jshint + jscs (jshintignore, jshintrc, jscs)

.jscsrc

{
    "preset": "google",
    "fileExtensions": [".js", "jscs"],

    "requireSemicolons": true,
    "requireParenthesesAroundIIFE": true,
    "maximumLineLength": 120,
    "validateLineBreaks": "LF",
    "validateIndentation": 4,
    "disallowTrailingComma": true,
    "disallowUnusedParams": true,

    "disallowSpacesInsideObjectBrackets": null,
    "disallowImplicitTypeConversion": ["string"],

    "safeContextKeyword": "_this",

    "jsDoc": {
        "checkAnnotations": "closurecompiler",
        "checkParamNames": true,
        "requireParamTypes": true,
        "checkRedundantParams": true,
        "checkReturnTypes": true,
        "checkRedundantReturns": true,
        "requireReturnTypes": true,
        "checkTypes": "capitalizedNativeCase",
        "checkRedundantAccess": true,
        "requireNewlineAfterDescription": true
    },

    "excludeFiles": [
        "node_modules/**/*.js",
        "bad.js",
        "Gruntfile.js"
    ]
}

.jshintignore

node_modules/**/*.js
bad.js
Gruntfile.j

.jshintrc

{
  "boss": true,
  "curly": true,
  "eqeqeq": true,
  "eqnull": true,
  "immed": true,
  "latedef": true,
  "newcap": true,
  "noarg": true,
  "sub": true,
  "undef": true,
  "unused": true,
  "node": true,
  "-W117": true
}

bad.js

eval("test");

good.js

console.log('test');

Gruntfile.js

module.exports = function (grunt) {
  require('load-grunt-tasks')(grunt);

  grunt.initConfig({
    
    jscs: {
      src: "**/*.js",
      options: {
        config: ".jscsrc"
      }
    },

    jshint: {
      options: {
        jshintrc: true
      },
      uses_defaults: ['**/*.js'],
    }
  });
  grunt.registerTask('default', ['jscs', 'jshint']);
};

package.json

{
  "name": "projects",
  "version": "1.0.0",
  "main": "index.js",
  "devDependencies": {
    "grunt": "^0.4.5",
    "grunt-contrib-jshint": "^0.11.3",
    "grunt-jscs": "^2.5.0",
    "load-grunt-tasks": "^3.3.0"
  }
}