The Progress Badge Plugin included with Rundeck Pro can create graphic badges to be rendered on the Log Output tab.
See also: Progress Badge Log Filter (Pro).
Render a single badge using input options:
To use some emoji inside the text, must input the alias of the emoji between colon:
:smile: Successfull job! :100: Display as:
😄 Successfull job! 💯
A full list of supported emoji are listed here: vdurmont/emoji-java