{"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-bz4k7css","versions":[{"created_at":"2026-07-20T06:30:05Z","element_count":70,"note":"5軸GA polish 45->94 by M5 (autonomous)","saved_by":"mcp","sha256":"1690f0327dd70d5e4570aba2a6f0d98dd8eb78b3b2ec305d61e3ab6b408b35c4","version":3},{"created_at":"2026-07-20T06:18:06Z","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":"6f21bb4ff14b6eca017be664cd494eaf2ce4a3a562fe6820d28a835da399fc4d","version":2},{"created_at":"2026-07-20T06:18:06Z","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}]}