Worked on enhancing the robustness of PCHIP interpolation within the SciML/DataInterpolations.jl repository by addressing edge-case slope calculations at endpoints. Focused on improving the correctness of du_PCHIP by implementing a dedicated helper function to validate and compute endpoint slopes, centralizing edge-case logic for better maintainability. This update reduced the risk of incorrect end-point interpolation, thereby increasing reliability in downstream data analytics pipelines. The work demonstrated strong skills in numerical analysis, interpolation, and software engineering using Julia, with careful attention to algorithmic rigor and code quality in an open-source environment. Contributed a targeted bug fix that improved overall workflow reliability.