Email validation regex spec
You're asking an AI agent to generate a JavaScript regex that validates user-submitted email addresses on a public sign-up endpoint. Write the prompt/spec that gets a correct, safe pattern the first time — what constraints, edge cases, and acceptance criteria do you spell out, and what should the AI use instead of a hand-rolled mega-regex? Then state what a naive prompt like "write a regex to validate emails" would produce that's actually dangerous in production.
accept_email_addresses(candidates: list[str]) → list[bool][["a@b.co","plain","x y@z.com"]]out[true,false,false][["user+tag@example.com","a@@b.com","a@b."]]out[true,false,false]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 & agentic: describe the solution in plain language (or narrate it) and the coach grades your approach.