Changelog - 2026-10-21

BunCompiler compiles Bun Workers into the binary

Feature

In one line. List the Bun Worker files your app starts in workers, and BunCompiler.compile puts them in the same executable.

// .configs/builders/compile.ts
await BunCompiler.compile({
  entrypoint: './src/index.ts',
  workers: ['./src/image-reader.worker.ts'],
  define: await BuildInfoStamp.define(),
});

What changed

• workers?: string[]. Bun only embeds a worker file in a compiled executable when the file is an entrypoint of the build. BunCompiler.compile passes each worker after the main entrypoint, so new Worker('./image-reader.worker.ts') in the app finds it inside the binary.
• entrypoint is unchanged. A compile without workers needs no change.

Who is affected

An app that starts a Bun Worker and called Bun.build itself to include it can move to BunCompiler.compile({ workers }).