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Artifact types can be reused as sub-types such as design systems, applied via the list action with a type or type_url.
The Artifact-type discovery prompt now documents how to list and apply reusable sub-types, such as design systems, to a new Artifact via action:"list" with a type/type_url. It defaults to the org's default type without asking, or asks the user when several such types exist and none is marked default.
Names in the bundleaction: "list"type_url