The whole hunk
from line 171, old and new numbered
/
lines
from line 171
171171 </Step>
172172
173173 <Step title="Capture checkpoint UUID and session ID">
174 With the `replay-user-messages` option set (shown above), each user message in the response stream has a UUID that serves as a checkpoint.
174 With the `replay-user-messages` option set, each user message in the response stream has a UUID that serves as a checkpoint.
175175
176176 For most use cases, capture the first user message UUID (`message.uuid`); rewinding to it restores the tracked files to their original state. To store multiple checkpoints and rewind to intermediate states, see [Multiple restore points](#multiple-restore-points).
177177