Add an excerpt for each link – in other words, grab the first 200 characters of each tiddler and show it under the title. This will help us remind us what the tiddler is about, if the title wasn't chosen carefully enough.

We can accomplish this by wikifying the tiddler – that is, processing the HTML, transclusions, and wikitext in it as if we were displaying the tiddler – and then taking just the beginning portion of it. Here's a partially completed procedure you can use to get an excerpt from a tiddler. Your task is to figure out what goes in the filtered transclusions (to get the wikitext of the tiddler and convert the rendered wikitext to just its first 200 characters), then call the procedure from an appropriate location.

\procedure excerptify(title)
  <$wikify name="contents" text={{{ ... }}}>
    <$text text={{{ ... }}} />...
  </$wikify>
\end

Hint: The split[] filter operator with nothing in the square brackets can be used to split incoming text into individual characters. You may need to review the filter operators documentation.