{"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-sp4wc64v","versions":[{"created_at":"2026-07-19T17:51:46Z","element_count":70,"note":"5軸GA polish 41->92 by M5 (autonomous)","saved_by":"mcp","sha256":"5747771a8cb5439d1749f4c73685e466c4d12dcb1db4d2014c566b75dc5ea456","version":3},{"created_at":"2026-07-19T17:37:35Z","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":"3e8392bb69a363ff786522ab8d76ae8bff9f1b524302c49b9316aa32bc7cb9e5","version":2},{"created_at":"2026-07-19T17:37:35Z","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}]}