Worked on the vercel/ai repository to deliver a corrected server-side chat example that enables PDF-based chat functionality using Anthropic Claude Sonnet. The work involved updating JavaScript code and documentation to replace OpenAI references with the @ai-sdk/anthropic integration, ensuring alignment with provider requirements. The developer focused on full stack development and API integration, validating the changes locally by uploading PDFs, parsing them with Claude, and verifying streaming responses. This update improved the accuracy of onboarding materials and reduced potential support issues by ensuring the example code and documentation matched the actual implementation for Anthropic-based chat workflows.