{"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-5an8tsht","versions":[{"created_at":"2026-06-13T14:20:30Z","element_count":90,"note":"5軸GA polish 47->98 by M5 (autonomous)","saved_by":"mcp","sha256":"cdc2abc8e292a0017674e41aaea69071f18118d7b9f9cbecbcedbd1cd82de582","version":3},{"created_at":"2026-06-13T14:16:58Z","element_count":134,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"ed96f3647e3f4fc77d605968b4578d314072e82d5fd5e3e67046d0995ea738e5","version":2},{"created_at":"2026-06-13T14:16:57Z","element_count":134,"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}]}