{"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-r6n9f15l","versions":[{"created_at":"2026-07-02T07:42:02Z","element_count":83,"note":"5軸GA polish 45->96 by M5 (autonomous)","saved_by":"mcp","sha256":"1295584ea0c4890500c2c16126ac33a9e247b396d43c391bb3b621a309a23d40","version":3},{"created_at":"2026-07-02T07:30:45Z","element_count":105,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"2a11f3eb73ec7addf4ef9ed5478d2a7e0633e67e83bdd6f954645ad11df93e3e","version":2},{"created_at":"2026-07-02T07:30:44Z","element_count":105,"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}]}