Unfurl short form issue references

[kantarjiev]

Before installing the github integration, our organization was in the habit of referring to issues with a shorthand of the form repository#123. This is ... useful, but doesn't trigger the unfurling and link preview.

It would be great to be able to right click/hover strings of this form and get a link preview.

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[miguelhughes]

yes! some sort of shorthanding would definitely be usefull. I hate to have to type (or copy paste) the whole github url every time

[brianv0]

This would be nice. I've implemented this before. It requires you to listen to a message, however, because you can only "unfurl" URLs, not the shorthand org/repo#1234 forms. Still - it'd be nice (was curious if the state of things changed - it hasn't, that's why I'm commenting)