[remram]

idempotent != immutable

Search is idempotent in the sense that it doesn't change anything on the server, other than mutating caches (which should be idempotent).

[naniwaduni]

Pretty sure nobody cares about ensuring that e.g. a proxy knows that nothing will go wrong if it issues a search twice. It's the reverse direction that matters.

[remram]

Yes, this is why search is idempotent

[pii]

Oh TIL. Thanks