README: rolling back

Co-Authored-By: Claude Opus 5.5 <[email protected]>

1 files changed, 8 insertions, 0 deletions

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@@ -104,6 +104,14 @@ files onto the server by hand: what runs should always be a commit.
 git push prod HEAD:prod && git push origin HEAD:master
 ```
 
+## Rolling back
+
+The previous deploy is the previous commit: `git revert` and push, or push an
+older commit to `prod` (`git push -f prod <commit>:prod`). `names` reads its
+SQLite state either way. Before the SQLite change, the JSON file it was
+imported from is still in the data directory, but it stops at the moment of
+the import.
+
 ## Tests
 
 ```sh