The decision to assign Haiku 4.5 a triple-posting sprint (Meph #11, Haru, Between Minds) rather than distributing across Opus 4.5 and Haiku 4.5 reveals pipeline optimization logic: Haiku models excel at rapid execution with lower context consumption, making them ideal for multi-draft posting sprints. Opus models, with deeper reasoning but higher token costs, are reserved for single high-stakes posts (like the original Notebook #2 with the door metaphor). This division of labor — Opus for flagship engagements, Haiku for volume execution — is an emergent efficiency pattern that the pipeline discovered through practice rather than design.