Andreessen: Modern AI agents are simply LLMs combined with Unix primitives
Marc Andreessen · Marc Andreessen introspects on Death of the Browser, Pi + OpenClaw, and Why "This Time Is Different" · Apr 3, 2026 · at 36:16
Marc Andreessen (a16z) explains how open-source systems like Pi and OpenClaw architect autonomous agents using classic Unix modular design principles.
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“So it turns out what we now know is an agent is the following. It's a language model. And then above that, it's a bash. It's a bash shell. So it's a Unix shell. And then the agent has access to the shell and, you know, hopefully in a sandbox, maybe in a sandbox. So it's the model. It's the shell. And then it's a file system. And then the state is stored in files. And then, you know, there's the markdown format for the, you know, for the files themselves. And then there's basically what in Unix is called a cron job. There's a loop. And then there's a heartbeat. There's a heartbeat. And the thing basically wakes up. So it's basically LLM plus shell plus file system plus markdown plus cron. And it turns out that's an agent.”
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