{"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-j6y8pokd","versions":[{"created_at":"2026-06-19T06:17:11Z","element_count":90,"note":"5軸GA polish 43->97 by M5 (autonomous)","saved_by":"mcp","sha256":"7ec5afd65e8f8eef28c37cc9e1ff3d00d9854559152279223a669dfcb2e17620","version":3},{"created_at":"2026-06-19T06:08:15Z","element_count":87,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"d23bfdb10b1cbd89d64704590011f7a52173b8e395e761858c701427de879e4c","version":2},{"created_at":"2026-06-19T06:08:13Z","element_count":87,"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}]}