Certain use cases of Dagger require supporting long-running execution: running a DAG that will never terminate. This is different from today, where dagger up is expected to terminate, and might be force-terminated and return an error after a timeout period.

How do we support long-running execution without breaking support for regular, short-running execution? How do we allow both execution modes to co-exist, in a way that makes sense to the developer and the end-user?