{"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-bgb7ey60","versions":[{"created_at":"2026-06-16T06:24:31Z","element_count":90,"note":"5軸GA polish 39->93 by M5 (autonomous)","saved_by":"mcp","sha256":"65b13c12ca250f0d44eabfd16b78f2b9aa02a87b55ffc44a05cc1ddeaca315bc","version":3},{"created_at":"2026-06-16T06:20:30Z","element_count":119,"note":"loop3: 設計時延床 65.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"a187e417f8d6db57bdda899ecf39a0f7bd89abd691e8b7712429b230e67065e0","version":2},{"created_at":"2026-06-16T06:20:28Z","element_count":119,"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}]}