I had a scheduled script that ran fine by hand and produced nothing on a schedule. Exit code 0, no error in the log, an output file created and empty. The script calls a CLI tool that reads credentials from the macOS keychain.
Source: [Dev.to](https://dev.to/tinyproof/i-fixed-one-silent-failure-and-stopped-looking-a-review-found-three-more-3hf1)