During January 2026, the developer enhanced the sympy/sympy repository by adding comprehensive docstrings to the Rational class’s numerator and denominator properties. This work focused on improving API documentation and making the codebase more accessible for both new and existing contributors. Using Python and established documentation conventions, the developer ensured that the new docstrings aligned with project standards and addressed open documentation issues. The approach demonstrated a strong understanding of object-oriented programming and clear commit messaging. While the contribution was focused on a single feature, it provided tangible improvements in code clarity and onboarding efficiency for the sympy development community.