typescript-eslint consistent-type-definitions

consistent-type-definitions is a rule enforced by @typescript-eslint/stylistic which checks that you use type or interface consistently in your TypeScript type definitions.

The default is that it will enforce all shape types to be interfaces.

To change the preferred keyword or level, configure like:

import { defineConfig } from "eslint/config";
import tseslint from "typescript-eslint";

const eslintConfig = defineConfig([
  tseslint.configs.stylistic,
  {
    rules: {
      "@typescript-eslint/consistent-type-definitions": [
        "error", // error | warn | off
        "type",  // type | interface
      ],
    },
  },
]);

export default eslintConfig;

See typescript-eslint documentation