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0.218.0

BoundaryML/baml0.218.0Jan 22, 2026by github-actions[bot]

AI Summary

This release focuses on bug fixes across multiple languages including Go, TypeScript, and React. Key improvements address dynamic type handling, streaming format changes, and enhanced error hierarchies.

Key Highlights

  • Fix Go serde decoding for dynamic types and pure-dynamic classes
  • Wrap CFFI result and error callbacks in block_in_place for better concurrency
  • Handle optional image encoding in Go types
  • Use NDJSON format for React streaming to handle TCP chunk boundaries
  • Add BamlError base class and improve TypeScript error hierarchy

New Features

  • NDJSON streaming format for React client
  • BamlError base class with improved error hierarchy in TypeScript

Full Release Notes


## [0.218.0](https://github.com/boundaryml/baml/compare/0.217.0..0.218.0) - 2026-01-22

### Bug Fixes
- Fix Go serde decoding for dynamic types (#2978) - ([f3e48fd](https://github.com/boundaryml/baml/commit/f3e48fdc3f5f686b10ba6fa2638495ca7539fcee)) - hellovai
- Fix Go codegen for pure-dynamic classes (@@dynamic with no static fields) (#2995) - ([dcc2323](https://github.com/boundaryml/baml/commit/dcc2323639ac5b5ad777dd935f2527a3b6b97b41)) - hellovai
- **(cffi)** wrap result and error callbacks in block_in_place (#2989) - ([c31ae86](https://github.com/boundaryml/baml/commit/c31ae8666c3d1a4e26d046cd6aa5b58ffc37ca18)) - Tsvetomir Bonev
- **(go)** handle optional image encoding (*types.Image) (#2996) - ([d3d76dc](https://github.com/boundaryml/baml/commit/d3d76dc7634472d3673ea88a3913b938c7ea99d0)) - hellovai
- **(react)** use NDJSON format for streaming to handle TCP chunk boundaries (#3000) - ([d4edca7](https://github.com/boundaryml/baml/commit/d4edca77c6bf7e9f2e7d898082adc4093ced7e01)) - Antonio Sarosi
- **(ts)** add BamlError base class and improve error hierarchy (#2993) (#3012) - ([807e702](https://github.com/boundaryml/baml/commit/807e702e8dfd8caff3acd23e4865e2b7701ced5d)) - Antonio Sarosi

- fix playground index on test history (#3005)
- Fix API key dialog not showing for new users (#2999) - ([6cb3b60](https://github.com/boundaryml/baml/commit/6cb3b60efe8eb2b2fcb7a37cdf9e0a479ad41b42)) - Paulo Rossi Rodrigues