JSON to TypeScript / Zod / Python / Rust

Types are inferred from the sample: array elements are merged into their union, and a field missing from some elements becomes optional. Fields that never appear cannot be inferred.

When the root is an array of objects, the element type becomes the root: pasting an array means you want the element shape, not another wrapper.

An empty array gives no element type, so it becomes unknown. Adding one sample item makes the output much more accurate.

Field names follow each language: snake_case for Python and Rust, unchanged for TypeScript. Rust keeps the original key via serde rename so deserialization still works.