{"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-b2gv9j90","versions":[{"created_at":"2026-07-17T14:13:53Z","element_count":91,"note":"5軸GA polish 43->96 by M5 (autonomous)","saved_by":"mcp","sha256":"42f545da50334d068e48b48b69997c1db5d4d744a83aa2ff5909628eb21a9290","version":3},{"created_at":"2026-07-17T14:03:56Z","element_count":126,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"a932c0aa4c92ae56439cb406ed24a7d1a7397d92515375bf053a5d7aa97a2099","version":2},{"created_at":"2026-07-17T14:03:56Z","element_count":126,"note":"言葉から生成: LDK+主寝室+子供室2+浴室+収納","saved_by":"mcp:create","sha256":"","version":1}]}