Bash logging helper
You need a small Bash logging helper sourced by other scripts: functions `log_info`/`log_warn`/`log_error` that timestamp messages, write to both stderr and a logfile, and respect a `LOG_LEVEL` threshold. You'll ask an AI agent to write it. Draft the prompt/spec — constraints, edge cases, acceptance criteria — for a first-try-correct result. What does a lazy prompt ("add some logging functions to my bash script") get wrong?
render_log_lines(threshold: str, levels: list[str], messages: list[str]) → list[str]["INFO",["INFO","WARN"],["starting up","disk almost full"]]out["stderr INFO: starting up","stderr WARN: disk almost full"]["ERROR",["INFO","ERROR"],["starting up","cannot write logfile"]]out["stderr ERROR: cannot write logfile"]["WARN",["warn"],["100% of quota used"]]out["stderr WARN: 100% of quota used"]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 & agentic: describe the solution in plain language (or narrate it) and the coach grades your approach.