Antonin Januskaantjanus.com
New40 UI patterns, each with the prompt that rebuilds it

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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Years building20+Startups to staff engineering
GitHub stars600+Mostly Programmer's Proverbs
Blogging since201214 years of posts
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Three posts worth your first ten minutes

AI & Machine Learning

Workflows, tools, and experiments

View all 12
AI-012
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
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
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-009
AI-009

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.

AI-008
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.

IAI-3
IAI-3

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 Experiments

Projects, tools, and creative AI work

Featured project

What I'd show you first

HTML · CSS · JavaScript

UI Pattern Library

Interface patterns lifted out of projects I actually shipped. Each one renders live in an isolated frame and comes with its markup, its styles, its behaviour, and the prompt that rebuilds it from scratch.

Patterns40
Categories5
Dependencies0
A blueprint drawing of interface parts: dialled gauges, dimensioned panels, and a grid of repeated tiles

Connect, projects, and work with me

Work with me

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

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