Recently I've managed to enable KB generation Skill for a custom table extended from task. As I didn't found any post about this, I've decided to share my result.
Basically, I wanted to use Now Assist Topic "Generate KB article" to create article from a custom table. I've found a way to do it by cloning the "Choose Input" Var set and "Define Availbility" and adjusting the routing to the custom table and its fields.
I've added the custom table into "Now Assist Skill Config Applicabilities" aswell.
Be sure to match the Access Controls and ACLs from incident to the custom table.
Then that's my result:
