Bun Native Messaging host

1. Navigate to chrome://extensions.
2. Toggle Developer mode.
3. Click Load unpacked.
4. Select native-messaging-bun folder.
5. Note the generated extension ID.
6. Open nm_bun.json in a text editor, set "path" to absolute path of nm_bun.js and chrome-extension://<ID>/ using ID from 5 in "allowed_origins" array.
7. Copy the file to Chrome or Chromium configuration folder, e.g., Chromium on *nix ~/.config/chromium/NativeMessagingHosts; Chrome dev channel on *nix ~/.config/google-chrome-unstable/NativeMessagingHosts.
8. Make sure bun executable and nm_bun.js are executable.
9. To test click service worker link in panel of unpacked extension which is DevTools for background.js in MV3 ServiceWorker, observe echo'ed message from Bun Native Messaging host. To disconnect run port.disconnect().

The Native Messaging host echoes back the message passed.

For differences between OS and browser implementations see Chrome incompatibilities.

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