A Migrate plugin that could convert basic <a href="node/123"> links into the required format would be really useful, both because lots of sites used that structure, and it could be useful as an example for people on how to build custom plugins for their own scenarios.
It would need to replace <a href="node/123"> links with the following structure:
<a data-entity-substitution="canonical" data-entity-type="node" data-entity-uuid="f52dbbd3-17cb-4d7f-8d65-f136645298db" href="/node/123">
Needs work
7.0
Code
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It's likely this issue predates Contrib.social: some issue and comment data are missing.
This needs work to make it cover additional scenarios.
Back to "needs work" per #9, #11, etc.