Antonin Januska · Staff Engineer · Boulder, Colorado
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.
How to read this site
Four voices, two fonts
Every collection speaks in its own position on the type axes. Once you know the voices, a title tells you where it lives before you read the label.
Workflows, tools, and experiments. Set casual: brush-stroke forms for thinking out loud.
CASL 1 · MONO 0 Digital GardenEngineering, opinions, and deep dives. Set linear: flat, open, built for long reading.
CASL 0 · MONO 0 Demystifying ToolsCommand-line walkthroughs. Set monospace, the way the tools print.
CASL 0 · MONO 1 I, AI storiesShort fiction about machine minds. Set cursive, leaning into the page.
slnt −14 · CRSV 1Start here
Three to read first
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.
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.
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.
Casual voice
AI & Machine Learning
Workflows, tools, and experiments
- Aug 14, 2026I Built an AI-Friendly UI Pattern LibraryA 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.
- Jul 9, 2026The Future is Bespoke, Personalized SoftwareEvery 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.
- Jul 9, 2026The Local-First App SkillA 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.
- Mar 25, 2026An Honest Opinion on the State of Code Gen AI, Spring 2026 EditionA frank assessment of where code generation AI actually stands in 2026 — from agentic harnesses to multi-agent architectures and what still needs to change.
- Feb 27, 2026I, 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.
- Feb 27, 2026The Claude Code DrawbacksA 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.
Linear voice
Digital Garden
Engineering, opinions, and deep dives
- Feb 23, 202617 Side Projects I Built With Claude Code in Two MonthsA 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.
- Jan 8, 2026Common React Hooks Antipatterns and GotchasLearn about common React Hooks antipatterns and how to avoid them for better code quality.
- Jan 8, 2026The Simplest CSS GridsLearn the most common CSS Grid layouts with copy-pastable examples for two-column layouts, sidebar navigation, and more.
- Mar 13, 2024Constants vs Enums in TypeScriptTypeScript tips and tricks
Projects, tools, and creative AI work
AI Experiments
AI Workflow Consulting
Helping companies implement AI tools and processes effectively
Claude · LLMs · Prompt Engineering ArticleClaude Code Best Practices
Guide to effective AI-assisted development
Claude Code · TypeScript ArticleAI Glossary
Comprehensive glossary of AI terms and concepts
ExperimentI, AI - Short Stories
Science fiction exploring AI themes and futures
Creative Writing · AIWork with me