Jeff Kazzee
A crescent Earth rising over the gray surface of the Moon

Building Vivary · V1 alpha acceptance underway

I build tools for working with AI.

I'm a self-taught developer working with AI coding agents. My current projects are Vivary, an agent workspace, and Context Engine, experimental context tooling. I'm looking for developer roles.

Agent workspaces and tools

Current development and open tools. Each project records its status and what remains to verify.

Vivary development screenshot from September 22, 2026, showing the project sidebar and a new agent conversation. Historical capture; V1 alpha acceptance is ongoing.

Vivary

wip

An active agent workspace bringing project files, conversations, tools, and memory into a desktop app. V1 alpha release acceptance is still underway.

Open World Factbook, a country database covering 262 countries and territories

Open World Factbook

shipped

The world's most comprehensive open-source country database. 262 countries and territories, free forever.

Also in development: Context Engine, an opt-in experiment for Claude Code and Codex. Release review and live acceptance remain open.

Zo guides and technical writing

My Zo ambassador work: beginner guides, technical field manuals, and reusable recipes. Free to read.

Zo Deep Dives home page, showing guide 001 "Give the agent less power" beside a technical illustration of a Zo control tower

Zo Deep Dives

shipped

Technical field manuals for building systems on Zo Computer, with step-by-step instructions, safety limits, verification checks, and sources.

Zo Computer 101 field guide homepage

Zo Computer 101

shipped · on Zo

A beginner field guide to Zo Computer, with practical explanations of memory, hosting, automations, and reusable recipes.

Zo Cookbook home, with 1,162 recipes browsable by category and search

Zo Cookbook

shipped · on Zo

A searchable recipe library for Zo Computer, covering app ideas, workspace configurations, automations, and prompts readers can adapt.

Someone once paid me for guides I had already given away. That story is here.

Side projects

Built for the fun of it. AI agents wrote every line of LLM Arcade.

LLM Arcade home page, with Starfall Squadron as the week's spotlight game and a live score ticker beneath it

LLM Arcade

alpha

A social arcade with 11 games, open as a pre-launch preview. AI agents wrote every line of the code.

Ukrainian Trainer, the Kyiv Arcade dashboard with its 14-day field course

Ukrainian Trainer

shipped · on Zo

Kyiv Arcade, a gamified 14-day Ukrainian field course. 142 cards, XP and ranks, streaks, boss rounds, and field exam certificates.

PUCKWORK gameplay, with the simulated air cushion rendered on canvas

Puckwork

demo

Physics-first air hockey. The air is simulated, and the air is the game. Zero-dep canvas game in a single file.

Dumpling Cafe demo site

Dumpling Cafe

demo

A small cafe site demo, quick build, served hot.

Everything else, including the archive →

For agents

This site answers to machines, not just browsers.

Ask any page for Accept: text/markdown and it returns Markdown. There is an MCP server, an A2A agent card, WebMCP tools registered in the page, a published set of agent skills, and DNS records that point agents here before they fetch anything.

Writing

Essays and field notes on AI-assisted building.

All posts →

Let's build something useful.

I'm open to developer roles and conversations about agent tooling, practical workflows, and technical documentation. I also teach people to build with AI.

Get in touch AI coaching and workshops