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Compact schema definition: StructLM uses a proprietary object notation that is more compact and is more token-efficient than JSON schemas.

Clear and readable: StructLM's schema definition is human-readable, and is more similar to natural TypeScript syntax. See SPECIFICATION.md for the full specification.

No accuracy loss: Despite being more compact, StructLM does not lose any accuracy when generating structured output, when compared to JSON schemas. See BENCHMARKS.md for more details on our benchmarks.

A: While StructLM is inspired by Zod's API, it's specifically designed for LLM integration. StructLM generates compact schema descriptions optimized for AI prompts (XX% fewer tokens), while Zod focuses on general TypeScript validation. StructLM's .stringify() method produces LLM-friendly output, whereas Zod employs zod-to-json-schema or equivalent tools.

A: Yes! StructLM mostly works for standard TypeScript data validation. Use .parse() for validation and type inference just like Zod. However, StructLM's main advantage is its token-efficient LLM integration capabilities. Therefore, some of the more advanced Typescript features like discriminated unions, recursive types, etc. may not work as expected right now.

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