QA: Interrupt (Headless) — Mastra

Stub — authored for column completeness. This is a testing-kind demo (see kind: "testing" in feature-registry.json) and does not warrant a full manual checklist.

Prerequisites

• Demo is deployed and accessible at /demos/interrupt-headless
• Agent backend is healthy; OPENAI_API_KEY is set
• Same NATIVE suspend backend as gen-ui-interrupt (the schedule_meeting tool suspend()s → @ag-ui/mastra bridge → AG-UI interrupt). The DIFFERENCE is the frontend: useInterrupt({ renderInChat: false }) returns the picker element, which the demo places in the LEFT app-surface pane instead of the chat.

Test Steps

• Navigate to /demos/interrupt-headless; verify the empty state renders (data-testid="interrupt-headless-empty") in the left app surface
• Send a scheduling prompt (e.g. "Book an intro call with the sales team to discuss pricing.") and verify a time-slot popup (data-testid="interrupt-headless-popup") appears in the LEFT app surface, NOT in the chat
• Click one of the slot buttons (data-testid^="interrupt-headless-slot-") and verify the popup unmounts back to the empty state and the agent confirms the booking back in the chat

Expected Results

• Page loads without errors
• Interrupt resolves via the plain button grid (headless — the picker renders in the app surface, not in-chat) and the Mastra run resumes with the picked slot