That's nonsense. If what felixrieseberg said is true this is very clearly a compromise of Cursor and not Anthropic. Trying to spin it as a compromise of Anthropic is absurd.
I don't think they're trying to spin this as Anthropic being compromised, but I do think they're correct in saying this is Anthropic's problem to deal with now, regardless of the fact that they're not responsible for the root cause.
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If you decided to use an umbrella to protect something during a hurricane and umbrella breaks and your thing is ruined. Whose fault is that?
Distributing signed artifacts is a solved problem (until NP=P is cracked at least).
That is not what was written; what was described was anthropic losing control over their cursor account - perhaps a key compromise, developer laptop compromise, or a fault in cursor, but of the three, the language suggests the first two.
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I think he's saying (erroneously) Anthropic owns Cursor. Reading this claude.com page [1] hawking Cursor you could be forgiven for forming that impression.