I’ve created a definition that can ‘bevel’ the nodes in a network. If anyone is interested, please help me test it and provide feedback for further improvement.

It can bevel (not sure if this is the correct term) the nodes in a 3d network. The node selection is based on their valence.

Thank you very much! @laurent_delrieu
I also solved this case yesterday with a simple solution.
It uses your 3D Convex Hull to make the connection and uses Delete Vertex to remove the wrong edges. But 3D Convex Hull cannot solve 2D (all points are coplanar) cases, so I made the detection Boolean mask with Is Points Coplanar (Pufferfish).

Not sure if this is perfect. Need more tests.
This idea is inspired by Bevel Vertices in Blender.

This definition requires plugins:
Nautilus
Pufferfish

For a similar problem i also used convex hull. Also if all curves are on a side of the points I had to use a Bounding cone. Cone that contains all the direction vector of line at a node.