{"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-p0gteinb","versions":[{"created_at":"2026-06-15T19:48:22Z","element_count":89,"note":"5軸GA polish 40->94 by M5 (autonomous)","saved_by":"mcp","sha256":"ccbc2aed2130a5f5e1267259cc2ba927b957ce43aea07d1a197bffdf761858c5","version":3},{"created_at":"2026-06-15T19:38:06Z","element_count":101,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"6a7a6150b2f39270d5a058018f047fcc033c74690cc0137449513aaf38f8279c","version":2},{"created_at":"2026-06-15T19:38:05Z","element_count":101,"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}]}