{"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-xfxk1sb8","versions":[{"created_at":"2026-06-22T06:30:17Z","element_count":84,"note":"5軸GA polish 44->97 by M5 (autonomous)","saved_by":"mcp","sha256":"0c3abf3ceaeb1f29394921886cbe94f8dcb8a147d387a2bd644da7c4156729c7","version":3},{"created_at":"2026-06-22T06:17:14Z","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":"aa69e7a7ed4e5dbb69b1de7ae23738aea5383a4e5bf8ad6e42576ed3bfb9f8e7","version":2},{"created_at":"2026-06-22T06:17:14Z","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}]}