Codex Blocks Fast Mode with an API Key on Desktop
I ran a matrix of Codex configurations to find out why Fast mode works in the CLI but not in the Desktop app with an API key.
Andrew Denta
Writing.
Latest posts
AI on the Lot Portfolio
An overview of my work with Seedance 2
Putting AI Agents in Production
Ok, so. You want to build autonomous virtual employees that can take a long-running, complex task and run with it, checking in when they need approval.
Artificial Ruby NYC Talk
On February 18, 2026, I spoke at Artificial Ruby in New York City about building realtime AI agents in Ruby, using my open source Pokemon-playing project to show where agent systems get interesting.
Context Engineering Is Only Half the Battle
Why scaffolds matter just as much as context engineering when you want reliable self building software.
Claude Plays Pokemon Hackathon at Latent Space
On April 5, 2025, I joined Latent Space in San Francisco to talk through the Ruby-based Pokemon-playing agent I had been building, why emulator integration was the real bottleneck, and why I was happy to cheat with RAM reads when computer vision got in the way.
Florida
Because California is Too Cold
Not every startup needs a CTO
Learnings from a founding engineer
5 takeaways from doing AI diligence in healthcare
I spent some time doing AI diligence in healthcare and came away with a handful of opinions that feel more durable than any one company or demo.
Winning the A.Team Generative AI Hackathon
We built JAY in a weekend and won A.Team's first Generative AI Hackathon.
Terusama (YC W20) to Velostics
InnovationMap covered the Velostics acquisition this week. For the full story, go check out their article.