eslint.config.js

import tseslint from "@typescript-eslint/eslint-plugin";
import tsparser from "@typescript-eslint/parser";
import prettier from "eslint-config-prettier";

export default [
  {
    ignores: ["node_modules/**", "dist/**", "*.js", "scripts/**"],
  },
  {
    files: ["src/**/*.ts"],
    languageOptions: {
      parser: tsparser,
      parserOptions: {
        project: "./tsconfig.json",
        ecmaVersion: 2022,
        sourceType: "module",
      },
    },
    plugins: {
      "@typescript-eslint": tseslint,
    },
    rules: {
      // TypeScript strict rules
      "@typescript-eslint/no-explicit-any": "error",
      "@typescript-eslint/explicit-function-return-type": [
        "error",
        {
          allowExpressions: true,
          allowTypedFunctionExpressions: true,
        },
      ],
      "@typescript-eslint/explicit-module-boundary-types": "error",
      "@typescript-eslint/no-unused-vars": [
        "error",
        {
          argsIgnorePattern: "^_",
          varsIgnorePattern: "^_",
        },
      ],
      "@typescript-eslint/no-floating-promises": "error",
      "@typescript-eslint/await-thenable": "error",
      "@typescript-eslint/no-misused-promises": "error",

      // Code quality
      "@typescript-eslint/naming-convention": [
        "error",
        {
          selector: "variable",
          format: ["camelCase", "UPPER_CASE", "PascalCase"],
        },
        {
          selector: "function",
          format: ["camelCase", "PascalCase"],
        },
        {
          selector: "typeLike",
          format: ["PascalCase"],
        },
      ],
      "@typescript-eslint/no-unnecessary-condition": "warn",
      "@typescript-eslint/prefer-nullish-coalescing": "warn",
      "@typescript-eslint/prefer-optional-chain": "warn",

      // Best practices
      "no-console": ["warn", { allow: ["error", "warn"] }],
      "prefer-const": "error",
      "no-var": "error",
      eqeqeq: ["error", "always"],
      curly: ["error", "all"],
      "no-throw-literal": "error",
    },
  },
  prettier,
];