Welcome to AntJanus, the personal encyclopedia of 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.
20+ years building · 600+ GitHub stars · blogging since 2012 · 33 articles · 40 patterns
From today's featured article
The Future is Bespoke, Personalized Software is an essay in the AI collection, published July 9, 2026. 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. Its companion piece, The Local-First App Skill, is the blueprint those apps share. (Full article…)
Recently featured: The Local-First App Skill · The Anatomy Of My Ideal React Component
Recently published
In AI
- I Built an AI-Friendly UI Pattern Library 2026-08-14
- The Future is Bespoke, Personalized Software 2026-07-09
- The Local-First App Skill 2026-07-09
- An Honest Opinion on the State of Code Gen AI, Spring 2026 Edition 2026-03-25
- I, AI: The Weight of Equal Parts (Part 3) 2026-02-27
- The Claude Code Drawbacks 2026-02-27
In the Digital Garden
- 17 Side Projects I Built With Claude Code in Two Months 2026-02-23
- Common React Hooks Antipatterns and Gotchas 2026-01-08
- The Simplest CSS Grids 2026-01-08
- Constants vs Enums in TypeScript 2024-03-13
Did you know…
- … that Antonin's Vim configuration ended up featured in the video game Watch Dogs 2?
- … that the fishing game (pictured) he built with a kid runs entirely from a single .html file?
- … that cc-dash has no database, because the markdown files are the source of truth and git is the audit log?
- … that every entry in the UI pattern library ships the prompt that rebuilds it from scratch?
- … that the I, AI short stories were written entirely by hand, without any AI assistance?
- … that Programmer's Proverbs went viral and passed 680 stars?
AI experiments
- AI Workflow Consulting (service)Helping companies implement AI tools and processes effectively.
- Claude Code Best Practices (article)Guide to effective AI-assisted development.
- AI Glossary (article)Comprehensive glossary of AI terms and concepts.
- I, AI - Short Stories (experiment)Science fiction exploring AI themes and futures.
Work with me
I help companies implement AI workflows and accelerate their development teams.
Get in touch →Selected projects
What I'd show you first
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.
HTML · CSS · JavaScript
Browse the library
More open source
| Name | Description | Tech | Stars |
|---|---|---|---|
| Programmer's Proverbs | A collection of proverbs from the programmer. Went viral with hundreds of stars and contributions from the community. | Markdown | 680 |
| My Dotfiles | Personal VIM/Neovim configuration that ended up featured in the video game Watch Dogs 2. | Vim, Shell | 47 |
| Tseczka CSS Framework | A lightweight CSS framework focused on simplicity and clean design. | CSS | 38 |
| Babel Plugin Namespaces | A Babel plugin that adds JavaScript namespace support for cleaner code organization. | JavaScript, Babel | 18 |
| Popstar CMS | A file-based content management system built on Node.js for simple, flat-file websites. | Node.js, JavaScript | 12 |
Elsewhere on the web
GitHubProgrammer's Proverbs (600+ stars), Cottage UI, cc-dash, Skillbox.
YouTubeAI and dev videos, React tutorials.
LinkedInProfessional profile.
Cottage UIReact library built on a YouTube series.