{"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-3xp6onf7","versions":[{"created_at":"2026-06-14T06:08:45Z","element_count":83,"note":"5軸GA polish 46->98 by M5 (autonomous)","saved_by":"mcp","sha256":"647b5baaf2dd1ad4b00f3c85103acd69fafb2f324764f1b5d0eeee3d64ef5789","version":3},{"created_at":"2026-06-14T06:01:12Z","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":"6a100a507c7e545c2df1e2ca1b23bcc21098032c7a29f079b787a116b84e98b0","version":2},{"created_at":"2026-06-14T06:01:11Z","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}]}