{"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-mjoobc5w","versions":[{"created_at":"2026-07-13T09:54:01Z","element_count":72,"note":"5軸GA polish 46->95 by M5 (autonomous)","saved_by":"mcp","sha256":"d080dfce47ef110242833c38324ebc2d6304d48fb1c3fe27268519b8d02cfcde","version":3},{"created_at":"2026-07-13T09:43:34Z","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":"45ed935e51d0dad8e79fb66382f4e9bc3f997ed37d28233a897fa4fe72cc8ed0","version":2},{"created_at":"2026-07-13T09:43:34Z","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}]}