modify-babel-preset

Utility to create a modified Babel preset by cloning an existing preset and applying plugin additions, removals, or configuration overrides. Current version 3.2.1. Helps avoid manual preset duplication by flattening nested presets into a single plugin list and applying transformations. Key differentiator: plugin filtering works on resolved filenames for precise matching. Works best with npm 3. Release cadence: sporadic, last release 2017.