The builder keeps what you paid for. Saved builds holds the drafts you have not saved as a plugin yet, and Build history keeps a record of every request you have sent.
Saved builds
Saved builds keeps every build you paid for until you save it as a plugin version, for up to 30 days after its last change. A build that stopped early, because it ran out of budget, timed out or hit an error, can be resumed with AI (you pay only for the new work), downloaded to finish by hand or discarded.
Build history
Build history lists every request you have sent to the builder, newest first: the prompt you wrote, the model, what it cost and how it ended. Open a build to see its prompt, the code, the validator findings, the model's reasoning when it recorded any and a transcript you can download. Use again loads a prompt back into the composer, and entries you no longer need can be deleted.