fix: aws agent events

[edwinjosechittilappilly]

This pull request introduces enhanced support for AWS Anthropic function call streaming in the agent event handling logic. The main changes focus on detecting, processing, and cleaning up AWS Anthropic-specific markup in streaming agent messages, ensuring a smoother and more accurate user experience. Additionally, the dependency specification for langchain-aws is updated for broader compatibility.

AWS Anthropic function call streaming support

• Added global state management (_aws_anthropic_state) and helper functions to detect, accumulate, process, and clean AWS Anthropic function call markup in streamed agent text (src/lfx/src/lfx/base/agents/events.py). [1] [2]
• Updated handle_on_chain_stream to always accumulate text for Anthropic processing, clean up markup, and only send new, cleaned text chunks to the agent message (src/lfx/src/lfx/base/agents/events.py).
• Modified handle_on_chain_end to perform final processing and cleanup of any remaining AWS Anthropic function call markup before completing the agent message (src/lfx/src/lfx/base/agents/events.py).
• Ensured Anthropic state is reset at the start of each chain for correct processing (src/lfx/src/lfx/base/agents/events.py).

Dependency update

• Changed langchain-aws dependency from an exact version to a minimum version requirement for improved compatibility (pyproject.toml).

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✨ Finishing Touches

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[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[Cristhianzl]

please follow up this PR #9822