Is there a ninth fold to the Eightfold path or is it just eight? For the longest time, I never had much to question about it but I've taken to wondering about an extra one, one that wasn't there before. I get to feeling that "right spirit" should be another fold. Can Buddha's spirit be tested for this?
There is the:


8 Fold Path is the practice up to Sotapanna, and
10 Fold Path for full enlightenment


The Noble 8 Fold Path is the practice up to Sotapanna.



Source: Maha Cattarīsaka Sutta intorduction

To go beyond Sotapanna one must add 2 more elements under liberation/release which are:


right knowledge
right freedom




Maha Cattarīsaka Sutta