postgres-mcp/eslint.config.js at main · element-softworks/postgres-mcp · GitHub

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

export default tseslint.config(
  {
    ignores: [
      "dist",
      "node_modules",
      "src/**/*.test.ts",
      "src/**/*.spec.ts",
      "src/**/*.bench.ts",
    ],
  },
  {
    extends: [
      js.configs.recommended,
      ...tseslint.configs.strictTypeChecked,
      ...tseslint.configs.stylisticTypeChecked,
    ],
    files: ["src/**/*.ts"],
    languageOptions: {
      ecmaVersion: 2022,
      globals: { ...globals.node },
      parserOptions: {
        projectService: true,
        tsconfigRootDir: import.meta.dirname,
      },
    },
    rules: {
      "@typescript-eslint/no-explicit-any": "error",
      "@typescript-eslint/explicit-function-return-type": [
        "error",
        {
          allowExpressions: true,
          allowTypedFunctionExpressions: true,
          allowHigherOrderFunctions: true,
        },
      ],
      "@typescript-eslint/no-unused-vars": [
        "error",
        { argsIgnorePattern: "^_", varsIgnorePattern: "^_" },
      ],
      "@typescript-eslint/no-non-null-assertion": "error",
      "@typescript-eslint/strict-boolean-expressions": [
        "error",
        {
          allowNullableBoolean: true,
          allowNullableString: true,
          allowNullableObject: true,
        },
      ],
      "@typescript-eslint/no-floating-promises": "error",
      "@typescript-eslint/await-thenable": "error",
      "@typescript-eslint/require-await": "error",
      "@typescript-eslint/no-unnecessary-condition": "off",
      "@typescript-eslint/no-unsafe-assignment": "error",
      "@typescript-eslint/no-unsafe-member-access": "error",
      "@typescript-eslint/no-unsafe-call": "error",
      "@typescript-eslint/no-unsafe-return": "error",
      "@typescript-eslint/no-unsafe-argument": "error",
      "@typescript-eslint/consistent-type-imports": [
        "error",
        {
          prefer: "type-imports",
          fixStyle: "inline-type-imports",
        },
      ],
      "@typescript-eslint/consistent-type-exports": "error",
      // Prevent console.log() which writes to stdout and corrupts MCP stdio transport
      // Only stderr output (error, warn) is safe for MCP servers
      "no-console": ["error", { allow: ["error", "warn"] }],
    },
  },
  // http.ts intentionally uses deprecated SSEServerTransport for backward
  // compatibility with legacy MCP SSE clients (protocol 2024-11-05).
  {
    files: ["src/transports/http.ts"],
    rules: {
      "@typescript-eslint/no-deprecated": "off",
    },
  },
  // Test files configuration - use simpler parsing without projectService
  {
    files: ["src/**/*.test.ts", "src/**/*.spec.ts"],
    languageOptions: {
      ecmaVersion: 2022,
      globals: { ...globals.node },
      parserOptions: {
        project: null, // Disable project service for test files
      },
    },
    rules: {
      // Relax some rules for tests
      "@typescript-eslint/no-explicit-any": "off",
      "@typescript-eslint/no-unsafe-assignment": "off",
      "@typescript-eslint/no-unsafe-member-access": "off",
      "@typescript-eslint/no-unsafe-call": "off",
      "@typescript-eslint/no-unsafe-argument": "off",
    },
  },
);