{"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-jsfjou04","versions":[{"created_at":"2026-06-13T20:46:42Z","element_count":91,"note":"5軸GA polish 44->97 by M5 (autonomous)","saved_by":"mcp","sha256":"b6a7f6147c100ecdbb9dd6b7dea3303fa228ec0c8df83e67fa46348f295b53c2","version":3},{"created_at":"2026-06-13T20:37:46Z","element_count":105,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"c505009a900ed21ea63809a7a071386ce65cb7601294ba7bca1ae9a93d482a70","version":2},{"created_at":"2026-06-13T20:37:45Z","element_count":105,"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}]}