Thanks for the suggestion, this is very helpful. Do you know if this also bypasses issues of file ownership, or is this only relevant to the sandbox? (Editing of non-owned files using an admin password is a gorram nightmare on modern OS X.)
It should be non-trivial for both user and developer, but it shouldn't require interprocess communication and reading fifty-ish pages of docs. It's a little insane, and I gave up on trying. (It was a simple GUI for editing a particular system file, similar to what Cocktail does; like sudo vi, but more convenient.)