derived

The keys of an item's typeData that a run writes, and a person never edits (simulation-ux §SXD-1, §SXD-5).

In the namespace construct::model.

Detailed description

An item's typeData holds its inputs and its derived results side by side. Undo restores inputs only, so the executor leaves these keys out of the snapshots of an edit, and a run writes them with item.set_derived, which is no undo step. One list per item type lives here, and a test checks that a run writes no key that the list lacks.