Shai H built a plaintext Chebyshev evaluation function for the openfheorg/openfhe-development repository, enabling numerical approximation workflows on cleartext data that mirror existing ciphertext operations. By designing EvalChebyshevFunctionPtxt with parity to the established ciphertext function, Shai ensured consistent interfaces and reusable testing patterns across both data types. The implementation included header declarations, core logic in C++, and comprehensive tests and usage examples, supporting easier onboarding and validation. Leveraging expertise in C++ development, homomorphic encryption, and numerical methods, Shai’s focused contribution addressed the need for end-to-end coverage of plain data paths, enhancing the project’s flexibility and maintainability for future development.