{"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-1bp22y77","versions":[{"created_at":"2026-06-10T23:06:17Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy75991608→quote24371566 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"d6239844b13dc5f639d1c41a9a0a3da000ea9f89f653f30bd82eb78344c9b2f0","version":9},{"created_at":"2026-06-10T22:34:56Z","element_count":91,"note":"5軸GA polish 56->97 by M5 (autonomous)","saved_by":"mcp","sha256":"573ba4c88d55e568bdc7be2c6ff8d52ffcbc2a040c774fa2ac7710f285740f1e","version":6}]}