This small tool checks for two cases of duplication so far:
- a rule's property has been defined before in the same media set
 - a rule's property duplicates the value of the media query less rule
 
Run ilcd folder or skip the folder and link the cwd recursively. The node_modules are ignored as file origin.
Add a .idrinth-duplicate-style-check.json configuration file in the cwd to define entry points to get better results, example:
{
  "entrypoints": [
    "index.css",
    "src/hidden.css"
  ]
}And yes, this can be run with npx as well: npx @idrinth/duplicate-style-check