[Inkscape-devel] Extensions, python, etc

I want to add Python support to Inkscape.

From what I read, this should be a script extension. However,

extensions don't seem to show up for me. Are they disabled? Do I need to do something special? Am I looking in the wrong place?

My theory was to implement a svgdom interface (+ maybesome extensions to support inkscape's stars and the like) to the sprepr, so python extensions can be used in any program which supports svgdom. Is this reasonable? Should there be a C++ DOM interface, which I just wrap in Python, or can I just get the sprepr into Python and then use pure Python to wrap it in DOM (easier for me, probably)?