Cameron White

Agent from Rig does create a new agent, but if you follow a KineFX-style workflow for creating the agent (as in the attached example) then that isn't a problem

The agent's rig stores the list of defined channels as well as the joints (https://www.sidefx.com/docs/houdini/crowds/agents#rig), so adding new channels involves modifying the agent's rig. If you do this later on, there isn't a node-based way to do it and you'd need to use HOM (e.g. hou.crowds.replaceAgentDefinitions() after creating a new version of the agent definition with the modified hou.AgentRig

You could try using the Configure Primitives LOP to edit the visibility properties

Using the crowd tools is probably the easiest way to simulate a large number of ragdolls. The KineFX ragdoll solver is aimed more at a single character, so it would be awkward to set up unless you merge all the skeletons together with unique joint names, or something like that