This is an experiment to see how much of a Foundry VTT game can be controlled by a remote server. The goal is to create an FRP-oriented protocol suitable for fully instrumenting a 2D VTT, but particularly specialized for Foundry.
The project is comprised of two parts: a FoundryAI server and a Foundry module to speak with that server. The communication between the foundry-ai module and the FoundryAI server is via HTTP and WebSocket.
The application-layer protocol currently under consideration is JMAP with particular emphasis on the JMAP subprotocol for WebSocket. The intent of using JMAP is to abstract the state shared by the VTT and the FoundryAI server as being isomorphic to a single (large) JSON document, and then use JMAP to efficiently synchronize the necessary parts of that document between the participants.
WebSocket support is prioritized over HTTP for performance reasons. HTTP support for aspects of JMAP that can be conducted over the JMAP subprotocol for WebSocket are expected to primarily be of interest to implementations targeting clients more limited in their commmunications options than Foundry VTT.