After discussion with Krzysztof Findeisen about approaching implementation of the new Filter design, we wanted to write down a list of requirements for the new system.
RFC-541 was more focused on technical requirements, but some of the comments there can be built on to help with use case requirements. RFC-624 provides a design, but discussion since that has led to some questions about how exactly that design maps to how this system would be used.
For this ticket, I will write up (probably not a DMTN?) a list of use cases and requirements for Filters in the stack, based on the above RFCs, my own experiences with the Instrument FilterDefinitions, and expectations for how filter names are used for photometry.