Was playing with the PolyKnit tool in the viewport and quickly came to the realization…it doesn't work at all.

It asks me to left click a point and hit enter to begin. It won't let me select any points. If I hit enter, it says to shift+left click to continue. When I do that, it asks me to select a point and hit enter again. It won't even create the PolyKnit node.

Manually adding the node and specifying the point list works as expected.

Houdini: 15.0.392
OS: Windows 10
GPU: NVIDIA GTX 670 driver 361.91

New information. Looks like the Polyknit viewport tool is only letting me select points that are already part of a primitive polygon. Points by themselves are unselectable. Not too terribly useful.

Polyknit tool
in name only
much broken mess.