As suggested in the ESM guidelines of Node.js it would be good to explicit the type of the module.

{
+  "type": "commonjs",
}

I believe that this implementation can be used for broadcast communication and also for games that want to hear a channel that is rolling a song for example.

Could you put a shortcut so you can start and end listening to a certain channel?
If you can have the implementation of a shortcut also to adjust the level of the channel. It will be perfect.

Because in CliClient.resume() we don't account for the case, when there is an exception in one of the async processing stages:

void resume() {
	...
	try {
		client.startAsync(state -> {
			printer.ifPresent(p -> p.print(state));
			if (!options.shouldSeedAfterDownloaded() && state.getPiecesRemaining() == 0) {
				runtime.shutdown();
			}
		}, 1000); // <-- CompletableFuture.w