{"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-7i5l5vrt","versions":[{"created_at":"2026-06-13T16:03:59Z","element_count":84,"note":"5軸GA polish 44->95 by M5 (autonomous)","saved_by":"mcp","sha256":"44f463c16b6a3116ae9750ea258ff8f630ecbf2ebc1600be2ac990d8945ec976","version":3},{"created_at":"2026-06-13T15:53:01Z","element_count":86,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"e95903c72bb4ab1d5ef2c316af7b4ee5f7091f7a119382d05d49cd0812243dcc","version":2},{"created_at":"2026-06-13T15:53:00Z","element_count":86,"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}]}