N0VI028/JS-Slash-Runner — reverse-engineered prompt

I want a SillyTavern extension that lets me run external JavaScript from inside the chat app, even in places where SillyTavern normally would not allow it. The main thing is that the code should run in an isolated iframe so it is separated from the main app as much as possible, and the UI should make it really clear that running custom scripts is risky.

Please make it feel like a normal Tavern helper plugin, with a simple way to load or trigger scripts, and clear warnings about untrusted code being able to read data, change settings, or send requests. If there are safer defaults or permission limits you can add without changing the basic idea, do that.

I also want it set up so it can be built and dropped into a SillyTavern third party extension folder, and still be buildable from outside that folder if needed. Keep the existing localized text and plugin manifest flow in mind. If anything is unclear, check the project docs online and wire it up the way SillyTavern extensions usually work.