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Completely agree on both fronts. On loop guardrails, that silent green 200 OK failure mode is exactly what burns budgets before anyone notices an issue.Your point on failover contract integrity is critical. Surviving at the transport layer means nothing if downstream Pydantic or Zod parsers choke on subtle tool-call formatting shifts or refusal semantics between providers. We currently normalize shapes between Anthropic and OpenAI, but active bi-directional schema validation before handing off the failover response is an essential guarantee.Taking this directly into our backlog for the next release. Appreciate the sharp architectural eye.