Make one precise list correction

A boundary is a request, not a guarantee.

Say leave everything else the same. This sets the boundary. It does not prevent every possible AI mistake.

Check the requested change, then read the whole new list. Look for dropped entries, changed counts or a new order you did not request.

If you find more than one error, keep track of all of them. You can work on one at a time, but do not call the list checked while known errors remain.

A new choice changes your plan. A correction restores a fact from the source. Keep that difference clear.

When a source fact is missing, ask the person who knows. A clearer instruction cannot supply the missing fact.

Move the towel and preserve the rest.

Made-up list: Beach has sunscreen and a hat. Snacks has a towel, 2 water bottles and crackers. The owner wants the towel at the end of Beach. The other entries and their order should stay the same.

Add one item without losing the others.

Sample day-trip list: Bag: book, hat. Food: water, crackers. You choose to add a phone charger at the end of Bag. Write the request and the exact result you will check for.