| purpose | the filter run is only evaluated if the filter output of all previous runs so far is an empty list |
|---|---|
| input | all titles from previous filter runs |
| output | if the filter output so far is an empty list then the output titles of the run are dominantly appended to the filter's output. if the filter output so far is not an empty list then the run is ignored. |
This prefix has a Shortcut Filter Run Prefix symbol ~run