in other words, instead of creating an extension, you'd have to create something like this:
readme
home.url the url of the project page
src.url the actual url of the source package
makeinstall.sh a wrapper script for make install
makescript.sh a wrapper script for make
configurescript.sh a wrapper script for configure
home.url and src.url could be multiline, but these would be as simple as any other tc system, they could be one url per line without other information, like a dep list.
you could call it ".tcs" it wouldn't require changing the getting started page, because it wouldn't be a "mode" for running tc, to make tc compile its extensions on each boot. it would simply be a third type of extension for people that want to create source based packages. it could become as popular as tce and tcz, but i believe it will play a supporting role.
sourcemage is a very cool distro. i've never used it but i like the idea. i tried to compile moc today. as usual it checked a lot of things, it got to configure or make and started telling me why it wasn't going to compile. .tcs files could be collected and used to create documentation and howtos for compiling like experts. it would be a feature that is still very rare in distros, very faithful to the idea of gnu and linux, and possibly help to give tc an even larger place in the world of distributions. but the first thing tc should be is simple. i'm hoping this is a very simple way to do what sourcemage does in tc.