_leaves named a column for a key like `-1.0` that _dig can never read back, so the export showed an always-empty column. Skip such a key. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01QgG6TJw5qBZzaLghQSRVrq