ions <code>Enter|Exit-BuildTask</code> and
<code>Enter|Exit-BuildJob</code>.</p>
<p>Why? Some advanced task scripts need this instance (e.g. shared between tasks).
A common variable <code>$Task</code> seems to be simpler than use of a parameter in each
of 8 above code pieces. Let's keep parameters available for something else.</p>
<p><strong>Potentially incompatible</strong></p>
<p>Build scripts with the parameter <code>$Task</code> or script variable <code>$Task</code> may fail.
Rename this variable. The p