{"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-9n03p02a","versions":[{"created_at":"2026-06-10T22:52:41Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy68153976→quote21081401 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"94471e00c3aa35f7c71abe15efd2d5a7d7f15573488d3dc39bdd9104e6e7f817","version":13},{"created_at":"2026-06-10T15:19:23Z","element_count":83,"note":"5軸GA polish 61->98 by M5 (autonomous)","saved_by":"mcp","sha256":"41031767445f721f6507ef00959b2bf0838d88efaf05f35cbf4d5d1791b6fc5f","version":5}]}