\input regression-test.tex
\documentclass{article}
\usepackage[colors-only]{osgstyler}

\begin{document}
\START
\ExplSyntaxOn
\cs_if_exist:NTF \fontspec
  { \TYPE{fontspec-loaded=true} }
  { \TYPE{fontspec-loaded=false} }
\ExplSyntaxOff
\OsgFontPaletteAvailableTF
  { \TYPE{font-available=true} }
  { \TYPE{font-available=false} }
\extractcolorspec{osgstyler-primary}\TestColor
\TYPE{primary=\TestColor}
\TYPE{active-metric-spacing-md=\OsgMetric{spacing}{md}}
\DeclareOsgDecoration{colors-only-test}{line={color=accent}}
\OsgDecorationIfHasComponentTF{colors-only-test}{line}
  { \TYPE{decoration-component=true} }
  { \TYPE{decoration-component=false} }
\TYPE{modes=done}
\END
\end{document}