{"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-j225eqpi","versions":[{"created_at":"2026-06-10T22:59:10Z","element_count":66,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy53236569→quote23180049 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"0d1a9c2d8b1aa243ddc8c7cd718824d5469cf3484442db0ab7d3a2cf1e5e4a18","version":9},{"created_at":"2026-06-10T20:22:38Z","element_count":85,"note":"5軸GA polish 60->94 by M5 (autonomous)","saved_by":"mcp","sha256":"b98e00f50d118062d1906aeb7ee2c71eca11744343073cd0722728e8ed4bc71e","version":2}]}