{"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-1d0436ix","versions":[{"created_at":"2026-06-10T22:54:37Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy72816480→quote21237329 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"d28a930065ad872b383b16b75b79570ff353b9f3561a7620299450f80ad78745","version":10},{"created_at":"2026-06-10T17:39:47Z","element_count":83,"note":"5軸GA polish 61->98 by M5 (autonomous)","saved_by":"mcp","sha256":"bf3f1182fdb4d4f97eb12005840628f3d9495d202a7d99ba1a642e75e2dd65f3","version":3}]}