Sorry if this has already been suggested. It would be useful to have a way to specify custom actions which take place after Picard finishes tagging an album (i.e. launching an external executable/script with the album path and/or tags as part of the argument list). This would drastically improve music ingest workflows involving other utilities, for instance using the COV Integration Tool to rapidly choose and save artwork from one of several online sources. Currently, as far as I can tell, the only way to achieve a similar functionality would be through writing a custom Picard plugin, something the average user can't be expected to do. My vision for this feature includes options like "wait for process to exit", "open maximized/minimized/hidden", "refresh tags after exit" etc.