{"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-156417v8","versions":[{"created_at":"2026-06-13T15:02:19Z","element_count":72,"note":"5軸GA polish 42->93 by M5 (autonomous)","saved_by":"mcp","sha256":"d61bb8bae6f14ae95e90c0a3c69e0677427a0d495746fe112e8173c1d301ed30","version":3},{"created_at":"2026-06-13T14:45:59Z","element_count":86,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"f1e0ae94a2d5b4402112b0961a41d0f2cc1b262f40cdd3d69a55b8d1364d3656","version":2},{"created_at":"2026-06-13T14:45:58Z","element_count":86,"note":"言葉から生成: LDK+主寝室+子供室2+浴室+収納","saved_by":"mcp:create","sha256":"","version":1}]}