{"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-dp0h11qs","versions":[{"created_at":"2026-07-13T10:09:59Z","element_count":71,"note":"5軸GA polish 40->92 by M5 (autonomous)","saved_by":"mcp","sha256":"1be2dab6425119d131172b3b17cd3f9d6e21ba5f48d176003f53e5126c152854","version":3},{"created_at":"2026-07-13T10:01:34Z","element_count":101,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"2756b2c20bb667d2eb81fe8659108b83598c6fb2ba20adc0c727a9038febb4fc","version":2},{"created_at":"2026-07-13T10:01:34Z","element_count":101,"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}]}