This modular Python-based pipeline provides tools for computing background cosmological quantities and Fourier-space power spectra for multiple tracers of large-scale structure, such as galaxies and 21cm intensity maps. It is designed for multitracer Fisher forecasting in both the linear regime and nonlinear scales using HALOFIT. This version reflects a cleaned folder structure, updated filenames, and improved modularity. It supports forecasting of parameters such as f_NL, fσ8, and bias terms.