python-debugpy

You can debug a running Python process by using debugpy to listen for a client and remote attach. This allows you to inspect locals and set breakpoints on long-lived Hermes components or subprocesses without restarting them.

You can set a breakpoint in your Python script using breakpoint() to drop into a pdb REPL. This lets you inspect or mutate in-scope locals at the exact line where the error occurs.

Yes, you can debug failing pytest cases by launching scripts under pdb. The Skill provides guidance to help you avoid common xdist pitfalls during test-time debugging.

Use pdb for local interactive breakpoint debugging and REPL inspection at crash sites. Switch to debugpy remote DAP attachment when the issue only appears in long-running processes or subprocesses.

You can debug subprocess or child-worker issues by attaching debugpy to the running PID. This remote DAP approach lets you inspect program state in long-lived processes where standard debugging fails.