\NeedsTeXFormat{LaTeX2e}
\ProvidesPackage{mkessler-counters}[2021-09-06 - Write counters to auxiliary file]

\RequirePackage{etoolbox}

\newwrite\mkessler@counters@out
\immediate\openout\mkessler@counters@out\jobname.cnt\relax
\AtBeginDocument{
    \let\mkessler@counters@saved@stepcounter\stepcounter
    \def\stepcounter#1{
    \mkessler@counters@saved@stepcounter{#1}
    \immediate\write\mkessler@counters@out{#1: \csname the#1\endcsname}}
}