{"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-kxyl5k72","versions":[{"created_at":"2026-07-07T19:24:33Z","element_count":83,"note":"5軸GA polish 42->94 by M5 (autonomous)","saved_by":"mcp","sha256":"35ed4f7ef2499a3ae640011c155bc105548afa89d989b5936fcdf83220cc0d1e","version":3},{"created_at":"2026-07-07T19:18:39Z","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":"84598b1362bb60ca87ff199141aed21476cbc38f5cb12ff06f7d4982496d7ce0","version":2},{"created_at":"2026-07-07T19:18:39Z","element_count":86,"note":"言葉から生成: LDK+主寝室+子供室+浴室+収納","saved_by":"mcp:create","sha256":"","version":1}]}