Problem SHKTitle, SHKTextInput, and SHKEmail all support a required: Bool parameter that prevents submission when the field is empty. However, SHKPicker has no equivalent — it always auto-selects the first item and the user can submit without making an active choice. This makes it impossible to enforce that the user deliberately selects a feedback category (e.g., Bug, Content issue, Voucher issue) before submitting. For teams that triage tickets by picker tags, unintentional default selections create noise and slow down routing. Requested changes required on SHKPicker — When required: true and no explicit selection has been made by the user, block submission the same way empty SHKTitle/SHKTextInput fields are blocked. Optionally support an unselected/placeholder initial state (e.g., initialValue: nil or a dedicated placeholder parameter). Submission validation hook — A callback like shakeWillSubmitListener that returns a Bool (or receives a completion handler) allowing the host app to validate form data and cancel submission. The current shakeSubmitListener is fire-and-forget and cannot prevent a ticket from being created. Use case We use a custom form with a SHKPicker for feedback type categorization. Tickets are auto-routed by the picker's tag value. Without a required picker or a validation hook, users frequently submit with the default first item selected, causing mis-routed tickets that require manual re-triage.
