Hi Toby, a curvature comb feature will probably need to be developed in the core display code, not in a script.

Scripts are designed to be used as "commands" where the script does its stuff and then exits. It can leave behind new objects and edits to objects but it isn't set up to leave behind live code that would update when a curve is modified.

I do want to add in some more entry points for where scripts can get triggered but it is a pretty tricky area. Having a lot of those can tend to destabilize the environment.

- Michael

Hi Toby,
there's a curvature node in the nodeditor perhaps that will help.
Maybe it could be made into a standalone script.
Cheers
Barry