What needs to be done to a module to make it 2.3 compatible?

Starting out on developing modules and such and would like the module to be compatible across the board... with 2.0.18, 2.2 and 2.3...

there is information online in the wiki for 2.0 and 2.2 but not anything for 2.3 yet.

Quote:Normally nothing!
The core should provide a stable and compatible API.

While ghia is technically correct - there are several functions in the core which have been deprecated in the 2.3 core indicating that they will, at some future point, be removed. Unfortunately these aren't easily found in one documented location (yet). You can find a relatively recent copy of the 2.3 API athttp://dev.xoofoo.org/.

I'd recommend you write your module to be compatible with the latest core and then test it under previous versions. I'd make the same recommendation for PHP & MySQL.