
When Your SIS and LMS Don't Speak: The Sidecar Solution
This article diagnoses the SIS modernization crisis in K-12 and higher education and proposes an incremental, event-driven sidecar middleware pattern—using CDC, OneRoster, Ed-Fi, and LTI Advantage—to decouple legacy SIS platforms from LMS and AI tools, reduce SaaS concentration risk exposed by the May 2026 Canvas ransomware outage, and ensure operational continuity, scalability, and regulatory compliance.










