The parameter name srv in StreamServerInterceptor is confusing because:

• In unary interceptors, the service implementation is clearly named Server (UnaryServerInfo.Server).
• In stream interceptors, it’s passed as srv any with no comment.
• Because the type is any and there’s no documentation, it’s unclear whether srv is the same thing as UnaryServerInfo.Server or something different.

Is srv just a shorthand for "server", or is there a semantic difference?

To improve clarity, I suggest adding a short comment that explicitly states what srv is.

// srv is the service implementation the user provides.
type StreamServerInterceptor func(srv any, ss ServerStream, info *StreamServerInfo, handler StreamHandler) error