{"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-86naqba8","versions":[{"created_at":"2026-06-10T22:52:43Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy72816480→quote19954947 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"9465d2d6bbd990d1a333a14189eaf869dd00017c115bddf236c7d5df709fc645","version":13},{"created_at":"2026-06-10T15:19:43Z","element_count":84,"note":"5軸GA polish 60->98 by M5 (autonomous)","saved_by":"mcp","sha256":"39107dec546e01257e2fbb88b5ae3ee8d15bfc125aa4ce1df5bfb0e943c120c5","version":5}]}