I think it's pretty reasonable to say the executive branch has no legitimate purpose in keeping secrets from select parts of the judicial and legislative branch

I think it's pretty reasonable to say the executive branch has no legitimate purpose in keeping secrets from select parts of the judicial and legislative branches. That completely undermines our system of checks and balances, which seems to work quite well otherwise. Also, there are at least two kinds of secrets to consider: "structural" ones, like "this program exists" and specific details "agent Bob is part of this program". I could see the need to keep some of the latter even from other parts of the government, but it seems the former could do with some review. That's where the problems usually come from, after all: either government programs that overreach their authority or failures swept under the rug. At the same time, they're much less of a security threat than specific details of a program.