Use the keword "c" (for "calculate") to start writing SoulverCore expressions.
SoulverCore (https://github.com/soulverteam/SoulverCore) from Soulver (https://soulver.app). SoulverCore icon from Matthew Skiles (https://matthewskiles.com/).
Build with the regular Xcode 12 workflow. An "Archive" build will include the SoulverCore.workflow file you can use to add the workflow to Alfred.