code-maat's CSVs and a per-file churn CSV go into one directory, one
sparse model is imported from it, and a checked-in improvise script
builds and exports the views the report prints.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01VdfEGXA7aJ6ftMsCc9PJze