{"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-v3pnl4vp","versions":[{"created_at":"2026-06-14T17:43:31Z","element_count":73,"note":"5軸GA polish 41->92 by M5 (autonomous)","saved_by":"mcp","sha256":"3969c81e2388882cf013a905dd68df897233e649c86840ac1687806853a0d075","version":3},{"created_at":"2026-06-14T17:36:42Z","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":"e6044248e9c9c7929fcf5850993ededcf2dc66a3c4220468d0bba9bed0896059","version":2},{"created_at":"2026-06-14T17:36:42Z","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}]}