Error Handling And Fallback To Human Escalation

via “error handling and fallback routing for failed agent requests”

Adds custom API routes to be compatible with the AI SDK UI parts

Unique: Provides error handling specifically designed for agent execution failures, with built-in support for error classification, fallback routing, and recovery strategies, rather than generic HTTP error handling that doesn't understand agent-specific failure modes

vs others: More specialized than generic error handling middleware because it understands agent execution semantics and can implement intelligent fallback strategies, whereas generic middleware can only catch and log errors