We added the following fields to the research paper submission form. The goal was to know, as early as possible, how many and what kinds of artifacts to expect (so we could compose an AEC with the skills to review those kinds of artifacts). A second goal was to remind research paper authors that there was going to be an artifact evaluation process (to encourage them to submit, and to encourage them to start packaging their artifact).
We announced the above image on social media to encourage authors to consider submitting an artifact.