Question
You asked an AI agent to 'add validation to the user registration form' for a global SaaS product. It returned regexes that reject names with non-letters, require a two-part name, validate emails against a strict pattern, and require phone numbers in a US format. The tests pass. What's wrong with these 'sensible' defaults, and who gets locked out?
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.