Inngest

This is for when you need background jobs and workflows in serverless environments without spinning up queue infrastructure. It handles event-driven processing with durable steps that checkpoint progress, so a failure halfway through a long workflow doesn't mean starting over. The skill covers patterns like fan-out processing, scheduling, and concurrency control. Works especially well for AI pipelines that take minutes to complete, multi-day onboarding flows, or anything where you're processing events at scale but don't want to manage workers. The focus on step functions as automatic failure recovery points is the key insight here.