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Vibe codingMediumvc-g544
Subject Ai code reviewLevel Mid–Senior~15 minCommon in Algorithms & data structures interviewsIndustries Software development

Question

An AI agent wrote this notification-summary helper for a messaging app being localized into 12 languages. It passes the English tests. What's wrong with the approach for translation, and how should it be built?

js
function summary(count) {  if (count === 1) return '1 new message';  return count + ' new messages';}
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.

Learn the concepts
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.