{"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-3a46g5q0","versions":[{"created_at":"2026-06-10T23:01:00Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy96334560→quote21425095 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"5c1ee1bdb8ed4ad7c5b68cb2d5493cdfc72c48b228ae5b77df18d5709f9472dd","version":9},{"created_at":"2026-06-10T22:01:05Z","element_count":72,"note":"5軸GA polish 61->96 by M5 (autonomous)","saved_by":"mcp","sha256":"b0096c179c8f6a2a7c7fa0d5fc41a79871598f24f2906b968dd0ddd1b5fc4635","version":3}]}