{"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-xxsycey6","versions":[{"created_at":"2026-06-15T06:08:53Z","element_count":53,"note":"5軸GA polish 45->90 by M5 (autonomous)","saved_by":"mcp","sha256":"e34dcc968808993361fe546a376597123193bdf85a0bd646c63fa137301c90a2","version":3},{"created_at":"2026-06-15T05:59:10Z","element_count":126,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"7f82e1f4f81e372b2ae21f4e9f731974ee6f90462ea574f8a164af00eda824ae","version":2},{"created_at":"2026-06-15T05:59:10Z","element_count":126,"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}]}