/ parabun

Parabun docs

Reference for the runtime modules and language extensions Parabun adds to Bun.

Parabun is a fork of Bun. Everything upstream Bun does — bundler, test runner, package install, Node compatibility — works the same. Parabun adds a stack of built-in modules for parallel CPU work, GPU compute, codec / capture / inference workloads, and a few language-level desugarings on .pts / .pjs files.

The sidebar groups pages into Guides (cross-cutting topics — install, language extensions, configurator, FAQ) and Modules (one page per bun:* import).

Where to start

If you want a tour, the landing page walks the module stack top-down with worked examples. If you want to look something up, the module pages have full API references with signatures, semantics, and example code drawn from the source.

Module overview

Three layers of dependency:

Modules without engines wired (Whisper was a stub, Piper / ONNX vision detectors / Parquet still are) throw at the engine boundary with a documented error message. Their interfaces are stable so callers can write against them now.

Language extensions

Language extensions covers the .pts / .pjs syntax: pure / memo declarators, signal / effect / ~> reactive bindings, |> pipeline + inlining, ..! / ..& / ..= suffix operators, and defer / arena block forms. All desugarings are parse-time and emit standard JS.

Other reading