Vibe codingMediumvc-g277

Subject Ai refactor migrationLevel Mid–Senior~20 minCommon in Code quality & review interviewsIndustries Software development

Question

Your TypeScript codebase uses the deprecated Moment.js for all date handling. You ask an AI agent to swap it for a modern library (date-fns / Luxon / Temporal). The agent does a clean find-and-replace and the build is green. Why is a green build dangerous here, and what do you verify before shipping?

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.