{"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-ffqo57ad","versions":[{"created_at":"2026-06-10T22:52:39Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy90050184→quote20131232 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"b83b7e6d0eb40cfdda2c3ad0a544be01fcc262d47588a68f5194fd92d4f67ea4","version":15},{"created_at":"2026-06-10T14:45:57Z","element_count":90,"note":"5軸GA polish 61->98 by M5 (autonomous)","saved_by":"mcp","sha256":"7120b9f804d4bcad2a5b0091938033e8a0e81cfb97ff05963b3d50df0d9db472","version":6}]}