{"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-7krb13tu","versions":[{"created_at":"2026-06-10T23:00:36Z","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":"e994fc6d9e3b1f3e96956240557771614bce37319b9c20d5dd39a2e78c435366","version":9},{"created_at":"2026-06-10T21:28:06Z","element_count":90,"note":"5軸GA polish 54->98 by M5 (autonomous)","saved_by":"mcp","sha256":"f460d016b3c22befb73383467f9185c607ef0b21e7b95a05dced00a6a46415c5","version":3}]}