List workflows

List all workflows related to a CRD 

argo list -l workflow.artifakt.io/kind=[kind] -n [ns]

List all failed workflows 

argo list -l workflows.argoproj.io/phase=Failed -n [ns]

Delete Failed workflows

argo delete -l workflows.argoproj.io/phase=Failed -n [ns]
argo delete -l workflows.argoproj.io/phase=Failed,workflow.artifakt.io/kind=[kind] -n [ns]