Make google actions development project preview persist longer

Question

I want to make google voice actions app for my Google Home. But, based on quick research, as of Dec 11, google does not allow private projects for Google Home.

References:

• Can I develop a private action only accessible via my google home or linked account?
• How can I run my development action on my Google Home?

I understand that I can preview the app from API.ai project, and it deployes to the linked Google Home device.

But the issue is, the deployed app does not persist. It is no longer available after hour or so. How can I make it permanent (if there is a way)?

UPDATE

Based on Leon's answer, I just wanted to extend the steps on how to enable the sample for 24 hours.

1. Click on the "Google Home Web Simulator" link on bottom right corner.
2. Then you will be presented with google home device - click on "Start" button on that page
3. On next page, top right corner you have the "ACTION PACKAGE" button Leon is talking about. Click on that and extend expiration time by clicking on "Preview for 24 hours" button. See screenshot below:

Answer 1

You can extend the time the development action can be previewed on the web simulator or Google Home device. After you preview the action from API.AI, click on the list of action packages in the web simulator. Then select the "Preview for 24 hours" link for your action package.