{"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-dq3jzvyd","versions":[{"created_at":"2026-07-18T06:06:58Z","element_count":90,"note":"5軸GA polish 41->94 by M5 (autonomous)","saved_by":"mcp","sha256":"7a0aef42836d09401376ea701de756d753510ec09c8e36c9e9c7b9cbc4cb7c29","version":3},{"created_at":"2026-07-18T06:00:09Z","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":"d7f6f77ff4629e97e76be652dc4ce20540b4502c80c1b56acc878e0fd53947da","version":2},{"created_at":"2026-07-18T06:00:09Z","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}]}