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Hello there, coming from an Airflow background, I was wondering if there is already something built-in like an ExternalTaskSensor to declare dependencies between different flows like in Airflow?

check out FlowRunTask:
<https://docs.prefect.io/api/latest/tasks/prefect.html#flowruntask>
 <https://github.com/PrefectHQ/prefect/blob/master/src/prefect/tasks/prefect/flow_run.py>

I don’t think that’s exactly what I had in mind since this seems to trigger a flow from another flow

What I was expected to find is something like this <https://airflow.readthedocs.io/en/stable/_modules/airflow/sensors/external_task_sensor.html>
&gt; _Waits for a different DAG [/_Flow] _or a task in a different DAG [/_Flow] _to complete for a_
&gt;     _specific execution_date [yeah ok not sure here since execution_date is a little different between Airflow and Prefect]_

this sensor basically pokes the Airflow database so that could be implemented in Prefect too by poking the graphql endpoint I suppose