This originates at #1978 (comment) when @yuvipanda said

I would love for us to not have a breaking change in the binderhub client if we can! is there a way to re-export that or similar?

@yuvipanda are you talking about the change from

import { BinderRepository } from "@jupyterhub/binderhub-client";

into

import { BinderRepository } from "@jupyterhub/binderhub-client/client.js";