This is a feature! turbo run dev is meant to run dev in all your workspaces that have that script.

You have some options though:

1. You can setup your package-one/package.json to have the dev script call the dev:mode1 (and similarly in package-two) like so:

   {
     // ...snipped...
     "scripts": {
       "dev": "npm run dev:mode1"
     }
   }

2. You can setup your turbo.json with some clever dependsOn:

   {
     "pipeline": {
       "dev": {
         "dependsOn": ["dev:mode1", "dev:modes"]
       }
     }
   }

   If package-one only implements dev:mode1 and package-two only implements dev:mode2 (and neither implement dev), then you should get the behavior you're looking for.

   (Note: I wouldn't really recommend this approach as it feels a bit brittle, but it might work for you.)