Easy peasy once you know how.

1. start up your server with the -u
2. put debugger in your code where you want the debugger to start
3. run that code e.g. in a web browser

The web browser will hang, and a debugging session will be started in the terminal you ran the server. Main things to remember are

• h get help
• l list the code where you are
• reload if debugger doesn’t pick up changes in your code give it a little kick
• cont carry on execution

That should be enough to keep me happy