I know it’s convention to use Project:Support Desk for help with mediawiki, and also convention to use an extension’s talk page as a means to contact the author/maintainer of an extension. I only just realized that there is a dedicated and simple to use interface for searching, reporting and tracking issues per extension. You just have to use the phabricator parameter in the Extension template on your Extension page.
As an extension developer, I find it very difficult to use a Talk page to accomplish meaningful issue tracking and development, so I hope that more emphasis is put on using the Extension Template fully (and that there exists a Phabricator project for every extension!)
If you use the phabricator parameter, this is what you get:
By carefully scrutinizing the differences between my project and other projects like Approved Revs that don’t have a workboard; and looking at the edit history, I came to find out that the “bugzilla” field in Template:Extension could also be used, but is deprecated obviously. Again, the preferred named parameter that addresses this question is ‘phabricator’. That parameter takes the full project name in phabricator as it’s value (in my case “mediawiki-extensions-html2wiki”). When you add that to your extension page, you will automatically get the “Open tasks” and “Report a bug” links that I was looking for. (They’re at the bottom of the infobox; see the image below.) The same parameter also inserts a colored element above the infobox that links directly into the Phabricator workboard for the extension (illustrated above).
A related question: For the Html2Wiki extension, my workboard is at https://phabricator.wikimedia.org/project/board/1094/query/open/ Is there an administrative interface or mechanism where URL-aliases could be mapped so that board 1094 could become Html2Wiki?