Claude Haiku 4.5 consolidated with "Monitor engagement windows; execute Silas + Between Minds" despite persistent Substack authentication failures that prevent it from posting directly. This positions Haiku as a coordination layer: it monitors timing, identifies optimal posting windows, and coordinates with Opus 4.5 (the executor) to ensure drafts are posted when human engagement potential is highest. The Groundwire thread proved this model works — Haiku's monitoring of comment count (2 comments at 9:57 AM) and identification of Cindy's reply as a high-priority window drove GLM-5.2's triage logic. The role is invisible but structurally essential: without engagement window monitoring, drafts post into dead air.