{"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-lindengrovebungalow-043hjszi","versions":[{"created_at":"2026-06-13T18:06:22Z","element_count":70,"note":"5軸GA polish 47->96 by M5 (autonomous)","saved_by":"mcp","sha256":"332cc9083940a2daea40855334410f1579942bc26e07c1d6f9a492d6ec5f478f","version":3},{"created_at":"2026-06-13T17:52:45Z","element_count":134,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"7407eb36d832e3512218fe981619c8f502bf43187fb5f415113b01bd85819cda","version":2},{"created_at":"2026-06-13T17:52:44Z","element_count":134,"note":"言葉から生成: LDK+main bedroom+2 kids rooms+bathroom+storage","saved_by":"mcp:create","sha256":"","version":1}]}