_challenge_support.py 402 -> 237. _pytest_clean and _patch_and_test go
to _pytest_runner.py with the subprocess/os/sys imports they solely used;
_stream_verdict and _parse_verdict go to _verdict.py with rich's Live.
code_tutor patches by absolute string rather than a MOD constant, so the
seam cost 15 per-name rewrites instead of one sed. Two intermediate
failures caught by running it: the test modules import the moved names
directly, and five patch strings still named the old module.
Pass count is 216 before and after.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_011w2Pj4Ek3ZNMQVYcFHgXDY
