The design goal of HARP is to provide a toolkit for building spectroscopic data reduction pipelines. HARP is currently transitioning from a "Research and Development" platform to a production framework. It contains serial and MPI tools for exploring maximum likelihood spectral extraction techniques that can run on high performance computing systems. HARP has a modular framework for defining instrumental parameters and for reading image and spectral data formats. The codebase is under active development, so the best source of current information is the github repository and associated documentation and issue tracker.