Generate and refresh a metadata-only inventory of local `sources/` shallow clones (size, git remote, HEAD, commit date, license filename) and write it into `plugins/codex-supercharge/references/source-repos.md`. Use when you want a fast “what sources do we have?” view, to control disk growth, or before doing a source-pattern synthesis pass. Skip when there is no `sources/` directory or you are not working with local clones.
