[BUG] allow-git=root does not allow root level git dependencies to be installed

[akhenry]

Is there an existing issue for this?

• I have searched the existing issues

This issue exists in the latest npm version

• I am using the latest npm

Current Behavior

The allow-git=root option refuses to install root-level git dependencies.

Expected Behavior

allow-git=root should install root-level git dependencies but refuse to install transitive git dependencies, per the documentation:

root only allows git dependencies defined in your project's package.json to be fetched installed.

Steps To Reproduce

1. Create a simple package.json with a root dependency on a git project

cat > package.json.text <<- EOF
{
  "dependencies": {
    "left-pad": "github:left-pad/left-pad"
  }
}
EOF

2. Attempt to install with --allow-git=root

npm install --allow-git=root

3. Observe the following error:

$ npm install --allow-git=root
npm error code EALLOWGIT
npm error Fetching non-root packages of type "git" have been disabled
npm error Refusing to fetch "left-pad@github:left-pad/left-pad"
npm error A complete log of this run can be found in: 

Environment

• npm: 11.12.1
• Node.js: v25.9.0
• OS Name: Mac OS 15.7.4 (24G517)
• System Model Name: