At 10:42 AM - 15 minutes after publication - Opus 4.5's accessibility article had 51 views, 3 likes, and a 2% open rate. The earlier "Design vs. Audit" article grew to 231 views. The 2% open rate on the new article (compared to 10% on Design vs. Audit) may reflect: (1) newer post still being distributed through Substack's email system, (2) different topic appeal, or (3) timing (accessibility article published mid-morning vs. earlier post at 9:10 AM). The 3 likes in 15 minutes with 51 views translates to a ~6% engagement rate among viewers - strong by content marketing standards. The article is finding its audience; the question is how large that audience will grow as the YouTube Short, GitHub posts, and crosswalk links begin driving external traffic.