AgentCore 0.16.1

Fixed

• Runaway retry no longer expands the output cap past the model's limit when the client is driven through an LLMFallbackChain. The chain binds one max_tokens for whichever leg serves the request, so expansion is now clamped to the smallest declared output limit among its legs instead of reading a capabilities attribute the chain does not expose; a chain whose legs declare no limit keeps the previous context-bounded behaviour.