I have the following sentence:
Successfully ran the "user.js" seed.
Is that "the" necessary?
When is it necessary and when is it not?
I have the following sentence:
Successfully ran the "user.js" seed.
Is that "the" necessary?
When is it necessary and when is it not?
In your example, the definite article is needed because you are being specific.
I successfully ran the "user.js" seed.
You ran a seed. Which seed? The "user.js" seed. If you can ask "which..." then there must be more than one and you need to be more specific, using the definite article.
If the article you are referring to has a unique name then there is no need for the definite article. Sticking with your computing scenario, consider this example:
Open Device Manager.
"Device Manager" is a proper noun for an extension of the Microsoft Management Console. There is only one Device Manager on your computer, so there is no need for the definite article. Nobody can rightly ask "which device manager?"
However, if you said:
Open the Device Manager console window.
Here, the definite article is required, because you are referring to its console window, and there are lots of console windows.
Open the console window. Which console window? The Device Manager console window.