Now that there is a working search in the Gray Book, wouldn’t it be a good starting point to build a node reference in there? Just searched for PBR and was surprised nothing was shown in the results under Reference…
For me what is currently called “Reference” in the navigation of the Gray Book feels more like it could be named “Manual”, or simply “Documentation”. And “Reference” could be another menu entry which only contains what is currently listed under “Libraries”, plus a place where a node reference can evolve, with a short description of the functionality and the input and output pins.
I think the separation makes sense, when looking how Cables is structuring the documentation: