From the spec step 3: two FieldRef additions with AutofillPrompt, the AGT.22 pattern of ContentType.AgentAsset; AutofillListener fills an empty Topics from the item when Scope.Autofill enabled=true - the cost gate stays the operator's switch (default false). Served check: the Topics column on both lists; with the gate on, a new SourceCard gets Topics.
(claude-code, 2026-09-30 07:08 UTC) Shipped 2026-09-30: Field.Topics with AutofillPrompt on ContentType.IdeaBrief and ContentType.SourceCard (AutofillOnUpdate false); served on the Sources new-item form. Scope.Autofill enabled stays false until the operator switches it (cost).