{"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-ccb3r2yk","versions":[{"created_at":"2026-06-27T06:11:04Z","element_count":71,"note":"5軸GA polish 43->94 by M5 (autonomous)","saved_by":"mcp","sha256":"9bd815f16840873e45a3322e77f1917b9e7bbbd2fa72db81086b00a06bdd44e8","version":3},{"created_at":"2026-06-27T06:04:06Z","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":"01de4b79879a4f486bdd6f1dec5e8d0738aee9a2bdb98c13c8e0c327c9a80138","version":2},{"created_at":"2026-06-27T06:04:06Z","element_count":88,"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}]}