{"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-ujznbqmg","versions":[{"created_at":"2026-06-13T20:46:42Z","element_count":90,"note":"5軸GA polish 44->98 by M5 (autonomous)","saved_by":"mcp","sha256":"ad702d16e1578a00fe9dd89df54c28f6cde66d172d9c9c195cec0a34f8162dfd","version":3},{"created_at":"2026-06-13T20:38:08Z","element_count":130,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"522c0c35ad904fc5e0dde4e3f880b804c769d8adfbd0294ae92d600b24abc41f","version":2},{"created_at":"2026-06-13T20:38:08Z","element_count":130,"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}]}