## Problem/motivation Follow-up to: #3586202 _**Verify this is still an issue and the solution approach before proceeding**_ `AiContextSelector::getPrefilteredPublishedItemIds()` loads all published item IDs before applying `AiContextScopeIndexService::getItemIdsByScope()`. That means scoped agent selection can still begin with a full-catalog ID query and a large in-memory ID array, even though the scope index exists to narrow the candidate set. This should be fixed before RC1 because the common subscribed-agent path should scale with the matching scope set, not the total published context catalog. ## Solution - Move published/access narrowing into the indexed query path where possible. - Add a selector/index method that returns scoped published candidate IDs without first materializing every published item ID. - Preserve global-item inclusion separately, but avoid using the full published set as the default candidate universe. ## Tasks - Check against other issues to make sure it wasn't separately reported - Verify this is still an issue before proceeding - Verify the solution approach before proceeding - Update code - Review and test ## AI usage disclosures - [x] AI Assisted Issue - [ ] AI Assisted Code - [ ] AI Generated Code