You gather every case like this one, so the rule fits unseen ones.
Claude Code. With moo off, you ask Claude to fix a bug: after you press play in the preview, the card's keyframes in the editor jump to their end values. Claude finds that a vendored library writes into the keyframes it is given, passes it a deep copy instead, and the tests pass. With moo on, you type /hope:widen and the same words. Claude fixes the bug and states one rule: only the editor writes the document; any other code that writes document data, or keeps it, gets its own copy. A table tests the rule, and Claude makes the same fix in four more places: SVG export, the layers panel, the timeline panel and undo history. A second table applies the rule to situations outside those cases and finds none where it goes wrong. It ends with a timeline sort problem it left alone and asks whether to fix it next.