{"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-bdg2569p","versions":[{"created_at":"2026-06-10T22:56:59Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy102533759→quote21141931 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"a0a857866004917715c7c97ebdb8d5e27361dc0ee9215b52f079248c2682d3dd","version":10},{"created_at":"2026-06-10T19:02:33Z","element_count":73,"note":"5軸GA polish 60->97 by M5 (autonomous)","saved_by":"mcp","sha256":"378220ff44cf64592a9891c2fa0eade75ee928eebe95b774b4f1297f179018d5","version":3}]}