David Heinemeier Hansson

speaker

5,915 appearances 4 recordings 4 series first heard Aug 2025 last heard 26 Aug

David Heinemeier Hansson’s voice in public audio — every appearance, attributed to the second.

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recordings per month · last 12 months

Recordings per month over the last 12 months — 3 in all, peaking in Aug 2026 with 1.

Appearances

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Lex Fridman Podcast · #501 – DHH: Future of Programming, AI, Agentic Engineering, Vibe Coding & Linux · 26 Aug 2026 podcast

And I'm seeing that recurrent loop where I started it on, like, this is what I want.

I want you to be able to have these isolated VM workers and so forth.

And then it can do the self-iteration.

Then it starts running it, it starts noticing its failures, it starts optimizing it.

And a lot of that system on a bot in particular.

AI has driven the majority of the design decisions.

Like I had some

Vague ideas of where I wanted.

I wanted to use this brains and hands pattern where the model is running from where the code is executing, which is actually a really interesting pattern.

Again, Toby alerted me to that, where you have a coordinator that runs the model.

But it's manipulating a safe VM where any untrusted code you're pulling down from pull requests or issues or whatever can't contaminate the model.

And even in that loop, I keep seeing it

catch itself spotting vulnerabilities was like, oh, I actually just took some feedback from a test run.

If a clever attacker had embedded

uh malicious payload in the response of the test run that could have polluted something I took it for good take.

I better start treating that as uh as outside data.

And you just go like it is just I get why San Francisco is so obsessed with fast takeoff because clearly they've seen this a hundred times more.

They've seen it with all the models that are in

training now and

We keep getting these little glimpses like the security breach with uh hugging face, where open AI was training this model and the model starts inventing ways essentially sending smoke signals to itself through embedding messages in a package manager where you just go like first, that's damn clever.

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