First enable the Dialogflow API for each project: https://console.developers.google.com/apis/api/dialogflow.googleapis.com/overview?project=YOURPROJECT

Make sure you have a serviceAccount.json with Dialogflow API Admin access to your projects.

Usage:

./dftool.js export my-dev-project

This creates a dialogflow directory with an export of the intents and config from my-dev-project. It strips out googleAssistant.project and webhook.url since they are project dependent. You can commit this dialogflow directory to Git.

./dftool.js import my-prod-project https://us-central1-my-prod-project.cloudfunctions.net/fulfillment

This takes the dialogflow directory, sets proper values for googleAssistant.project and webhook.url and imports it to my-prod-project.

Note that this project still uses Node 6 since you also need that for Google Cloud Functions.