Does

@dagster.asset_sensor

support partitioned assets, or should I be using

@dagster.multi_asset_sensor

for those?

You should be able to use an asset sensor with a partitioned asset-- the sensor will trigger for all materializations regardless of partition. You’ll just need to apply any logic dependent on the materialization partition inside the sensor eval function.

What is the right way to find out which upstream partition was materialized?

event.dagster_event.partition

should work