[Satosa-dev] sophisticated attribute release policies

Hi, For a SAML proxy deployment (no OIDC here yet) I need a sophisticated attribute release policy that should be largely driven by SAML metadata entity categories. The policy is essentially to release the union of attributes for each of the entity categories REFEDs R&S, CoCo, and a few others to which the entity belongs. Later I am sure there will need to be per-entity adjustments (there always are...). Have other deployments already implemented tooling to implement such a policy? I don't see that the SAMLFrontend (or its sub classes) has the requisite functionality. Or that pySAML2 has it--the policy based functionality appears to mostly be around statically configured filtering and not driven by SAML metadata. Am I missing existing functionality? If I need to develop the functionality, then I am wondering if it is best done by implementing a response microservice(s), or to evolve the SAMLFrontend code? Thoughts? Thanks, Scott K