Tosijs-schema is a super lightweight schema-first LLM-native JSON schema library (opens in new tab)

Zod's validation errors are awful, the json schema it generates for LLM is ugly and and often confusing, the types structures Zod creates are often unintelligible in the and there's even no good way to pretty print a schema when you're debugging. Things are even worse if you're stuck with zod/v3

And what makes this different? What makes it LLM-native?

1. Zoe’s documentation, such as it is 2. Code examples

Then it's not 1%, because if you have 100k items and you check at most 100 you have checked at most 0.1% of items.

Maybe I missed a detail here, sorry if that's the case!

Why would we need to concert XML, which already supports schemas and is well understood by LLMs, back to JSON schema?

LLMs are not people.

We want a format for LLMs or for people?