website: add more info for runner mode

website/content/docs/features/runner-mode.md

@@ -15,3 +15,7 @@ In some cases, someone might want to switch to just shell script to avoid
 it while interactive but still have a Lua config, or go full Lua to use
 Hilbish as a REPL. This also allows users to add alternative languages,
 instead of either like Fennel.
+
+Runner mode can also be used to handle specific kinds of input before
+evaluating like normal, which is how [Link.hsh](https://github.com/TorchedSammy/Link.hsh)
+handles links.