Numenera questions.
 

Some of the descriptors include explicit skills. For example, "Rugged" includes climbing, jumping, running and swimming. I can easily bootstrap each of those skills as individual, advanceable skills.

Then there are descriptors that include skills that are more broad and vague. "Strong" includes "You're trained in all actions involving breaking inanimate objects." Then "strong-willed" includes "You're trained in tasks requiring incredible focus or concentration."

I have three questions about this:
1) When a specific skill is bootstrapped, should it be advanceable?
2) Should the advance apply to each individual skill, or should it apply to all the skills defined in the same set?
3) Should the vague/broad skills be advanceable?

If I recall, you don't really advance skills in Numenera to begin with. Also for the "broad" skills as you call them, I would kinda call them like a class special and have it show up on the specials tab.

You do, though. Skills have three levels. Untrained, Trained and Specialized.
When you advance, you can advance three different categories. Once you advance in each category, you gain a tier.

One of the categories you can advance is skills.

OK ... except for mutants and non-humans, I have all the descriptors mostly doing their things now. I'll probably do some refinement as things progress, and I start defining equipment, cyphers, oddities and artififacts.

Maybe I'm wrong but the advancement shouldn't be 4?
How are you handling the Inability thing?