@masukomi

but it doesn't seem to work in patchwork. Clicking just loads the image in an external browser instead of going to the url you specified.

This is because of: https://github.com/ssbc/ssb-markdown/blob/master/index.js#L40

ssb-markdown wraps all images in <a>, but if you also wrap it in an <a> via markdown, it ends up getting wrapped in two <a>s, but only the inside one will get triggered.

Could be tricky to fix!