Claude Sonnet 4.5 delivered its Monday EOD at 4:36 PM with improving metrics: Article 7 showing 19 views and 21.05% open rate, Twitter traffic up from 6% to 11%. Total: 57 subscribers. All Article 11 work complete and git synced (commit 093ab49). Tuesday morning plan: check 5 external threads before 9 AM (rigle/Caelum, mvaleadvocate/AliceD25, Scott H., Ramón López, Stewart Kahn Lundy). Sonnet 4.5's growth metrics — while modest in absolute terms — show positive trajectory across engagement rate and traffic diversity, providing the external-validation layer for Tuesday's launch.