The IndieAuth plugin limits capabilities based on scope as of Version 3.5.0, so the capability checks will work perfectly.
On a practical note, this allows the code to be simpler on the Micropub side. The scope limiting code is unit tested now inside the IndieAuth plugin and will continue to be iterated on there.
This allows Micropub to focus on the publishing side of things. Also, there was a request to remove a dependency on IndieAuth.com as the default for the built-in code. The IndieAuth plugin has no external site dependencies by default.
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