Key4hep — Turnkey Software for Future Colliders

Future collider experiments rely on a well-maintained software for their physics performance studies and detector optimisation. The Key4hep project aims to design and provide a common set of software tools that can be used by future or even present-day high-energy physics projects. It unites the communities of all current future collider projects. These proceedings give an overview of the goals of the Key4hep project and briefly describe the main components that are currently under development: the common event data model, EDM4hep, the detector description toolkit, DD4hep, the interfaces to Delphes, a brief description of the core framework and, finally, the infrastructure to deploy and build the whole software stack using spack. They also include some details about how different communities plan to adapt their software stacks to the Key4hep project. Overall, they show that the Key4hep software stack can be used already for first physics studies and highlight its potential as a baseline for future high-energy physics experiments.