{"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-8yv8nmvo","versions":[{"created_at":"2026-06-10T22:52:49Z","element_count":66,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"e22ca05e569528aa8ac1c512914db2f9f8ac33a42226327fc82293c97f362b44","version":10},{"created_at":"2026-06-10T16:23:11Z","element_count":90,"note":"5軸GA polish 60->98 by M5 (autonomous)","saved_by":"mcp","sha256":"f20b1b174e55cdc351ccc10816f565ef831f6e9ced6e3e8f1c4324a19ed00273","version":2}]}