Sadly it's too late to include Xth Sense to Pd-ext, I already ask for the inclusion of PdMtl and Mtl Abstraction in the next Pd-ext (0.43).
Quoting Hans " ... I think its too late for 0.43, but 0.44 is definitely possible. With much less work, we can make it easy for people to find and install themselves, and that takes effect once you do it. Only one small thing has been added since November, so its in feature freeze.
make release tarballs, for example, you can just tag a release in git, ie "git tag v0.1", then github makes a link to a downloadable tarball.
people to find
~/Library/Pd, etc.
These are all steps that need to be done to get it into Pd-extended also, so it would not be wasted effort. ... "