fix(mcp): close mcp client event loop (#1321)

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Co-authored-by: David Padbury <padbury@amazon.com>
Co-authored-by: Dean Schmigelski <dbschmigelski+github@gmail.com>

test(steering): adjust integ test system prompts to reduce flakiness (#…

…1282)

fix: fix integ test for mcp eclicitation_server (#1234)

fix(a2a): base64 decode byte data before placing in ContentBlocks (#1195

)

fix(models): allow setter on system_prompt and system_prompt_content (#…

…1171)

feat(models): add SystemContentBlock support for provider-agnostic ca…

…ching (#1112)

* feat(model): support prompt caching via SystemContentBlock

* fix: concat text blocks for system_prompt

* remove litellm and openai changes for now

* integ tests

* linting

* linting

* fix test

* add test cases

Transform invalid tool usages on sending, not on initial detection (#…

…1091)

Per bug #1069, session-managers never persist tool-name changes after we initially persist the message, which means once an agent generates an invalid-tool name, that message history is poisoned  on re-hydration.  To avoid that going forward, do the translation of invalid-tool names on sending to the provider and not on the initial tool_use detection.  The initial tool_use detection is needed to add a tool_response with a proper error message for the LLM, but this will avoid the poisoning issue

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Co-authored-by: Mackenzie Zastrow <zastrowm@users.noreply.github.com>

interrupts - decorated tools (#1041)

Fix additional_args passing in SageMakerAIModel (#983)

* fix(sagemaker): additional_args dict issue

Fix error where passing an additional_args dict to SageMakerAIModel
would raise an AttributeError because Python dicts have no '__dict__'
attribute.

Fixes #982

* fix(sagemaker): typing for endpoint_config

Fix typing for SageMakerAIModel.endpoint_config which was previously
being treated as an arbitrary dictionary due to init assignment.

* fix(sagemaker): Typing for payload_config

Fix typing for SageMakerAIModel.payload_config, which was previously
being treated as a plain dict due to init assignment.

* test(sagemaker): tests for ep additional_args

Add a test to check for insertion of endpoint config additional_args

* fix(sagemaker): include payload additional_args

Copy SageMakerAIPayloadSchema's additional_args into request payloads
where provided - previously these were being ignored. Includes unit
tests.

fix(litellm): map LiteLLM context-window errors to ContextWindowOverf…

…lowException (#994)