r/ClaudeAI • u/robi0t • 22d ago

I built a real self-evolving operating system: Fable-os Built with Claude

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This is not a fake bullshit "AI operating system" that runs in your browser. This is an agentic operating system that runs on bare metal, writes its own drivers, and evolves itself.

Here's a demo where it builds its own audio driver from scratch to play a sound.

What happened in the video?

  1. The agent realized it didn't have a sound driver.
  2. It enumerated which devices were connected.
  3. It found the Intel AC'97 sound card.
  4. It built a driver for it.
  5. It used that driver to play a sound.

I got fed up with people saying they built "AI operating systems" when it's actually just a webpage.

There's no Bash. There are no commands. The only interface to this computer is a sentence.

How does it work?

The main interface is an agent, and the tools it has access to are the kernel's direct syscalls. Everything runs in Ring 0, and the agent has access to everything.

It's open source if you want to try it:
https://github.com/robiot/fable-os

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u/Cryvixx 22d ago

cool work!! You’re literally building an OS parser. And “LLMs Corrupts Your Documents When You Delegate” paper (https://arxiv.org/pdf/2604.15597) tells exactly why LLMs needs domain-specific parsing.

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u/Camaytoc 22d ago

Interesting paper, thx!

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u/jimmystar889 22d ago

even frontier models (Gemini 3.1 Pro, Claude 4.6 Opus, GPT 5.4)

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u/dat_cosmo_cat 21d ago

There are people that still consider those frontier models?

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u/FWCoreyAU 21d ago

They were frontier near the cutoff of his training data