Quote:
For any class you can type allskills classname. example allskills cleric
This will list all spells/skills that classtype can get. You can then type prereq skillname and you can see what you need to get it.
The reason this is the way to go is because coding the other system would be difficult, messy, and the results would be messy to understand since there are multiple ways to achieve many skills. Thus we generally just go with the system described by Ezzence. At soem point though I will improve the output a bit to show what classes can get it when you type prereqs.