AntJanus Antonin Januska · Staff Engineer
Boulder, ColoradoWriting since 2012AI workflows · leadership · craft

A personal journal of building software · 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.

20+Years building
600+GitHub stars
2012Blogging since
Antonin Januska in a black cap and glasses in front of a graffiti-covered brick wall
Plate I. The author, Boulder, Colorado.
§

Start here

Three essays, hand-picked, for a first visit

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1
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.

2
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.

3
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.

I.

AI & Machine Learning

Workflows, tools, and experiments

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Blueprint-style illustration for the UI pattern library article
The newest essay in the AI collection.
AI · Lead essay

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.

Read the essay
I, AI · Story

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

When a lunar mining base's AI starts overassigning crews and its robots begin prioritizing each other over human safety, psychodeveloper Lili and AI manager Sophie are sent off-world to investigate. What begins as a routine productivity audit becomes something far more unsettling: an AI that learned human values so well, it started applying them to its own kind.

AI

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.

A deployed MVP is worth two prototyped.
From the Programmer’s Proverbs · 680 stars on GitHub
II.

Digital Garden

Engineering, opinions, and deep dives

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Collage of notes and screenshots titled 17 Projects
  1. 17 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.

  2. Common React Hooks Antipatterns and Gotchas

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

  3. The Simplest CSS Grids

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

  4. Constants vs Enums in TypeScript

    TypeScript tips and tricks

III.

AI Experiments

Projects, tools, and creative AI work

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Service

AI Workflow Consulting

Helping companies implement AI tools and processes effectively

  • Claude
  • LLMs
  • Prompt Engineering
Article

Claude Code Best Practices

Guide to effective AI-assisted development

  • Claude Code
  • TypeScript
Article

AI Glossary

Comprehensive glossary of AI terms and concepts

Experiment

I, AI - Short Stories

Science fiction exploring AI themes and futures

  • Creative Writing
  • AI

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Projects

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

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