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Re:Link rot and redirect madness by sohcahtoa on Thursday December 10, 2015 @04:29PM (#10713621)
Seems that would be better built as a stand-alone spider than a bolt-in to a single blogging platform.
Re:Link rot and redirect madness by showerst on Thursday December 10, 2015 @04:35PM (#10713672)
It looks like there are some wordpress plugins that let you check and at least fix the links, but I don't see anything that takes the extra step of archiving.

https://wordpress.org/plugins/broken-link-checker/