{"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-bthhy7vu","versions":[{"created_at":"2026-06-13T14:35:14Z","element_count":84,"note":"5軸GA polish 43->96 by M5 (autonomous)","saved_by":"mcp","sha256":"4e747c1b50534c70700916d840e11d4e37e6eacdc3a0354c5ec045f6d37a3b0d","version":3},{"created_at":"2026-06-13T14:22:39Z","element_count":126,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"174b6f8083883767f67a144345d5c58105021d01c60d2fd4b8d3b4054105f11c","version":2},{"created_at":"2026-06-13T14:22:35Z","element_count":126,"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}]}