Robert Carlin recently wrote a good piece about KEDO, which implemented key parts of the Agreed Framework. The whole thing is worth a read, but this part particularly struck me:

The biggest surprise of all in KEDO’s New York headquarters came when in September 2005, we learned that Ambassador Christopher Hill, at the very meeting finalizing the Six Party Joint Statement, had announced that “the United States supports a decision to terminate KEDO by the end of the year.” Jaws dropped open.

<snip> [this feels really ~2005]

There had been no coordination, no warning from Washington this statement was coming, and thus no opportunity to prepare the ground ahead of time with the North Koreans. We still had workers at the site. We were still reviewing evacuation plans. And now, we had been left hanging.