Boundary

It enables authoring BAML definitions: statically typed, expression-oriented model functions with snake_case methods, structured outputs, and evals. Teams can express function contracts, generate deterministic calls, and check behavior changes during development without leaving the BAML language model.

Backend engineers, platform engineers, and applied model engineers who need typed contracts around model calls should use it. It fits teams maintaining production services where schemas, eval coverage, and versioned function behavior matter more than ad hoc prompt strings.

Add the baml-core skill, write BAML files with typed functions, then compile with the pinned toolchain version 0.18.1-nightly.20260906.a. Use the generated artifacts in your service path and run evals before promoting changes to shared environments.

The provided manifest does not state a license, repository terms, or price. Treat licensing and cost as unverified until Boundary's repository or boundaryml.com is checked directly. The only confirmed metadata is the BAML toolchain nightly version.

You need the BAML toolchain matching 0.18.1-nightly.20260906.a, a project that can store BAML definitions, and runtime access to the model endpoints referenced by those functions. No other dependency, package manager, or framework is named in the manifest.