node/tools/eslint/conf/config-schema.json

{
    "type": "object",
    "properties": {
        "root": { "type": "boolean" },
        "globals": { "type": ["object"] },
        "parser": { "type": ["string", "null"] },
        "env": { "type": "object" },
        "plugins": { "type": ["array"] },
        "settings": { "type": "object" },
        "extends": { "type": ["string", "array"] },
        "rules": { "type": "object" },
        "parserOptions": { "type": "object" }
    },
    "additionalProperties": false
}