问HN：可变种子的支持现状如何？
BEP 46 多年前就已经发布了。从那时起，许多文章讨论了可变种子（mutable torrents）将会是多么伟大的事情；人们也表示 libtorrent 支持它们。然而，当我四处查看时，却在主要的 BitTorrent 客户端文档中找不到任何关于它们的提及；而且，至少五年前的概念验证代码需要一些侦探工作才能满足 `npm install` 的要求。那么，事情的现状就是这样吗？一个 BEP，一些关于它会很酷的思考，还有损坏的代码？有没有可用的工具？如果有的话，在哪里可以找到？
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BEP 46 was published years ago. Since then, plenty of articles have talked about what a great thing mutable torrents would be; and people have indicated that libtorrent supports them. When I look around, though, I can't find any mention of them in the documentation for major Bittorrent clients; and the proofs of concept, at least five years old, will require a bit of detective work to satisfy `npm install`. So, is that where things stand? A BEP, some musing that it would be cool, and broken code? Are there tools that work? If so, where?