The Nancy Grace Roman Space Telescope will measure weak gravitational lensing and galaxy clustering to study dark energy and cosmic acceleration. Accurate redshifts for millions of galaxies are required and will come from slitless spectroscopy. But slitless spectra across the field face overlapping spectra, contamination from nearby sources, and galaxy

A large Wide-Field Science program will develop a next-generation crowded-field stellar photometry tool for Roman. It will support native Roman data formats and pipeline, enabling seamless interoperation with the Roman Research Nexus. Studies of resolved stellar populations are crucial to all four of the community-defined Roman surveys. Roman will encounter