{"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-vlb0s5v9","versions":[{"created_at":"2026-06-10T22:55:01Z","element_count":62,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy96334560→quote22615183 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"a9bec74add2b9cf502e3b448cb60f6ed139d31debc0a13c7aec0c636a6a3b557","version":10},{"created_at":"2026-06-10T17:56:45Z","element_count":73,"note":"5軸GA polish 54->96 by M5 (autonomous)","saved_by":"mcp","sha256":"e93d8ace89206bb9a02cf7c5ee2b25cdf29eae406d76793cd47a2f96cf83cafe","version":3}]}