On a microscope controller, the upload "programs the first Teensy it finds," which can be the joystick panel instead of the controller. "Until now the README's only safeguard was 'disconnect the extras'." The new script picks the board by serial number and checks it comes back running. Still draft until a bench check on real boards.
From the Grok pain-radar digests, Nov 2 2026 (Nov 2 8:41 AM ET through Nov 2 10:41 PM ET digests plus the Haitch editions). Verified live 2026-11-03: issue/PR read; title and state confirmed.