AntJanusHerbarium · Boulder, Colo.
Antonin Januska in a black cap and glasses in front of a graffiti brick wall
Herb. AntJanusNo. 001
Antoninus januska
Hab.
Boulder, Colorado
Det.
Staff Engineer
Coll.
Blogging since 2012

Tab. I · Hortus Antjanus

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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20+Years building
600+GitHub stars
2012Blogging since
Read the writing Work with me Browse UI patterns →

Specimina typica

Start here

The type specimens: three pieces that define what this garden grows.

Typus · AI Workflows

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.

AJ-031Seedling
Fam.
Machina cogitans
Date
 Typus · AI Development

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.

AJ-032Seedling
Fam.
Machina cogitans
Date
 Typus · AI

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.

AJ-033Seedling
Fam.
Machina cogitans
Date

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Machina cogitans

AI & Machine Learning

Workflows, tools, and experiments

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Tab. I

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.

AJ-033Seedling
Fam.
Machina cogitans
Date
 Tab. II

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.

AJ-031Seedling
Fam.
Machina cogitans
Date
 Tab. III

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.

AJ-032Seedling
Fam.
Machina cogitans
Date
 Tab. IV

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.

AJ-030Seedling
Fam.
Machina cogitans
Date
 Fabula III

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, 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.

AJ-027Seedling
Fam.
Fabulae machinae
Date
 Tab. VI

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.

AJ-028Seedling
Fam.
Machina cogitans
Date

Hortus digitalis

Digital Garden

Engineering, opinions, and deep dives

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  1. No. 01

    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.

    Hortus digitalisSeedling
  2. No. 02

    Common React Hooks Antipatterns and Gotchas

    Learn about common React Hooks antipatterns and how to avoid them for better code quality.

    Hortus digitalisSeedling
  3. No. 03

    The Simplest CSS Grids

    Learn the most common CSS Grid layouts with copy-pastable examples for two-column layouts, sidebar navigation, and more.

    Hortus digitalisSeedling
  4. No. 04

    Constants vs Enums in TypeScript

    TypeScript tips and tricks

    Hortus digitalisBudding

Semina

AI Experiments

Projects, tools, and creative AI work

Service

AI Workflow Consulting

Helping companies implement AI tools and processes effectively

Claude, LLMs, Prompt Engineering Article

Claude Code Best Practices

Guide to effective AI-assisted development

Claude Code, TypeScript Article

AI Glossary

Comprehensive glossary of AI terms and concepts

Reference Experiment

I, AI - Short Stories

Science fiction exploring AI themes and futures

Creative Writing, AI

Epistulae

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Opera

Projects

Consilium

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I help companies implement AI workflows and accelerate their development teams.

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