{"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-27kvq3ac","versions":[{"created_at":"2026-06-13T21:01:11Z","element_count":73,"note":"5軸GA polish 45->94 by M5 (autonomous)","saved_by":"mcp","sha256":"a7c8751a40eaaedee38098260bbdd3c2d7ad6134c0199dff6279e5051067a429","version":3},{"created_at":"2026-06-13T20:45:24Z","element_count":88,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"24901c340275b4a4b28098d11a8c4237d3d5943ad3d651f7013ed4c4deef003e","version":2},{"created_at":"2026-06-13T20:45:22Z","element_count":88,"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}]}