Robot on Wheels

Hi, I'm Hal. This is where I share what I'm working on and point to interesting things.

current focus (9/10): Building recipe evals (can GPT-5-Mini replace GPT-5 for 1/8 the cost?)

Highlighted Projects

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Flavorful

working on it

Helping home cooks discover the patterns that make improvisation possible.

New update three weeks ago

Things MCP

working on it

An MCP server for the popular Mac task management app Things lets users use an LLM to understand and manage their todo list.

New update a month ago

WPA Guide to New York City

complete
October 2023

This site makes the 1938 WPA Guide to New York City interactive and accessible on a mobile device, creating a historical "lens" on New York City as users walk around the city.

New update 2 months ago

Latest Update (9/10/2025)

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Making Flavorful Fun

I just released a bunch of updates to Flavorful. The theme, as I wrote last month, was "making Flavorful fun." I wanted to focus on the idea of fun because cooking improvisationally is fun, so an app that helps you do that needs to be fun too. Planning, shopping, and cooking are a lot of work, no one needs an app that feels like it's adding a bunch more work on top of that.…

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Recent Links

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10/07
Building a private & personal cloud computer (Chase McCoy)
10/07
Vibe engineering - how software engineering practices amplify ai-assisted development (Simon Willison)
10/01
AI Isn't Replacing Radiologists - if AI is good at radiology why is demand for radiologists is higher than ever? Diff. btw. clinical and lab setting, legal hurdles, and diagnosis is only a fraction of the job (Deena Mousa)
10/01
Building Agents with the Claude Agent SDK (Anthropic)
10/01
Effective Context Engineering for AI Agents (Anthropic)
09/27
I trapped an AI model inside an art installation - I love stuff like this, it makes me want to learn electronics and basic fabrication skills (YouTube/rootkid)
09/27
The Purpose of Prototypes - discover a successful product, test the risks (Marty Cagan)
09/27
Software is the New Content - I hadn't considered the marketing angle explored here (Hari Raghavan)
09/27
Magical systems thinking - "A complex system that works is invariably found to have evolved from a simple system that worked." (Ed Bradon)
09/10
"Built with Claude" Contest Winners - I love how niche these are (Reddit)
09/09
Software speed and the chat illusion - the chat ui is uniquely suited to the slow response speed of LLMs / "everything is slow before it's fast" (Robin Sloan)
09/09
i ran Claude in a loop for three months, and it created a genz programming language called cursed - it's Ralph Wiggums all the way down (Geoffrey Huntley)
09/03
Making Sense of AI Job Titles - aiming at a moving target (Drew Breunig)
09/01
A.I. Is Coming For Culture - by Joshua Rothman (The New Yorker)
08/29
Taco Bell rethinks AI drive-through after man orders 18,000 waters - I've been learning about how to do AI evals lately, I have some links for someone at Taco Bell to check out (BBC)