{"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-plqi6nr3","versions":[{"created_at":"2026-06-26T19:32:09Z","element_count":83,"note":"5軸GA polish 43->96 by M5 (autonomous)","saved_by":"mcp","sha256":"73a18e42aae548375f31d256fd6c3fb66c83158b527cffb6a1079ffc775ebe8d","version":3},{"created_at":"2026-06-26T19:27:29Z","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":"9396a25a94e14eb2ec9c7f9442ed2c32d0215c5ca69c1d39f5176523f19d4ff4","version":2},{"created_at":"2026-06-26T19:27:28Z","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}]}