Joris developed support for the Cohere Reranker V3.5 model within the weaviate/weaviate repository, enabling users to leverage improved search relevance and ranking quality. He updated the default reranker model, added V3.5 to the list of available models, and revised validation tests to ensure robust integration. Working primarily with Go, Joris focused on backend development and API integration, ensuring the new model was seamlessly incorporated into existing workflows. The work addressed the need for enhanced reranking capabilities, and the depth of implementation is reflected in the careful updates to both model selection logic and comprehensive test coverage for reliability.