I started with this shortcut for Things and adapted it for OmniFocus:
I also improved the shortcut so that it appends the links to the OmniFocus tasks to the end of the note. (It requires plain text instead of rich text now).
Here is the link:
I’d love to change the links behavior and would place them right in the line where the todo was before.
Unfortunately it seems that Agenda doesn’t support replacing a note with a new content. Only appending or creating a new one.
Maybe this can be added in a future release, @mekentosj ?