so you essentially want a history as long as all members of that history are present

given how much the tms relies on present state alone that would be quite a doozy

Yeah, digging around the code, I'm not sure it even makes sense with how rete works. It seems like it would require some modification.

Seems similar to a join-node, but has to appear in a different place in the network or something.

you could envisions something like layered sessions that join their nodes (3d memory from a visulization point of view) and query "downward" but thats all a ton of work

but ya i agree....doesnt really mesh with rete imo