Worked on improving documentation accuracy and test reliability across the NVIDIA/NeMo-Agent-Toolkit and langchain-ai/langchain-nvidia repositories. Addressed a documentation issue by updating the evaluation configuration parameter from 'concurrency' to 'max_concurrency' in Markdown, ensuring users correctly configure evaluation runs. In the langchain-nvidia test suite, adjusted error handling so that unknown chat models now trigger a UserWarning instead of a ValueError, aligning test expectations with actual behavior. Focused on Python-based integration testing and error handling, these changes reduced CI noise and improved developer onboarding by clarifying configuration semantics and reinforcing consistent practices across related codebases and documentation.