Antonin Januska

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.

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Antonin in a black cap and glasses in front of a graffiti-covered brick wall
Antonin Januska. Boulder, Colorado.

In numbers

20+

Years building

600+

GitHub stars

2012

Blogging since

Start here

Three pieces worth reading first.

  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 Development ·

    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

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  1. 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. 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.

  3. 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.

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

    A frank assessment of where code generation AI actually stands in 2026 -- from agentic harnesses to multi-agent architectures and what still needs to change.

  5. 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.

  6. Agent Compiler - Embed Skills Directly Into Your Config

    A CLI tool that compiles Claude Code skills into CLAUDE.md and AGENTS.md for more reliable agent behavior.

Digital Garden

Engineering, opinions, and deep dives

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  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

AI Experiments

Projects, tools, and creative AI work

  1. Service · Claude, LLMs, Prompt Engineering

    AI Workflow Consulting

    Helping companies implement AI tools and processes effectively

  2. Article · Claude Code, TypeScript

    Claude Code Best Practices

    Guide to effective AI-assisted development

  3. Article

    AI Glossary

    Comprehensive glossary of AI terms and concepts

  4. Experiment · Creative Writing, AI

    I, AI - Short Stories

    Science fiction exploring AI themes and futures

Work with me

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

Get in touch

Elsewhere

Connect, and a few things I've made