I spend a lot of time building Kirby sites—and other projects—locally with PHP’s built-in server, and I wanted a way to dump variables without messing up the browser response. So I made a tiny helper called cl(), powered by Symfony VarDumper, that sends dumps straight to the terminal (stdout) instead of the page. It’s not a Kirby plugin and not tied to Kirby in any way—you can drop it into any PHP project—but I use it heavily during local Kirby CMS development. Think of it as a quick, minimalistic “dump-to-console and continue,” not a full-blown debugger replacement.
I like it because it keeps browser output clean, gives me colorful and structured dumps, and doesn’t block execution. Just call cl($whatever) and keep going.
Install (dev-only):
composer require lemmon/cl --dev
Use anywhere after Composer autoload:
cl($page);
cl($kirby->request());
cl($someDeepArray);
Repo: lemmon/cl
Cheers! 
Feedback welcome.