

i80 Agent.
i80 Agent is a platform for building private knowledge agents: AI that knows your own stories, documents, or expertise.
Where it started: my first project with LLMs, later rebuilt with AI writing the code.
Learn morei80 is named after Interstate 80: one road, many destinations. Exploring AI is my road. Along it, I build apps and AI agents to find out what AI makes possible. Every project here started as an idea, and some are ready for you to use.
Each one has its own look and its own home. All of them came out of the same journey of exploring AI.


i80 Agent is a platform for building private knowledge agents: AI that knows your own stories, documents, or expertise.
Where it started: my first project with LLMs, later rebuilt with AI writing the code.
Learn moreShow me the itinerary for my trip.
Trovel is a trip companion app for planning trips, traveling together, sharing expenses, and keeping the memories. Use it on the web or as an iPhone app.
It's my first app built with AI from the ground up.
Learn moreRetirement Planner plans spending that follows your life and your markets, not a fixed 4% rule. It covers Social Security, Medicare, Roth conversions, and taxes, and every number comes from tested calculators.
Started when I used AI to plan our own retirement. A personal tool for now; I'm exploring opening it to others.
Learn morePickleball Together is a cooperative way to play pickleball: you score together, with fewer risky shots and more fun.
My wife and I play almost every day, for fun and exercise. Regular scoring always made one of us lose, so we created a new scoring rule: the longer the rally, the more points we earn together.
Learn more
Dynasign, the company I co-founded, has provided a cloud-based digital signage service to large organizations for more than 20 years.
Its software runs screens for campuses, cities, restaurants, and businesses.
QRSign is Dynasign's new product for small businesses.
QRSign is digital signage with a QR code on every screen, so people can scan it and take the content with them on their phone.
We're using AI to help power QRSign's marketing and support, and I'm coding it with AI and developing MCP support so AI assistants can work with it.
Learn moreGate-Driven Development is a practical playbook for building real apps with AI. The AI does the engineering, and you approve each step at five gates: the spec, the prototype, the design, the finished build, and the release.
A process I came up with while building i80 Agent with AI, and keep refining with each project.
Learn moreOne question that a very smart AI could not answer.
"How did Alex cook sea bass with miso?""I don't have access to Alex's personal cooking history."
That was ChatGPT in January 2023. It knew everything about cooking, and nothing about my cooking. So I set out to build an agent that knows my stories.
That question led to i80 Agent, and to everything else on this page.
Read how it startedWhat I learn along the way: building with AI, agents, and retrieval.