Create new add-on InvoicePlane 2

Hi.

I would like to know if there is any documentation to know the correct way to create add-ons.

I would like to be able to create add-ons that add options to the program, as does the complete Time Tracking.

Thank you.

There is no other documentation other than in the wiki. If there are no further information about addons you would have to check how the time tracking plugin is working.

I would love to see how the time tracking complement works. But it is not possible, since the alpha version of inoviceplane 2 is not included.

Can someone provide it?