Mixpanel provides these templates for tracking plans:
Copy the template you want to your own Google Drive account, or download them locally. Then enter the appropriate information, such as goals, questions, events, properties and people properties.
When finalized, share your tracking plan with the developer(s) who will be implementing Mixpanel in your application or website.
If you’re using one of the templates above, we’ve already included links to our developer documentation, which should make implementation seamless.
Related topic: How do I create a tracking plan?