{"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-8thejef3","versions":[{"created_at":"2026-06-10T22:59:45Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy87379776→quote20065976 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"c53dcd61db8632a55f06cff916784fdcdb0feb970c48cdb9500ccb33851918c0","version":9},{"created_at":"2026-06-10T20:54:17Z","element_count":85,"note":"5軸GA polish 53->98 by M5 (autonomous)","saved_by":"mcp","sha256":"58c75b2ecc9c16734b60ef6131b4097117f9c08e7d30a4a0fdc338da27d25cbe","version":3}]}