Environment

Node version: v16.14.0
npm version: v8.3.1
Local ESLint version: v8.23.1 (Currently used)
Global ESLint version: Not found
Operating System: win32 10.0.19044

What parser are you using?

Default (Espree)

What did you do?

const { FlatESLint } = require("eslint/use-at-your-own-risk");
const path = require("path");

const eslint = new FlatESLint({
    overrideConfigFile: true, // just to skip loading eslint.config.js
    baseConfig: {
        rules: {
            "id-denylist": ["error", "foo"]
        }
    }
});

(async () => {
    const result = (await eslint.lintText("let foo;", { filePath: path.join(process.cwd(), "a.js") }))[0];

    console.log(result.messages);
})();

What did you expect to happen?

To log a lint message for id-denylist.

What actually happened?

Logs []

Participation

• I am willing to submit a pull request for this issue.

Additional comments

FlatESLint accepts baseConfig option, but does nothing with it.