\input regression-test.tex
\documentclass{article}
\newcommand\task{original task command}
\let\originaltask\task
\newcommand\kbtask{original kbtask command}
\let\originalkbtask\kbtask
\newcommand\kbset{original kbset command}
\let\originalkbset\kbset
\newcommand\kbdefinepalette{original palette command}
\let\originalkbdefinepalette\kbdefinepalette
\usepackage{kanban-board}
\begin{document}
\sbox0{\scriptsize $x$}% Load math font sizes outside captured output.
\START
\ifx\task\originaltask
  \TYPE{KANBAN TASK CONFLICT PRESERVED OK}
\else
  \TYPE{KANBAN TASK CONFLICT PRESERVED FAILED}
\fi
\ifx\kbtask\originalkbtask
  \TYPE{KANBAN KBTASK CONFLICT PRESERVED OK}
\else
  \TYPE{KANBAN KBTASK CONFLICT PRESERVED FAILED}
\fi
\ifx\kbset\originalkbset
  \TYPE{KANBAN KBSET CONFLICT PRESERVED OK}
\else
  \TYPE{KANBAN KBSET CONFLICT PRESERVED FAILED}
\fi
\ifx\kbdefinepalette\originalkbdefinepalette
  \TYPE{KANBAN PALETTE ALIAS CONFLICT PRESERVED OK}
\else
  \TYPE{KANBAN PALETTE ALIAS CONFLICT PRESERVED FAILED}
\fi
\kanbandefinepalette{conflict-test}{red,blue}
\kanbansetup{palette=conflict-test,mode=dark}
\makeatletter
\ifdefstring{\kanban@mode}{dark}
  {\TYPE{KANBAN CANONICAL COMMANDS AFTER CONFLICT OK}}
  {\TYPE{KANBAN CANONICAL COMMANDS AFTER CONFLICT FAILED}}
\makeatother
\begin{kanban}[columns={Todo}]
  \kanbantask{Todo}{The package command remains available}
\end{kanban}
\TYPE{KANBAN CONFLICT BOARD OK}
\END
\end{document}