Interrupted agents need a recoverability contract, because accurate restoration can hide a disallowed starting point.

Restart and repeat finished work, or continue from unverified progress and carry earlier errors forward (arXiv 2609.13672). This paper makes reuse an explicit decision, binding the choice of starting point and the permitted recovery action to supporting evidence, execution and independent checks. Four deterministic and 20 paired file challenges show accurate restoration and successful completion can both hold while the starting point was not permitted, and event-time tests show permission has to constrain the recovery action, not just the restored bytes.