Question
You're tasking an agent with a risky change: a backfill that rewrites a `users.region` column for 80 million rows in Postgres, derived from a new geo-lookup, while the table is in active use. The agent is capable of writing the whole migration, the backfill job, and the rollback. Where exactly do you insert human-in-the-loop checkpoints, and which steps do you refuse to let it run autonomously no matter how good the code looks?
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.