Cottage UI
A React component library built alongside a YouTube tutorial series. Clean, reusable, well-tested code.
ReactTypeScript 13GitHub → Cottage UI
Antonin Januska · Staff Engineer · Boulder, CO
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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Three pieces worth your first ten minutes
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
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.
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.
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.
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, Lili and Sophie are sent off-world.
Digital Garden
Engineering, opinions, 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.
Common React Hooks Antipatterns and Gotchas
Learn about common React Hooks antipatterns and how to avoid them for better code quality.
The Simplest CSS Grids
Learn the most common CSS Grid layouts with copy-pastable examples for two-column layouts, sidebar navigation, and more.
Constants vs Enums in TypeScript
TypeScript tips and tricks
AI Experiments
Projects, tools, and creative AI work
AI Workflow Consulting
Helping companies implement AI tools and processes effectively
ServiceClaudeLLMsPrompt EngineeringClaude Code Best Practices
Guide to effective AI-assisted development
ArticleClaude CodeTypeScriptAI Glossary
Comprehensive glossary of AI terms and concepts
ArticleI, AI - Short Stories
Science fiction exploring AI themes and futures
ExperimentCreative WritingAIOpen Source
Public repositories on GitHub
Photo Importer
Photo organization TUI with video sorting support. Organizes photos into year/month/date folders. Built a TUI around the original script for a better workflow.
PythonTUIGitHub → Photo Importer
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.
TypeScriptNext.jsMCPzodGitHub → cc-dash
Skillbox
A collection of personal prompts and utility prompts packaged as SKILLs for Claude Code. Easily installable via npx.
Claude CodeSKILLsGitHub → Skillbox
Agent Compiler
A TUI for embedding skills into a CLAUDE.md file so Claude has a higher chance of picking them up.
TUIClaude CodeGitHub → Agent Compiler
More open source
Programmer's Proverbs
680A collection of proverbs from the programmer. Went viral with hundreds of stars and contributions from the community.
MarkdownGitHub → Programmer's Proverbs
My Dotfiles
47Personal VIM/Neovim configuration that ended up featured in the video game Watch Dogs 2.
VimShellGitHub → My Dotfiles
Tseczka CSS Framework
38A lightweight CSS framework focused on simplicity and clean design.
Babel Plugin Namespaces
18A Babel plugin that adds JavaScript namespace support for cleaner code organization.
JavaScriptBabelGitHub → Babel Plugin Namespaces
Popstar CMS
12A file-based content management system built on Node.js for simple, flat-file websites.
Node.jsJavaScriptGitHub → Popstar CMS
Work with me
Bring AI into how your team actually ships.
I help companies implement AI workflows and accelerate their development teams.
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