{"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-6x3kxsbr","versions":[{"created_at":"2026-06-14T17:43:28Z","element_count":82,"note":"5軸GA polish 41->94 by M5 (autonomous)","saved_by":"mcp","sha256":"6d31cc769cd1d4241375d0d153d17f1c987b42e5592cf2d9d6abef01af2fac51","version":3},{"created_at":"2026-06-14T17:36:16Z","element_count":119,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"8ab9fc57b5382d9a94cdac83b1bf2f0f133acc91e790967cb23bb3ca117bbf88","version":2},{"created_at":"2026-06-14T17:36:16Z","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}]}