{"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-whitecitylodge-bzw8c48d","versions":[{"created_at":"2026-06-30T20:25:38Z","element_count":89,"note":"5軸GA polish 39->93 by M5 (autonomous)","saved_by":"mcp","sha256":"e9a429e4a1eebaa161f9a2bd87193e92adb3652b5740e9be93f7929aabd4916e","version":3},{"created_at":"2026-06-30T20:18:07Z","element_count":86,"note":"loop3: 設計時延床 70.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"f460cfb73f6ca4662f28b5c064f77e1b8bdeeba12917404d3b39bf81df26a908","version":2},{"created_at":"2026-06-30T20:18:07Z","element_count":86,"note":"言葉から生成: LDK+main bedroom+2 kids rooms+bathroom+storage","saved_by":"mcp:create","sha256":"","version":1}]}