Queue worker concurrency spec
You need an AI agent to build a worker that consumes jobs from a queue, processes each exactly once, and updates a Postgres row — across many concurrent workers. Write the prompt/spec that makes the concurrency correct the first time. What does a generic 'write a queue worker' prompt get wrong under load?
Implement
settle_deliveries(deliveries: list[str], max_attempts: int) → list[str]Examples
in
[["j1:commit","j1:commit","j2:commit"],3]out["j1","j2"]in
[["j5:crash","j5:commit"],3]out["j5"]in
[["j9:crash","j9:crash","j9:commit"],2]out[]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.
0:00 of about 20 min
Vibe & agentic: describe the solution in plain language (or narrate it) and the coach grades your approach.
Which questions mattered is sealed until you submit. Telling you now would just be handing over the edge cases.
Run or narrate your approach, then ask the coach.