mbruhn

Using the osx call below will generate a journal entry in Dayone based on completed tasks from Pagico
  
I assume that you have both Pagico and Dayone running. Besides that you need to install Install client tool for 
DayOne (download from http://dayoneapp.com/downloads/dayone-cli.pkg) you may need the manual also - get it from
here http://dayoneapp.com/tools/cli-man/.

Once installed open the terminal and execute the line below:
$ /Applications/Pagico/Pagico.app/Contents/Resources/Pagico/external/tasks.mac.sh advanced=1 title="Completed in Pagico ($(date +"%d/%m-%y"))" from=today status=1 showDueDate=d/m-y | dayone new

You can schedule this or consider using Alfred3 to automate the process.