diff --git a/package-lock.json b/package-lock.json
index 355dce1e14..653c6c4676 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -615,6 +615,15 @@
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+        "@types/minimatch": "*",
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@@ -837,6 +875,16 @@
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+          "resolved": "https://registry.npmjs.org/callsites/-/callsites-2.0.0.tgz",
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@@ -1770,6 +1850,31 @@
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+      "resolved": "https://registry.npmjs.org/cli-cursor/-/cli-cursor-2.1.0.tgz",
+      "integrity": "sha1-s12sN2R5+sw+lHR9QdDQ9SOP/LU=",
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@@ -2091,6 +2220,12 @@
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@@ -3019,6 +3183,16 @@
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@@ -4428,6 +4724,12 @@
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+      }
+    },
     "p-reduce": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/p-reduce/-/p-reduce-1.0.0.tgz",
@@ -8080,6 +8788,27 @@
         }
       }
     },
+    "restore-cursor": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/restore-cursor/-/restore-cursor-2.0.0.tgz",
+      "integrity": "sha1-n37ih/gv0ybU/RYpI9YhKe7g368=",
+      "dev": true,
+      "requires": {
+        "onetime": "^2.0.0",
+        "signal-exit": "^3.0.2"
+      },
+      "dependencies": {
+        "onetime": {
+          "version": "2.0.1",
+          "resolved": "https://registry.npmjs.org/onetime/-/onetime-2.0.1.tgz",
+          "integrity": "sha1-BnQoIw/WdEOyeUsiu6UotoZ5YtQ=",
+          "dev": true,
+          "requires": {
+            "mimic-fn": "^1.0.0"
+          }
+        }
+      }
+    },
     "ret": {
       "version": "0.1.15",
       "resolved": "https://registry.npmjs.org/ret/-/ret-0.1.15.tgz",
@@ -8128,6 +8857,12 @@
       "integrity": "sha512-nfMOlASu9OnRJo1mbEk2cz0D56a1MBNrJ7orjRZQG10XDyuvwksKbuXNp6qa+kbn839HwjwhBzhFmdsaEAfauA==",
       "dev": true
     },
+    "run-node": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/run-node/-/run-node-1.0.0.tgz",
+      "integrity": "sha512-kc120TBlQ3mih1LSzdAJXo4xn/GWS2ec0l3S+syHDXP9uRr0JAT8Qd3mdMuyjqCzeZktgP3try92cEgf9Nks8A==",
+      "dev": true
+    },
     "run-parallel": {
       "version": "1.1.9",
       "resolved": "https://registry.npmjs.org/run-parallel/-/run-parallel-1.1.9.tgz",
@@ -8457,6 +9192,12 @@
       "integrity": "sha1-xB8vbDn8FtHNF61LXYlhFK5HDVU=",
       "dev": true
     },
+    "slice-ansi": {
+      "version": "0.0.4",
+      "resolved": "https://registry.npmjs.org/slice-ansi/-/slice-ansi-0.0.4.tgz",
+      "integrity": "sha1-7b+JA/ZvfOL46v1s7tZeJkyDGzU=",
+      "dev": true
+    },
     "slugify": {
       "version": "1.3.5",
       "resolved": "https://registry.npmjs.org/slugify/-/slugify-1.3.5.tgz",
@@ -8896,6 +9637,12 @@
       "integrity": "sha1-ucczDHBChi9rFC3CdLvMWGbONUY=",
       "dev": true
     },
+    "string-argv": {
+      "version": "0.3.1",
+      "resolved": "https://registry.npmjs.org/string-argv/-/string-argv-0.3.1.tgz",
+      "integrity": "sha512-a1uQGz7IyVy9YwhqjZIZu1c8JO8dNIe20xBmSS6qu9kv++k3JGzCVmprbNN5Kn+BgzD5E7YYwg1CcjuJMRNsvg==",
+      "dev": true
+    },
     "string-length": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/string-length/-/string-length-2.0.0.tgz",
@@ -9015,6 +9762,12 @@
       "integrity": "sha1-u0P/VZim6wXYm1n80SnJgzE2Br8=",
       "dev": true
     },
+    "strip-final-newline": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/strip-final-newline/-/strip-final-newline-2.0.0.tgz",
+      "integrity": "sha512-BrpvfNAE3dcvq7ll3xVumzjKjZQ5tI1sEUIKr3Uoks0XUl45St3FlatVqef9prk4jRDzhW6WZg+3bk93y6pLjA==",
+      "dev": true
+    },
     "stylus-lookup": {
       "version": "3.0.2",
       "resolved": "https://registry.npmjs.org/stylus-lookup/-/stylus-lookup-3.0.2.tgz",
@@ -9354,6 +10107,12 @@
       "integrity": "sha1-yy4SAwZ+DI3h9hQJS5/kVwTqYAM=",
       "dev": true
     },
+    "tslib": {
+      "version": "1.10.0",
+      "resolved": "https://registry.npmjs.org/tslib/-/tslib-1.10.0.tgz",
+      "integrity": "sha512-qOebF53frne81cf0S9B41ByenJ3/IuH8yJKngAX35CmiZySA0khhkovshKK+jGCaMnVomla7gVlIcc3EvKPbTQ==",
+      "dev": true
+    },
     "tunnel-agent": {
       "version": "0.6.0",
       "resolved": "https://registry.npmjs.org/tunnel-agent/-/tunnel-agent-0.6.0.tgz",
@@ -9378,6 +10137,12 @@
         "prelude-ls": "~1.1.2"
       }
     },
+    "type-fest": {
+      "version": "0.6.0",
+      "resolved": "https://registry.npmjs.org/type-fest/-/type-fest-0.6.0.tgz",
+      "integrity": "sha512-q+MB8nYR1KDLrgr4G5yemftpMC7/QLqVndBmEEdqzmNj5dcFOO4Oo8qlwZE3ULT3+Zim1F8Kq4cBnikNhlCMlg==",
+      "dev": true
+    },
     "typescript": {
       "version": "3.6.2",
       "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.6.2.tgz",
diff --git a/package.json b/package.json
index ddc1b5f6f5..18c952e51a 100644
--- a/package.json
+++ b/package.json
@@ -4,11 +4,10 @@
   "private": true,
   "description": "A project to teach people how to do their first pull request",
   "scripts": {
+    "lint-staged": "lint-staged",
     "start": "eleventy --serve",
     "build": "eleventy",
-    "format:json": "node tasks/sortPixels.js",
     "prettier": "prettier --write \"**/*.js\"",
-    "pretest": "run-s format:json prettier",
     "test": "jest"
   },
   "repository": {
@@ -28,12 +27,29 @@
     "common-tags": "^1.8.0",
     "danger": "^9.2.0",
     "dot-prop": "^5.1.0",
+    "husky": "^3.0.8",
     "jest": "^24.9.0",
     "json-stringify-pretty-compact": "^2.0.0",
+    "lint-staged": "^9.4.1",
     "npm-run-all": "^4.1.5",
     "prettier": "^1.18.2"
   },
   "dependencies": {
     "nes.css": "^2.2.0"
+  },
+  "husky": {
+    "hooks": {
+      "pre-commit": "run-s lint-staged test"
+    }
+  },
+  "lint-staged": {
+    "*.{js,jsx,ts,tsx}": [
+      "prettier --write",
+      "git add"
+    ],
+    "_data/pixels.json": [
+      "node tasks/sortPixels.js",
+      "git add"
+    ]
   }
 }