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The user's ruling on PR #314: a folder always merges, so even a single CSV in it records its file identity. A CSV named directly still imports alone. The "(none)" question is answered as no position, per the user. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01VdfEGXA7aJ6ftMsCc9PJze