Code Room
Vibe codingMediumvc-g088
Subject Ai prompt iterationLevel Mid–Senior~17 minCommon in Algorithms & data structures interviewsIndustries Software development

Question

You ask an AI for a Python regex to extract @mentions from chat messages so you can notify users. It returns `re.findall(r'@(\w+)', text)`. It pulls names fine until QA reports notifications firing from email addresses (`@gmail` in `a@gmail.com`), code blocks (`@property`), and it misses `@jean-luc` and `@O'Brien`. You re-prompt 'be more accurate' and it adds `\b`, which fixes nothing. How do you re-steer this to actually match your product's mention rules?

What a strong answer looks like

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.

Describe your solution

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.

Run or narrate your approach, then ask the coach.