me-3-cropped.jpg - Paint

Antonin Januska in a black cap and glasses in front of a graffiti brick wall
Antonin, Boulder, Colorado100%

Welcome to AJ/OS

Did you know…

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
Read the writing Work with me Browse UI patterns →

Start Here - 3 hand-picked articles

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.

AI Workflows · 2026-07-09
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.

AI Development · 2026-07-09
The Anatomy Of My Ideal React Component

A walkthrough of my very opinionated React Component.

Engineering · 2022-03-11
3 object(s)Featured

C:\Writing\AI - Explorer

Address
C:\Writing\AI
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Latest AI and machine learning posts
NameModified
I Built an AI-Friendly UI Pattern LibraryEvery pattern ships the prompt that rebuilds it.
2026-08-14
The Future is Bespoke, Personalized SoftwareSeven apps that are 100% right for one person.
2026-07-09
The Local-First App SkillSo every app I build comes out the same shape.
2026-07-09
An Honest Opinion on the State of Code Gen AI, Spring 2026 EditionAgentic harnesses, multi-agent architectures, and what still needs to change.
2026-03-25
I, AI: The Weight of Equal Parts (Part 3)Short story. A lunar mining base's AI starts overassigning crews.
2026-02-27
The Claude Code DrawbacksSkipped tests, weakened assertions, scope creep, and context rot.
2026-02-27
6 object(s)Workflows, tools, and experiments

C:\Writing\Digital Garden

Open Writing folder →

4 object(s)Engineering, opinions, and deep dives

AI Experiments - Control Panel

AI Workflow ConsultingHelping companies implement AI tools and processes effectively Claude Code Best PracticesGuide to effective AI-assisted development AI GlossaryComprehensive glossary of AI terms and concepts I, AI - Short StoriesScience fiction exploring AI themes and futures
4 object(s)Projects, tools, and creative AI work

UI Pattern Library Properties

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

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.

Type:
Pattern library (project)
Built with:
HTML, CSS, JavaScript
Location:
antjanus.com/patterns
Patterns40
Categories5
Dependencies0
Browse the library

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