{"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-mlcl0o9i","versions":[{"created_at":"2026-06-10T23:01:20Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy87379776→quote20821160 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"f2441b2991d07f20ccbd5403d82224bb58383cc6cc04e9128fcd520440469404","version":9},{"created_at":"2026-06-10T22:01:07Z","element_count":84,"note":"5軸GA polish 60->98 by M5 (autonomous)","saved_by":"mcp","sha256":"88f607fb8b5e6ebbbc2f514c828f37c6904c3d2d611f303cbee91cae237a3800","version":3}]}