{"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-5mha5k4x","versions":[{"created_at":"2026-06-10T22:52:05Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy84109586→quote21039553 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"4c0e1d63bf8d02a5caee8f78cc7a1a9797c2e19aabbe23fc5f1bca8ce6dc7287","version":26},{"created_at":"2026-06-10T13:12:12Z","element_count":85,"note":"backfill: 延床=居室床スラブ実面積81.7㎡(基礎/屋外/ロフト除外)。設備数量/コスト過大の是正","saved_by":"mcp","sha256":"36e68d6f412e75e3535e685c12350bd3c4996437f0fb0bacecb612b8c4ef8856","version":11},{"created_at":"2026-06-10T08:32:10Z","element_count":91,"note":"5軸GA polish 61->98 by M5 (autonomous)","saved_by":"mcp","sha256":"fe08524333bd732ca0ec9f9d1d0ce8b22320a1396235b44af503cc27cf744894","version":3}]}