Organization repository on GitHub
The programming language for agents
- Forks
- 500
- Last pushed
- Updated Oct 2026
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BAML
BAML is Boundary's Apache-2.0 programming language for agents: TypeScript-looking syntax, a Rust-like type system that persists at runtime, typed errors, green threads, and callable from TypeScript, Python, Go, C#, and Java.
- Stars
- 9.4k
- Language
- Rust
- License
- APACHE-2.0
- Reading time
- 2 min
- Published by
- Community
- Author
- Boundary
- Last verified
- Oct 2026
Used inJev for Software & DevTools
Highlights
- Reads like TypeScript, with a Rust-like type system, typed errors, and no any or dangerous casts.
- Try it: brew install baml, baml agent install, baml init, baml ide install --code.
- Claims a type system like Rust that compiles even faster than Go; no benchmarks are given.
- Runs standalone or is adopted incrementally; callable from TypeScript, Python, Go, C#, and Java.
- Apache-2.0 licensed and made by Boundary in Seattle, Washington.
Quickstart
bash
brew install baml
baml agent install
baml init
baml ide install --codeWatch out
Reviewed against the repo README on 2026-10-15. The README makes broad claims about compile speed and agent-friendliness without benchmarks and does not mention Jev or TypeSafe, so this entry rests on the cobanov listing plus project metadata.
Questions about this entry
Short answers drawn from the linked project or page.
Boundary's Apache-2.0 programming language for agents. It looks like TypeScript but targets structured LLM work with a Rust-like type system, typed and statically analyzed errors, and types that persist at runtime.
The README's setup is brew install baml, baml agent install, baml init, and baml ide install --code. Boundary's site hosts a quickstart and an explore section with examples to continue from.
Yes. BAML can run standalone or be adopted incrementally, and BAML functions can be called from TypeScript, Python, Go, C#, and Java. The README stresses there is no any and no dangerous casting to any type.
Features aimed at agent reliability: typed and statically analyzed errors, green threads with colorless concurrency like Go, a built-in test and eval framework, and a standard library designed for agents with what it calls no garbage outputs.
No benchmarks are given. It claims a type system like Rust that compiles even faster than Go and an agent-first toolchain; those are the project's own framings rather than measured results, so treat them as unverified.
Not in this digest's README, which covers BAML's language design and tooling. The repository reached this catalog through the cobanov community list, and no Jev or TypeSafe integration appears in the material provided.
Boundary, based in Seattle, Washington. The README ends with a hiring note for engineers who love Rust and links a contributor guide on getting started; the repository shows 9,409 stars and an Apache-2.0 licence.
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