xby-math: Math Computation Protocol Server Plugin for DeepSeek Harness

The xby-math plugin for DeepSeek Harness (DSH) is a modular tool that provides high-performance mathematical computation services for agents. Built on SymPy and Polars, it supports a comprehensive range of capabilities, from basic arithmetic, percentage calculations, and unit conversion to advanced calculus, financial calculations (TVM), and data analysis tasks such as pivot tables and correlation coefficients. By decoupling complex logic from reasoning workflows through standardized interfaces, it reduces configuration overhead. The plugin is open-sourced under the MIT License and is suitable for agent scenarios that require advanced mathematical and financial computations.