cat contact.md
Mail is the reliable channel: hi@asfeng.dev. I read everything, and I answer most things.
For a specific post, there may be a thread. Some pieces — usually the ones with data or code behind them — get a public repository of their own, holding the artifacts and the discussion together. Where that exists, the post ends with its issue list and a link to add to it, and replying needs nothing more than a GitHub account.
Most posts have no thread, on purpose. A comment box under something nobody was invited to discuss is furniture.
Elsewhere: GitHub, Google Scholar, LinkedIn.