Muhammad Waqar

great to hear there is broader consensus on this, is there a extension hook/api design sketched out or discussed for this already?

I was reading through the [Envoy AI Gateway proposal document](https://docs.google.com/document/d/1FQN_hGhTNeoTgV5Jj16ialzaSiAxC0ozxH1D9ngCVew/edit?tab=t.0#heading=h.uuu99yemq4eo) and seems like they have a similar use-case to set custom resources as HTTPRoute backendRefs (pasting snippet from the doc...

I am not looking for anything specific. Just a general mechanism/guideline to vendors on how to update policy resource with status with EG extension server, similar to how BackendTLSPolicy works....

+1 Gateway API spec recently seems to be introducing policies on a per-`BackendReference` (`Service`, `ServiceImport`, `Backend`) basis as well. For example: - `gateway.networking.k8s.io/v1alpha3`: `BackendTLSPolicy` ([reference](https://gateway-api.sigs.k8s.io/reference/spec/#gateway.networking.k8s.io/v1alpha3.BackendTLSPolicy)) - `gateway.networking.k8s.io/v1alpha2`: `BackendLBPolicy` ([reference](https://gateway-api.sigs.k8s.io/reference/spec/#gateway.networking.k8s.io/v1alpha2.BackendLBPolicy)) Revisiting...

I am looking into this, @jukie are you working on a specific timeline?

> can we start off with a design doc for this I agree that this is a fundamental change to current behavior to EG and quite an involved implementation change,...