{"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-hktyd3c9","versions":[{"created_at":"2026-06-10T22:57:04Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy53236569→quote19847721 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"4d85f9a2213efabe5e6ab4dd25d2d233a33602a104df91d58cabd3bda531749d","version":9},{"created_at":"2026-06-10T19:02:33Z","element_count":84,"note":"5軸GA polish 54->94 by M5 (autonomous)","saved_by":"mcp","sha256":"75904437743ff5294de26172b299eaee9ea799d5e1b57a6095a93ad6221a9a35","version":2}]}