Oh--doesn't that mean that every HTML file in the project has to get passed to `setRequestFilter()` (and that it would need to get called any time a new HTML file is added)? Or were you thinking that LD would just call `setRequestFilter()` with a single document each time we switch documents in Live Development? That seems simple enough, but at that point it does almost seem like it would be simpler for LD to just hand the server the instrumented code for each current document. (I think I might have misunderstood Glenn's original proposal--I thought he was saying that the server should just call back for any request in a given project.)