{"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-8mf9p9pa","versions":[{"created_at":"2026-07-04T19:34:15Z","element_count":83,"note":"5軸GA polish 44->98 by M5 (autonomous)","saved_by":"mcp","sha256":"93aeaa46cfcf2a413aa4ca9c00d4af7c6181189c7f6d7f6cd04f1b6c447e3d7a","version":3},{"created_at":"2026-07-04T19:29:27Z","element_count":87,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"a7a406e0e895ac030a554560f0fc2c71640c802232dcd683775c8c33aafe824b","version":2},{"created_at":"2026-07-04T19:29:27Z","element_count":87,"note":"言葉から生成: LDK+主寝室+子供室+浴室+収納","saved_by":"mcp:create","sha256":"","version":1}]}