An Altium Designer 25.8 bridge for agents. The editor's Selection Filter also applies to a scripted `Prim.Selected := True`, and "for a type switched off there the assignment is silently refused." Every path that selects and then acts "does nothing for those types and still reports success," seen as "selected 51, removed 0" and select_objects returning a count with nothing selected. The fix turns the filter off around each programmatic selection and restores it.