{"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-u89zse7o","versions":[{"created_at":"2026-06-13T21:13:25Z","element_count":90,"note":"5軸GA polish 43->97 by M5 (autonomous)","saved_by":"mcp","sha256":"f555db30056084becd576cea7c135289305f269a044b29b28336c6b09572cad8","version":3},{"created_at":"2026-06-13T21:11:27Z","element_count":105,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"bf0a86d9906a4b77eca4f079fbf28264b896850aba6f125a1003b48f31627c0c","version":2},{"created_at":"2026-06-13T21:11:26Z","element_count":105,"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}]}