This extension lets you add code snippets right from the launcher. You probably have been in a situation where you need a snippet outside of your IDE or some way to have parameters in the snippet.
You can add a snippet by selecting the inital option
To edit a snippet you can type e or edit as the first word and then the snippet keyword. It will show a popup like the add one.
Basically: e {keyword} or edit {keyword}
To edit a snippet you can type d or delete as the first word and then the snippet keyword.
Basically: d {keyword} or delete {keyword}