代理订阅转换的语义保留与差异检查方法

代理订阅的转换结果通常以"生成文件"或"成功导入"表示,但这些事件不能证明地址、认证、插件参数和客户端策略得到保留。本文提出面向明确支持域的字段投影检查方法,将源配置、目标配置、显式节点映射和审阅规则分开处理,使用 field-preserved、transformed、changed、unsupported 与 unknown 五类结果保留差异和不确定性。实现采用 Python 标准库,在本地比较 SIP008 v1 与 sing-box Shadowsocks 出站 JSON,不下载订阅、不运行第三方转换器,也不将配置值或秘密写入报告。对人工编写的 19 个合成案例及 19 项单元测试完成 Linux 运行,分别识别保留、已知等价表示、字段改变、插件丢失、未映射节点和未知策略。所得结果验证检查器在这些样本上的行为,不构成真实转换服务的质量排名、客户端兼容认证或网络连通性证明。

A generated or successfully imported proxy configuration does not establish that endpoint, authentication, plugin, or policy semantics have been preserved. This technical note introduces a bounded field-projection method that separates source and target configurations, an explicit node mapping, and reviewed comparison rules. Results distinguish field-preserved, transformed, changed, unsupported, and unknown states. A Python standard-library implementation locally compares SIP008 v1 documents with sing-box Shadowsocks outbound JSON, without fetching subscriptions, invoking a third-party converter, or exposing configuration values in reports. Linux execution covered 19 manually authored synthetic cases and 19 unit tests, including representation changes, altered fields, plugin loss, unmapped nodes, and unmodeled policies. These results establish the checker's observed behavior on the declared fixtures, rather than conversion-service quality, full client compatibility, or network connectivity.

全文与复现材料:代理订阅转换的语义保留与差异检查方法。