  While numerical simulations offer unparalleled precision and robustness in
studying complex physical systems, their execution is often hindered by
complexity, costliness, and time consumption due to the intricate equations
involved. This challenge is already encountered in General Relativity, where
non-flat spacetimes exacerbate the computational burden. This complexity is
further intensified when dealing with additional degrees of freedom. To address
this challenge head-on, we introduce GRBoondi, a groundbreaking
fixed-background numerical relativity code designed to provide a unified
interface for numerically solving Generalized Proca theories. GRBoondi grants
users the ability to make arbitrary modifications to the Proca equations of
motion on any background, providing a robust and versatile tool for exploring
diverse classes of Generalized Proca theories. This letter serves as part of
the submission of GRBoondi to the Journal of Open Source Software. For access
to the code, please visit https://github.com/ShaunFell/GRBoondi.git.
