28 Hours of Green Logs, Zero Replies: How a Single `echo` Line Swallowed Every Exit Code

For 24 hours, every dashboard was green. Every launchd job reported exit 0, and the logs lined up neatly with (exit 0) on every row. Meanwhile, DM replies on X (formerly Twitter) were at zero for the entire day, and YouTrust was the same. The failures were happening. The exit codes just never made it back to the caller. Back in university I...