if you mean am I the only working on Eluna. I have lately been doing most of the edits to Eluna.
Though with the documentation now, foe and tommy have also helped. Salja works mostly with mangos side of Eluna, while I work with TC.
Patman has also now helped us by creating the documentation generator and some changes and fixes in the source.
Anyone can basically create pull requests, but we have not had others than patman I think in years. Despite being opensource.
So no
If you meant do I only work on eluna atm, I have many things going on around. I am working with people, I have a job, soon studying and in real life there are many things going down.
So no
If you meant do I only work with eluna, meaning I only use eluna to code or something. I have a lot of codes around being done in C++, lua, java etc
So no
Pretty vague question xd