kbq-select-trigger - allows you to override the block that displays the selected value. Without affecting the placeholder, cleaner and icon.

kbq-select-matcher - allows you to replace the entire contents of kbq-select, including placeholder, cleaner and icon

Shows how to handle selected values whose nodes were deleted on the backend: the deleted nodes are hidden from the dropdown but stay in the selection as removable error tags, the field is shown in an error state while any deleted value is selected, and a hint explains why.