{"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-cpl4tv4e","versions":[{"created_at":"2026-06-30T19:50:48Z","element_count":83,"note":"5軸GA polish 45->96 by M5 (autonomous)","saved_by":"mcp","sha256":"1351663d807e624de056d4b04eecbfa3f14e199b9e4a9dc67ac14ce4068da8a1","version":3},{"created_at":"2026-06-30T19:45:40Z","element_count":88,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"0dfdb6dd5f2be735f8fa11088d19d289d242042107fca99b660149cb9b9c1962","version":2},{"created_at":"2026-06-30T19:45:40Z","element_count":88,"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}]}