Extend with JavaScript - Console commands - Docs

You can register custom console commands using app.rootCmd.addCommand(cmd), where cmd is a Command instance.

Here is an example:

$app.rootCmd.addCommand(new Command({
    use: "hello",
    run: (cmd, args) => {
        console.log("Hello world!")
    },
})) 

To run the command you can execute:

./pocketbase hello

Keep in mind that the console commands execute in their own separate app process and run independently from the main serve command (aka. hook events between different processes are not shared with one another).