I want to create a new module (search module for the website builder). Do I use Launchpad for this or Github? I read that odoo is on github now, but I notice launchpad being used still.

What is the best practise?

And as an extra question on this. How do I know if somebody is already working on this type of module or not. I like to do the work, but not if in the end I notice somebody did the same as me already.

Thanks a lot