langchain-aws==1.0.0a1

What's Changed

• Support multiple system messages for Anthropic by @michaelnchin in #572
• fix: Set bedrock_client region name to runtime client value when needed by @michaelnchin in #592
• chore: add SECURITY.md by @mdrxy in #636
• chore: add CONTRIBUTING.md by @mdrxy in #637
• fix(aws): (bedrock) support thinking blocks in streaming, multi-turn contexts by @ccurme in #638
• Add chat model integration tests for multiple system messages by @michaelnchin in #634
• fix: Optimize base model identification for application inference profiles by @michaelnchin in #615
• fix: Final assistant content cannot end with trailing whitespace by @michaelnchin in #599
• fix(bedrock): disallow forced tool_choice when thinking is enabled on Claude 3.7 by @jitokim in #640
• Allow all claude models with thinking enabled to accept tool_choice = "auto" + update associated code and tests by @awg66 in #646

New Contributors

• @jitokim made their first contribution in #640
• @awg66 made their first contribution in #646

Full Changelog: langchain-aws==0.2.33...langchain-aws==1.0.0a1