LF Jump-Attack-Skill for High-Five

Hello everyone. I have a question for the brilliant, professional Java coders and client developers.

I would really like to implement the "jump attack" skill from more recent chronicles into my High Five server.

Now, a question for the brilliant, clever minds among you.

Is it even possible to implement the jump-attack skill mechanic and functionality from current, modern source code into an older High Five source code?

Or would it be easier to draw upon source code—from Helios, for example, where the jump skill is already functional—and implement new transformations that incorporate this exact jump-skill functionality?

I would greatly appreciate helpful feedback and practical, goal-oriented suggestions for solutions.

Thank you very much for your time.