BAML language for highlight.js

A highlight.js third-party language definition for BAML, published as @boundaryml/baml-highlightjs.

It highlights the full BAML surface: declaration blocks (class, enum, interface, function, client<llm>, generator, retry_policy, template_string, test, testset), expression bodies (let / const / if / match / for / while / spawn / defer / watch), attributes (@alias(...), @@dynamic), env.VAR references, and all BAML string forms — including Jinja {{ ... }} / {% ... %} markup inside #"..."# prompt bodies and ${ ... } interpolation inside backtick strings.

Install

npm install highlight.js @boundaryml/baml-highlightjs

highlight.js (v11) is a peer dependency.

Usage

import hljs from "highlight.js/lib/core"; // or "highlight.js" for the full build
import baml from "@boundaryml/baml-highlightjs";

hljs.registerLanguage("baml", baml);

const { value } = hljs.highlight(code, { language: "baml" });

Code fences tagged baml then highlight with any hljs-based renderer (markdown-it, marked-highlight, rehype-highlight, ...), as long as the language is registered first.

CDN

The package ships a plain ES module, so it works directly from an ESM CDN — no build step:

<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/highlight.js@11/styles/github-dark.min.css" />
<script type="module">
  import hljs from "https://cdn.jsdelivr.net/npm/highlight.js@11/+esm";
  import baml from "https://cdn.jsdelivr.net/npm/@boundaryml/baml-highlightjs/+esm";

  hljs.registerLanguage("baml", baml);
  hljs.highlightAll();
</script>

Browser / bundled builds

For the classic (non-module) highlight.js build, dist/baml.js self-registers the language on the global hljs — load it after highlight.js:

<script src="https://cdn.jsdelivr.net/npm/@highlightjs/cdn-assets@11/highlight.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/@boundaryml/baml-highlightjs/dist/baml.js"></script>

Bundler users should import the ES module (src/baml.js, the package default export) instead.

Files

Path	Contents
src/baml.js	ESM module, default-exports the highlight.js LanguageFn
dist/baml.js	Classic-script build; self-registers baml on the global hljs

License

Apache-2.0

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This repository is a read-only mirror, generated from typescript2/pkg-grammar-hljs in the BAML monorepo. Do not edit it by hand; changes land here automatically when the language definition changes upstream.