Interceptors are bound globally (G), on the controller (C) and on the route (R). In what order does their code run before and after the handler?

On the way in, interceptors run from global to controller to route. On the way out, the observables unwind like nested function calls. So the after-logic runs in reverse: route, then controller, then global.

"Before: G, C, R. After: G, C, R" is wrong. Running the same order both ways would mean the outermost wrapper finishes first. Nested streams don't work that way: the innermost one finishes first.