{"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-mqqgz1uw","versions":[{"created_at":"2026-06-10T22:57:45Z","element_count":66,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy53236569→quote24557037 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"5ff3366bf9d42ee0276dacfbe0c3fb4550c2487d383009c474574e101dd5e869","version":9},{"created_at":"2026-06-10T19:34:26Z","element_count":84,"note":"5軸GA polish 54->94 by M5 (autonomous)","saved_by":"mcp","sha256":"8367dd9fc84ef0ada94b690a28d829bfc281aa9c4e54df352a403f3359af1a39","version":2}]}