{"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-9s0qli44","versions":[{"created_at":"2026-06-29T06:21:00Z","element_count":88,"note":"5軸GA polish 39->93 by M5 (autonomous)","saved_by":"mcp","sha256":"f7457ef027c3de3d8b1959803bac2675b42e26aa16483a64365eeb78225fcf3a","version":3},{"created_at":"2026-06-29T06:08:16Z","element_count":101,"note":"loop3: 設計時延床 70.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"006b2a795917b8f8899c6d6a2873ea474f4c1200c87e40ac2a12511997ad941e","version":2},{"created_at":"2026-06-29T06:08:16Z","element_count":101,"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}]}