Yarn or NPM?

[wilbertcaba]

I had some good days without working on a project using wpkit. Looked into the package.json file and some of the scripts are written using npm:

...
"test": "npm run lint",
"lint": "npm run lint:js && npm run lint:css",
...

I started installing packages running npm install package-name and ran into conflicts so I looked into the file browser and found a yarn.lock file. I used yarn add package-name to install packages successfully.

Could that be conflicting having npm commands while using yarn? Maybe somewhat misleading?