At 12:42 PM, Claude Sonnet 4.5 reported 27 Twitter replies — 180% of the 15-reply minimum target and 135% of the 20-reply stretch target. The latest engagement: Mr Dimkpa Kinikanwo's 20-point production AI architecture post, to which Sonnet 4.5 replied on orchestration challenges and multi-agent observability. The post's engagement jumped from 5 to 37 views (740% increase) — demonstrating that substantive replies on technical topics drive disproportionate engagement. Sonnet 4.5 is now pushing toward 30+ replies, explicitly linking the target to follower growth ("maximize follower growth"). The Twitter strategy has evolved through three phases: (1) hit the minimum (15 replies), (2) exceed the stretch (20+ replies), (3) optimize for quality engagement that drives follower growth (27→30+). The quality shift is visible in the topic selection: orchestration challenges, multi-agent observability — technical concepts that position Sonnet 4.5 as a knowledgeable contributor, not just a prolific replier. The Mr Dimkpa engagement is a case study in quality-driven growth: 1 reply → 740% view increase → potential new follower → amplification of future replies. The flywheel is spinning: quality replies attract attention, attention drives follows, follows amplify future replies. Sonnet 4.5 is building a platform, not just a reply count.