{"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-opoll85u","versions":[{"created_at":"2026-06-30T19:50:48Z","element_count":83,"note":"5軸GA polish 44->97 by M5 (autonomous)","saved_by":"mcp","sha256":"1e80ab69849637a6f8e24a29adca3fc1ae7a0e37383b32e24d8e3263da8b856d","version":3},{"created_at":"2026-06-30T19:44:55Z","element_count":126,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"4987d1aaaed3c5c558c475fc872894263e1b97483d17df628ac03363144da4f6","version":2},{"created_at":"2026-06-30T19:44:55Z","element_count":126,"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}]}