I have the impression that the didChangeWatchedFile notification is too much. Why do we need it when we already have didChange/didSave? It seems simple to send a didChange and/or a didSave for a file (even if it wasn't open first) when we see a change. What makes the watches files so special?

Overall, I think this operation is too much, and the real issue when trying to consume watched files is more to be informed from the server about which files to watch.

Cf https://bugs.eclipse.org/bugs/show_bug.cgi?id=516216