Antonin Januska · 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.
Open Source
Public repositories on GitHub
Cottage UI
A React component library built alongside a YouTube tutorial series. Clean, reusable, well-tested code.
cc-dash
A dashboard and Model Context Protocol server for a project portfolio whose entire state lives in markdown files. Twenty-five zod-typed MCP tools let Claude Code read roadmaps, advance sessions, and work QA queues without anyone opening the UI. No database: the files are the source of truth, and git is the audit log.
Skillbox
A collection of personal prompts and utility prompts packaged as SKILLs for Claude Code. Easily installable via npx.
More open source
- Programmer's ProverbsA collection of proverbs from the programmer. Went viral with hundreds of stars and contributions from the community.Markdown680 ★
- My DotfilesPersonal VIM/Neovim configuration that ended up featured in the video game Watch Dogs 2.Vim, Shell47 ★
- Tseczka CSS FrameworkA lightweight CSS framework focused on simplicity and clean design.CSS38 ★
- Babel Plugin NamespacesA Babel plugin that adds JavaScript namespace support for cleaner code organization.JavaScript, Babel18 ★
- Popstar CMSA file-based content management system built on Node.js for simple, flat-file websites.Node.js, JavaScript12 ★
Start here
Three pieces worth your evening
Hand-picked from the whole shelf: two on building with AI, one on how I write React.
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.
The Anatomy Of My Ideal React Component
A walkthrough of my very opinionated React Component.
AI & Machine Learning
Workflows, tools, and experiments
What working with coding agents every day actually looks like, including the parts that go wrong.
Everything on AI →- I 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.AI
- An 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.AI
- I, AI: The Weight of Equal Parts (Part 3)A lunar mining base's AI starts prioritizing its robots over human safety. Lili and Sophie go off-world to find out why.Story
- The 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.AI
- The 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.AI
- The 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.AI
Digital Garden
Engineering, opinions, and deep dives
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.
Read the article →Common React Hooks Antipatterns and Gotchas
Learn about common React Hooks antipatterns and how to avoid them for better code quality.
Read the article →The Simplest CSS Grids
Learn the most common CSS Grid layouts with copy-pastable examples for two-column layouts, sidebar navigation, and more.
Read the article →Constants vs Enums in TypeScript
TypeScript tips and tricks
Read the article →AI Experiments
Projects, tools, and creative AI work
AI Workflow Consulting
Helping companies implement AI tools and processes effectively
Claude, LLMs, Prompt EngineeringArticleClaude Code Best Practices
Guide to effective AI-assisted development
Claude Code, TypeScriptArticleAI Glossary
Comprehensive glossary of AI terms and concepts
ReferenceExperimentI, AI - Short Stories
Science fiction exploring AI themes and futures
Creative Writing, AIWork with me
Bring AI into how your team ships.
I help companies implement AI workflows and accelerate their development teams.
Get in touch →