[xunguangzlj-cloud]

Linting a project containing a symlink to an ancestor repeatedly traverses the same directories. Multiple directory aliases also cause the same CSS file to be checked more than once, because collection only deduplicates file path strings.

Track visited directories and files by realpath before descending. Valid external directory links remain supported, and reports keep the first discovered path. No dependencies or lint rules change.

Add a regression to the existing refcheck runner that invokes the real CLI on a project with a parent cycle and two links to one shared directory. It must finish and report exactly one file. The fixture uses junctions on Windows and directory symlinks elsewhere, with a five-second subprocess timeout.

Validation:

• With the original collector, refcheck fails only the new symlink fixture; with the fix, it is clean across 101 reference files.
• All 50 themes validate; regenerating the index leaves no diff.
• git diff --check passes.
• Re-ran refcheck after updating the fixture wording to match the project's English conventions.

Local verification used Windows and Node.js 24.16.0. Cross-platform hosted checks are pending. Vercel requires Together AI team authorization for this external contribution; that deployment gate is separate from local validation. Prepared with AI assistance; maintainer review and merge remain pending.

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