This issue is requesting an enhancement to Perseus. Details of the scope will be available in issue labels.
The user described the problem related to this request as follows:

State amalgamation with different types

The user described the issue as follows:

State amalgamation currently uses the same state type for build type state, request time state, and amalgamated state. This makes using it a bit awkward since likely have to use some kind of enum with variants for the different kinds of states in it. It would be more convenient if you could just specify separate types for BuildTimeState, RequestTimeState and an fn amalgamate(BuildTimeState, RequestTimeState) -> AmalgamatedState function.

• The author is willing to attempt an implementation: false