{"note":"bim_versions 導入後の保存のみ記録 (それ以前は bim_canonical 上書きで履歴なし)","ok":true,"slug":"u-house-9ws4epi1","versions":[{"created_at":"2026-06-10T22:57:22Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"b8f90a4e803a0ab45f719c8f926226fc75f5d04e77fc4eeafde59c4583439333","version":10},{"created_at":"2026-06-10T22:02:05Z","element_count":51,"note":"revert: houki rescan NG -> restore pre-polish elements (M5 2026-06-11)","saved_by":"mcp","sha256":"b74d02d3dfad0000819086a65ee0f56a6c7478d8381586a6fb7e50a8f45d1564","version":4},{"created_at":"2026-06-10T19:18:49Z","element_count":71,"note":"5軸GA polish 60->93 by M5 (autonomous)","saved_by":"mcp","sha256":"48a92273fa281bc304cde096dce917a302366189b61fb818273511e570727904","version":2}]}