Standardized lint rules

Author: jzongker

.prettierrc.json

@@ -3,84 +3,84 @@ import globals from "globals";
 import reactHooks from "eslint-plugin-react-hooks";
 import reactRefresh from "eslint-plugin-react-refresh";
 import tseslint from "typescript-eslint";
-import prettier from "eslint-config-prettier";
-import { globalIgnores } from "eslint/config";
+import unusedImports from "eslint-plugin-unused-imports";
 
 export default tseslint.config([
-  globalIgnores(["dist"]),
+  { ignores: ["node_modules/", "dist/", "build/", ".next/", "coverage/", "*.config.js"] },
   {
-    files: ["**/*.{ts,tsx}"],
-    ignores: ["build", "node_modules", ".github", ".vscode"],
+    files: ["**/*.{ts,tsx,js,jsx}"],
     extends: [js.configs.recommended, tseslint.configs.recommended, reactHooks.configs["recommended-latest"], reactRefresh.configs.vite],
     languageOptions: {
       ecmaVersion: 2020,
       globals: globals.browser,
     },
+    plugins: {
+      "unused-imports": unusedImports,
+    },
     rules: {
+      // --- Code quality ---
+      "prefer-const": "error",
       "@typescript-eslint/no-explicit-any": "off",
-      "@typescript-eslint/consistent-type-imports": "off",
+      "@typescript-eslint/no-unused-vars": ["warn", {
+        args: "all",
+        argsIgnorePattern: "^_",
+        varsIgnorePattern: "^_"
+      }],
+      "unused-imports/no-unused-imports": "error",
       "no-case-declarations": "off",
       "no-constant-binary-expression": "off",
 
-      // Compact if statements and blocks
-      curly: ["error", "multi-line"],
+      // --- Formatting (ESLint is the sole formatter — no Prettier) ---
+      "no-trailing-spaces": "error",
+      "eol-last": ["error", "always"],
+      "quotes": ["error", "double", { avoidEscape: true, allowTemplateLiterals: true }],
+      "semi": ["error", "always"],
+      "comma-dangle": ["error", "never"],
+      "indent": ["warn", 2, { SwitchCase: 1 }],
+      "comma-spacing": ["error", { before: false, after: true }],
+      "key-spacing": ["error", { beforeColon: false, afterColon: true, mode: "strict" }],
+      "keyword-spacing": ["error", { before: true, after: true }],
+      "space-infix-ops": "error",
+      "no-multi-spaces": ["error", { ignoreEOLComments: true }],
+      "block-spacing": ["error", "always"],
+
+      // --- Compact / single-line formatting ---
       "brace-style": ["error", "1tbs", { allowSingleLine: true }],
+      curly: ["error", "multi-line"],
       "nonblock-statement-body-position": ["error", "beside"],
 
-      // Object and array formatting - prefer compact single-line objects
+      // Objects
       "object-curly-spacing": ["error", "always"],
-      "object-curly-newline": [
-        "error",
-        {
-          ObjectExpression: { multiline: true, minProperties: 6, consistent: true },
-          ObjectPattern: { multiline: true, minProperties: 6, consistent: true },
-          ImportDeclaration: { multiline: true, minProperties: 8, consistent: true },
-          ExportDeclaration: { multiline: true, minProperties: 8, consistent: true },
-        },
-      ],
+      "object-curly-newline": ["error", {
+        ObjectExpression: { multiline: true },
+        ObjectPattern: { multiline: true },
+        ImportDeclaration: { multiline: true },
+        ExportDeclaration: { multiline: true }
+      }],
       "object-property-newline": ["error", { allowAllPropertiesOnSameLine: true }],
+
+      // Arrays
       "array-bracket-spacing": ["error", "never"],
       "array-bracket-newline": ["error", { multiline: true, minItems: 8 }],
       "array-element-newline": ["error", { ArrayExpression: "consistent", ArrayPattern: { minItems: 8 } }],
 
-      // Function formatting - allow compact
+      // Functions
       "function-paren-newline": ["error", "consistent"],
       "function-call-argument-newline": ["error", "consistent"],
 
-      // Line length and spacing
-      "max-len": [
-        "warn",
-        {
-          code: 250,
-          ignoreStrings: true,
-          ignoreTemplateLiterals: true,
-          ignoreComments: true,
-          ignoreUrls: true,
-          ignoreRegExpLiterals: true,
-        },
-      ],
-
-      // Semicolons and commas
-      semi: ["error", "always"],
-      "comma-dangle": ["error", "only-multiline"],
-      "comma-spacing": ["error", { before: false, after: true }],
-
-      // JSX formatting - prefer compact single-line elements
-      // Note: React ESLint plugin rules would go here if available
-
-      // Additional compact formatting rules
-      indent: ["error", 2, { SwitchCase: 1, ignoredNodes: ["JSXElement", "JSXFragment"] }],
-      "no-multi-spaces": ["error", { ignoreEOLComments: true }],
-      "key-spacing": ["error", { beforeColon: false, afterColon: true, mode: "strict" }],
-
-      // Block formatting - encourage single line for simple blocks
-      "block-spacing": ["error", "always"],
-      "keyword-spacing": ["error", { before: true, after: true }],
+      // Line length
+      "max-len": ["warn", {
+        code: 250,
+        ignoreStrings: true,
+        ignoreTemplateLiterals: true,
+        ignoreComments: true,
+        ignoreUrls: true,
+        ignoreRegExpLiterals: true
+      }],
 
-      // React hooks formatting
+      // React hooks
       "react-hooks/rules-of-hooks": "error",
-      "react-hooks/exhaustive-deps": "warn",
+      "react-hooks/exhaustive-deps": "off",
     },
   },
-  prettier,
 ]);