eslint.config.js

import eslint from "@eslint/js";
import tseslint from "typescript-eslint";

export default tseslint.config(
  eslint.configs.recommended,
  ...tseslint.configs.strictTypeChecked,
  {
    ignores: ["dist/", "node_modules/"],
  },
  // Source files - strict rules with type checking
  {
    files: ["src/**/*.ts"],
    languageOptions: {
      parserOptions: {
        projectService: true,
        tsconfigRootDir: import.meta.dirname,
      },
    },
    rules: {
      eqeqeq: "error",
      "@typescript-eslint/no-unused-vars": ["error", { argsIgnorePattern: "^_" }],
      "@typescript-eslint/no-explicit-any": "error",
      "@typescript-eslint/consistent-type-imports": "error",
      "@typescript-eslint/no-floating-promises": "error",
      "@typescript-eslint/explicit-function-return-type": [
        "error",
        {
          allowExpressions: true,
          allowTypedFunctionExpressions: true,
          allowHigherOrderFunctions: true,
        },
      ],
      // Allow numbers in template literals (common in CLI output)
      "@typescript-eslint/restrict-template-expressions": ["error", { allowNumber: true }],
      // Allow void returns in arrow shorthands (event handlers)
      "@typescript-eslint/no-confusing-void-expression": ["error", { ignoreArrowShorthand: true }],
      // Non-null assertions are used after validation guards
      "@typescript-eslint/no-non-null-assertion": "warn",
    },
  },
  // Test files - relaxed rules without type checking
  {
    files: ["tests/**/*.ts"],
    ...tseslint.configs.disableTypeChecked,
    rules: {
      ...tseslint.configs.disableTypeChecked.rules,
      "@typescript-eslint/no-unused-vars": ["error", { argsIgnorePattern: "^_" }],
      "@typescript-eslint/consistent-type-imports": ["error", { disallowTypeAnnotations: false }],
      "@typescript-eslint/no-non-null-assertion": "off",
      "@typescript-eslint/no-dynamic-delete": "off",
    },
  }
);