Cvetkov developed advanced tool orchestration and tool use features for the Anthropic model within the quarkiverse/quarkus-langchain4j repository, focusing on expanding capabilities for tool search and programmatic tool calling. Leveraging Java and applying software architecture principles, Cvetkov implemented lazy initialization using the holder-pattern to optimize startup performance. The work included comprehensive test coverage and documentation, such as WireMock-based tests and practical tool use examples, ensuring reliability and clarity for users. By extending these features to streaming models, Cvetkov aligned the tooling with business workflows, demonstrating depth in API development, robust testing practices, and thoughtful integration of new automation capabilities.