Any update on this? Could it be triaged and marked with a priority level, say, P1 :)

@devoncarew do we still have someone working on dartdoc?

@keertip is working on it, but it's not her main task; contributions are welcome here.

@devoncarew - Thanks for the update. Could we at least assign a priority level to this issue?
And maybe tag it as help wanted too?

Is this a request for external linkage to api.dartlang.org, or a request for auto-include-dependencies to do this?

The former, I think.

I believe it's a request for externally generated API doc that uses SDK classes to link to the SDK doc, by default. E.g. if an external package (say, args) has a property that's a Map (say, commands), most people would want to be able to click Map and get to https://api.dartlang.org/stable/dart-core/Map-class.html.

Options might be to (1) not generate those links or (2) link to a particular version of the SDK API docs. These links should probably have different default formatting from links inside the same package.

OK. #1368 addressed the latter, the former is definitely on my radar though. Going to adjust the title of the issue to be more clear.

1524 should make this much easier. Dartdoc now has some elementary package-boundary awareness that we can use to determine whether alternate hyperlinks should be generated, so it's now just a matter of implementing the generation.