{"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-gem2vtnk","versions":[{"created_at":"2026-06-10T22:52:44Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy87379776→quote19504363 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"374fa23d34dfa889687a3a169b961518cded7738f3e7f14230f9ac789dc75f45","version":12},{"created_at":"2026-06-10T15:36:53Z","element_count":84,"note":"5軸GA polish 54->98 by M5 (autonomous)","saved_by":"mcp","sha256":"69f958a3599a7aa85917724fcab37c44cd1b55d467eb2ca437119c91507c4b79","version":4}]}