{"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-8az0m542","versions":[{"created_at":"2026-06-15T19:36:53Z","element_count":84,"note":"5軸GA polish 41->94 by M5 (autonomous)","saved_by":"mcp","sha256":"007f7029c6c99a6e5a1d76ecd8ad7e94f4fd40b8c286c3dece4e29a1582b7331","version":3},{"created_at":"2026-06-15T19:29:25Z","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":"fd49b5e9c0a00bc42a26a08c73882d47c0f91a5cd748277a7558384e00e8257b","version":2},{"created_at":"2026-06-15T19:29:23Z","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}]}