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Tosijs-schema is a super lightweight schema-first LLM-native JSON schema library

Tosijs-schema is a super lightweight schema-first LLM-native JSON schema library

3 comments

·November 23, 2025
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podperson

I wrote this library this weekend after realizing that Zod was really not designed for the use-cases I want JSON schemas for: 1) defining response formats for LLMs and 2) as a single source of truth for data structures.

7thpower

What led you to that conclusion?

nerdponx

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