- test_scm_configured.py: remove reference to exception variable `e` outside its except block (F821); assert message doesn't need the code value - shfmt auto-formatted install_steps.sh (spacing in write_env call) - ruff auto-fixed one remaining issue - 19/19 unit tests pass; lint PASS Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>