Question
You're using an AI agent to build a Stripe webhook receiver in Python (FastAPI) from scratch: it must verify signatures, be idempotent, and trigger downstream order fulfillment. Lay out the build plan you'd give the agent — the framework/library choices, the order you build it in, and the acceptance criteria. Call out exactly where a careless prompt ('write me a Stripe webhook endpoint') goes wrong.
Treat the AI’s output as a draft to verify, not an answer to trust. Name the specific flaw and the input that triggers it, say how you’d catch it — tests, edge cases, reading critically — and how you’d re-prompt or decompose to get it right.
Vibe coding: describe the solution in plain language (or narrate it) and the coach grades your approach. Generating runnable code from your description is coming next.