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0.217.0

BoundaryML/baml0.217.0Jan 12, 2026by github-actions[bot]

AI Summary

This release introduces a native Rust SDK and adds Pydantic model description support, along with various bug fixes for error handling and type matching.

Key Highlights

  • Add native Rust SDK
  • Wire @description to Pydantic models Field attribute
  • Fix TimeoutError and InvalidArgumentError raising as BamlError
  • Fix media type matching in unions using file extension heuristics
  • Add abort error details
  • Fix @skip attribute panic with @@dynamic and non-dynamic classes

New Features

  • Native Rust SDK
  • @description attribute mapped to Pydantic Field

Full Release Notes

## [0.217.0](https://github.com/boundaryml/baml/compare/0.216.0..0.217.0) - 2026-01-10


### Features

- Add native Rust SDK (#2832) - ([0b4d81a](https://github.com/boundaryml/baml/commit/0b4d81a3861efe49fc41d58c7464c6ae7388ce8c)) - hellovai
- wire @description to pydantic models Field attribute (#2955) - ([ff4970a](https://github.com/boundaryml/baml/commit/ff4970ac911243ef0f8e314d1c5103391c39d278)) - Sam Lijin

### Bugs
- **(zed)** Fix version (#2953) - ([a9c4d7b](https://github.com/boundaryml/baml/commit/a9c4d7b14fd8024a373c58768f4eb943ec662838)) - Sam Lijin
- fix TimeoutError and InvalidArgumentError getting raised as BamlError (#2954)
- Fix media type matching in unions to use file extension heuristics (#2894) - ([cad717c](https://github.com/boundaryml/baml/commit/cad717cf310678fdad8dea38b708262211c764f6)) - Antonio Sarosi
- [Studio] Dont resend the prompt and raw output via BamlValidationError published events (#2914) - ([85a3b35](https://github.com/boundaryml/baml/commit/85a3b35a0ea99980ac0fc2d29b2a1b616bfb9a41)) - aaronvg
- add abort error details (#2921) - ([9172fbc](https://github.com/boundaryml/baml/commit/9172fbcea6405917fd751f519366ffd180d673c1)) - aaronvg
- Fix backwards type checking in Jinja filter validation (#2942) - ([e903222](https://github.com/boundaryml/baml/commit/e903222a92d5993af33e02fa41b518a50b94b4ab)) - Kelvin
- Add on_tick callback tests and fix CFFI streaming callback handling (#2949) - ([db206db](https://github.com/boundaryml/baml/commit/db206dbb192bd1061438835173f2795a39c67de7)) - hellovai
- Fix @skip attribute panic with @@dynamic and non-dynamic classes (#2952) - ([ae13652](https://github.com/boundaryml/baml/commit/ae136524eff94bb364c0086e89569e3c47bc2e5d)) - Antonio Sarosi