Trouble with extension I added to the custom node list

[Malkalypse]

I tried adding an extension to custom-node-list.json but it's not showing up in the Custom Nodes Manager in ComfyUI. For reference, this is what I added:

{
	"author": "Malkalypse",
	"title": "ComfyUI-MouseCoords",
	"id": "mousecoords",
	"reference": "https://github.com/Malkalypse/ComfyUI-MouseCoords",
	"files": [
		"https://github.com/Malkalypse/ComfyUI-MouseCoords"
	],
	"install_type": "git-clone",
	"description": "Display real-time mouse coordinates in graph space. Shows the current mouse position in the top-right corner of the canvas, useful for positioning nodes precisely, debugging layouts, and measuring distances."
}

Can anyone tell me what's wrong, and how I can fix it?