The README documents work/build_folders.py as the orchestration script
for hand-sorted-folder identity import, but it was excluded by the
work/ gitignore. Force-track it for parity with the other orchestration
scripts (age_split_001.py, check_faceset001_age.py) so the documented
workflow points at code that exists in the repo.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
