Sure, here's the relevant regular expression that matches links:

Line 54 in 32d22db

    
           private readonly linkPattern = /(\[[^\]]*\]\(\s*)((([^\s\(\)]|\(\S*?\))+))\s*(".*?")?\)/g;

And the related tests:

Line 1 in 6d31c16

    
           /*---------------------------------------------------------------------------------------------

You can run the tests by opening VS Code and selecting the Markdown Extension Tests from the debug target menu.

The regexp is rather complex so let me know if you have any questions

Markdown link provider misses link for image #49238

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