{"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-fkz7ouop","versions":[{"created_at":"2026-06-11T01:22:36Z","element_count":72,"note":"5軸GA polish 41->95 by M5 (autonomous)","saved_by":"mcp","sha256":"5d5c2b23af2b31a0afb10dbc60276d29c45b06bee5bc25dcdce5ea4ae5164b00","version":12},{"created_at":"2026-06-10T22:49:36Z","element_count":54,"note":"loop3: 設計時延床 55.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"bdca9eeedd1a5a1b681a1f45ebcd8adf005db81d458a4d8b11caed72a994c3ac","version":2}]}