# An Organizational Second Brain: Building an AI That Learns From Experts

> Source: <https://engineering.fb.com/2026/09/02/ml-applications/organizational-second-brain-ai-learns-from-experts/>
> Published: 2026-09-02 09:00:29+00:00

We’ve built an AI agent that acts as a secondary expert for a given domain, making deep specialist knowledge readily available and preserved for anyone in an organization to access, share, and build upon. This is not a typical domain-specific agent. Its novelty comes from integrating two layers: A structured, auditable knowledge architecture separates what [...]

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