- **Docs History keeps editing sessions (#5236).** A Docs edit now pins its confirmed result as a checkpoint at least ten minutes after the newest checkpoint, or five minutes after another author's, so History lists later revisions with their author and time instead of only "Revision 0". Automatic snapshots never refuse an edit, share at most half of the History budget, pause while workspace storage is more than 80% used, and are not deleted while the document exists. When none can be kept, edits still save and History says so (`history_limit_reached` in `crewship doc checkpoints`). Explicit checkpoint IDs starting with `session-` are now refused.