{"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-mmy1tl5e","versions":[{"created_at":"2026-06-15T06:20:56Z","element_count":73,"note":"5軸GA polish 41->92 by M5 (autonomous)","saved_by":"mcp","sha256":"9332f899a4d8cee864b2b0705d30ede63ffc5838a950700ff0de2f0b6f3b36d8","version":3},{"created_at":"2026-06-15T06:08:21Z","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":"25cdf7b0c39ff12871bed6c9e52540baa07eda7c2027953a99f0772d14ab2f1d","version":2},{"created_at":"2026-06-15T06:08:21Z","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}]}