AI-011

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.

AI-010

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.

AI-008

The Claude Code Drawbacks

A critical look at the hidden pitfalls of AI-assisted development -- from skipped tests and weakened assertions to scope creep and context rot -- based on real-world experience with Claude Code.

Digital Garden

Engineering, opinions, and deep dives.

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Latest Digital Garden articles
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DG-01117 Side Projects I Built With Claude Code in Two Months

A look at 17 side projects I built in about two months with Claude Code -- from TUI apps in Rust and Go to browser games and AI agent tooling.

DG-010Common React Hooks Antipatterns and Gotchas

Learn about common React Hooks antipatterns and how to avoid them for better code quality.

DG-009The Simplest CSS Grids

Learn the most common CSS Grid layouts with copy-pastable examples for two-column layouts, sidebar navigation, and more.

DG-008Constants vs Enums in TypeScript

TypeScript tips and tricks

AI experiments

Projects, tools, and creative AI work.

Service

AI Workflow Consulting

Helping companies implement AI tools and processes effectively

  • Claude
  • LLMs
  • Prompt Engineering
Article

AI Glossary

Comprehensive glossary of AI terms and concepts

Connect

Projects

Work with me

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

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