yao

About

Yao is an open-source runtime for building AI agents and web applications — shipped as a single binary.

Think of Yao Agent as a cage, not an animal. What you put inside determines the behavior; the cage keeps it controlled.

Create Hook runs before the executor — inject context, enforce constraints, route requests. Next Hook runs after — validate output, trigger downstream actions, drive multi-step loops. The AI does the heavy lifting. You define the boundaries.

All three share the same Hook interface. You can mix them freely — route some requests through the LLM, handle others with pure code, all inside a single Create Hook.

Yao (爻, yáo) is the fundamental symbol in the I Ching — the…