What probably matters to youSection of the release
What
After you approve an ultraplan in the browser, all three choices are now implemented: implement it in the current session, start a fresh session with it, or cancel.
Details
Implement here queues the plan as a prompt in the running session.
Fresh session starts a new one with the plan as the first message, and can save or clear the previous session first.
Cancel writes the plan to disk and tells you the file path.
Evidence
The user approved the ultraplan in the browser and chose to implement it in this session
Strings lifted out of the shipped bundle, so the claim above can be checked against them.