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.
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.
- AI guides & workflows
- Digital Garden essays
- Demystifying Tools
- I, AI fiction
- Projects
20+Years building
600+GitHub stars
2012Blogging since
Start here
Three pieces I would hand a new reader 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.
aiclaude-codelocal-firstside-projects
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.
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.AI
- 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.AI
- 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.AI
- 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.AI
- Feb 27, 2026When 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.I, AI · Part 3
- 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.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.
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
Projects, tools, and creative AI work
AI Workflow Consulting
Helping companies implement AI tools and processes effectively
Claude · LLMs · Prompt Engineering
Projects
Worth a look
Work with me
Ship AI workflows that hold up.
I help companies implement AI workflows and accelerate their development teams.