Developed and integrated a straw tube tracker detector within the ALLEGRO simulation framework in the key4hep/k4geo repository, focusing on enhancing simulation fidelity for physics analyses. The work involved implementing the detector’s geometry in C++ and updating XML configuration files to support seamless integration. Adjustments were made to existing tests to ensure comprehensive coverage of the new detector functionality. Utilizing skills in C++ development, CMake, and detector simulation with Geant4, the integration established a modular pathway for future detector additions. This contribution improved the realism of simulation outputs and streamlined validation cycles for downstream users and future development efforts.