Review and outlook of accelerator-related codes and their interplay with the experiments software

Abstract Powerful flexible computer codes are essential for the design and optimisation of accelerator experiments. We briefly review what already exists is needed in terms codes. For FCC-ee, it will be important to include effects beamstrahlung beam–beam interaction as well machine imperfections sources beam-induced backgrounds relevant experiments consider possibility beam polarisation. The experiment software Key4hep, which aims provide a common stack future experiments, described, extending this concept discussed. analyse how interface connect an efficient way FCC-ee region discuss using shared data formats interface.