\input regression-test.tex
\documentclass{article}
\usepackage[startdate=18.07.2026]{kanban-board}
\begin{document}
\sbox0{\scriptsize $x$}% Load math font sizes outside captured output.
\START
\begingroup
  \makeatletter
  \setlength\linewidth{120pt}
  \setbox2=\vbox{\hsize=120pt
    \kanban@rendercard{kanbanBlue}{Measured card}{}{}{}{}{}{}}
  \ifdim\wd2=120pt
    \TYPE{KANBAN FULL-WIDTH CARD OK}
  \else
    \TYPE{KANBAN FULL-WIDTH CARD FAILED}
  \fi
  \def\kanban@boardgroup{layout-header-test}
  \csgdef{tcb@ehg@height@KBH@layout-header-test}{80pt}
  \setlength\linewidth{90pt}
  \setbox2=\vbox{\hsize=90pt
    \begin{kanban@header}{kanbanSlate}{white}Short\end{kanban@header}}
  \setbox4=\vbox{\hsize=90pt
    \begin{kanban@header}{kanbanBlue}{white}%
      A deliberately wrapping heading
    \end{kanban@header}}
  \dimen0=\dimexpr\ht2+\dp2\relax
  \dimen2=\dimexpr\ht4+\dp4\relax
  \ifdim\dimen0=\dimen2
    \TYPE{KANBAN BREAK HEADERS SYNCHRONIZED OK}
  \else
    \TYPE{KANBAN BREAK HEADERS SYNCHRONIZED FAILED}
  \fi
  \makeatother
\endgroup
\begin{kanban}[
    columns={A deliberately long heading,Short,Empty},
    mode=dark,columnsep=1mm]
  \kanbantask[prio=high,author=Alice,deadline=01.01.2000]
    {A deliberately long heading}{A full-width card}
  \kanbantask[due=Milestone]{Short}{A descriptive deadline label}
\end{kanban}
\begin{kanban}[columns={Backlog,Done},break,columnsep=2mm]
  \kanbantask[due=Editorial review.]{Backlog}{A punctuated label}
  \kanbantask[completed]{Done}{A completed task}
\end{kanban}
\TYPE{KANBAN FIXED AND BREAK LAYOUTS OK}
\END
\end{document}