This seems very useful!

The behaviour of auto-imports https://github.com/CZ-NIC/pz#auto-import seems bit scary:

> Caveat: When accessed first time, the auto-import makes the row reprocessed. It may influence your global variables. Use verbose output to see if something has been auto-imported.

It sounds like this could cause some very subtle bugs. Maybe a strong and clear warning when a line is being reprocessed would help.