{"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-g9zehu4m","versions":[{"created_at":"2026-06-10T23:07:05Z","element_count":65,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy96334560→quote23345656 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"c88557121e9a0ad36f8fca94711f004752a638014a5f50d75ebc0136bbe6dfd5","version":9},{"created_at":"2026-06-10T22:50:57Z","element_count":72,"note":"5軸GA polish 61->96 by M5 (autonomous)","saved_by":"mcp","sha256":"37fc36f901c04a95f104f19c7b2af1dd8e86ec94678cf21da17ed94fa62a4721","version":7}]}