During April 2025, contributed to the langgenius/dify repository by delivering an enhanced Datasets API that introduced a reranking_mode feature, enabling weighted scoring and configurable models to improve search relevance. The work focused on backward-compatible API design, allowing for fine-grained control over ranking without disrupting existing integrations. Collaborated closely with product and QA teams to validate the integration and ensure measurable improvements in user task success. Leveraged JavaScript for full stack and API development, applying feature flagging and extension strategies to support flexible model configuration. The approach emphasized commit-driven development and cross-functional teamwork to address evolving product requirements.