{"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-90sb3a04","versions":[{"created_at":"2026-06-10T22:52:44Z","element_count":63,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy102533759→quote21038603 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"086be2445279d98ceb0cc8b955d4cbbec078874d839229f6bf23997d35129a2b","version":12},{"created_at":"2026-06-10T15:36:51Z","element_count":73,"note":"5軸GA polish 60->97 by M5 (autonomous)","saved_by":"mcp","sha256":"df824287e5ff0cc57375ddf197fabc882ff47b4309fa0f5c7eb13628291ef213","version":4}]}