diff --git a/package-lock.json b/package-lock.json
index d9ce2358c..2ebe14005 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -325,6 +325,16 @@
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@@ -835,6 +845,25 @@
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@@ -1349,6 +1481,7 @@
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@@ -1357,6 +1490,12 @@
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+      "resolved": "https://registry.npmjs.org/ci-env/-/ci-env-1.5.2.tgz",
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@@ -2102,6 +2241,15 @@
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@@ -2635,6 +2783,26 @@
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       "dev": true
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@@ -2694,6 +2862,910 @@
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@@ -5060,6 +6298,46 @@
       "integrity": "sha1-gV7R9uvGWSb4ZbMQwHE7yzMVzks=",
       "dev": true
     },
+    "prettycli": {
+      "version": "1.4.3",
+      "resolved": "https://registry.npmjs.org/prettycli/-/prettycli-1.4.3.tgz",
+      "integrity": "sha512-KLiwAXXfSWXZqGmZlnKPuGMTFp+0QbcySplL1ft9gfteT/BNsG64Xo8u2Qr9r+qnsIZWBQ66Zs8tg+8s2fmzvw==",
+      "dev": true,
+      "requires": {
+        "chalk": "2.1.0"
+      },
+      "dependencies": {
+        "ansi-styles": {
+          "version": "3.2.0",
+          "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-3.2.0.tgz",
+          "integrity": "sha512-NnSOmMEYtVR2JVMIGTzynRkkaxtiq1xnFBcdQD/DnNCYPoEPsVJhM98BDyaoNOQIi7p4okdi3E27eN7GQbsUug==",
+          "dev": true,
+          "requires": {
+            "color-convert": "1.9.1"
+          }
+        },
+        "chalk": {
+          "version": "2.1.0",
+          "resolved": "https://registry.npmjs.org/chalk/-/chalk-2.1.0.tgz",
+          "integrity": "sha512-LUHGS/dge4ujbXMJrnihYMcL4AoOweGnw9Tp3kQuqy1Kx5c1qKjqvMJZ6nVJPMWJtKCTN72ZogH3oeSO9g9rXQ==",
+          "dev": true,
+          "requires": {
+            "ansi-styles": "3.2.0",
+            "escape-string-regexp": "1.0.5",
+            "supports-color": "4.5.0"
+          }
+        },
+        "supports-color": {
+          "version": "4.5.0",
+          "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-4.5.0.tgz",
+          "integrity": "sha1-vnoN5ITexcXN34s9WRJQRJEvY1s=",
+          "dev": true,
+          "requires": {
+            "has-flag": "2.0.0"
+          }
+        }
+      }
+    },
     "private": {
       "version": "0.1.8",
       "resolved": "https://registry.npmjs.org/private/-/private-0.1.8.tgz",
@@ -5656,6 +6934,12 @@
         "is-promise": "2.1.0"
       }
     },
+    "rx": {
+      "version": "4.1.0",
+      "resolved": "https://registry.npmjs.org/rx/-/rx-4.1.0.tgz",
+      "integrity": "sha1-pfE/957zt0D+MKqAP7CfmIBdR4I=",
+      "dev": true
+    },
     "rx-lite": {
       "version": "4.0.8",
       "resolved": "https://registry.npmjs.org/rx-lite/-/rx-lite-4.0.8.tgz",
@@ -6778,6 +8062,7 @@
           "requires": {
             "anymatch": "1.3.2",
             "async-each": "1.0.1",
+            "fsevents": "1.1.3",
             "glob-parent": "2.0.0",
             "inherits": "2.0.3",
             "is-binary-path": "1.0.1",
diff --git a/package.json b/package.json
index 520746c9c..cc96c381e 100644
--- a/package.json
+++ b/package.json
@@ -10,11 +10,12 @@
     "doc:start": "nodemon --watch src --exec 'npm run doc'",
     "check-built-assets": "echo 'CHECKING BUILD SOURCES ARE COMMITED' && rm -rf test-build && mv resources/dist test-build && npm run build && diff -x '*.map' -r test-build resources/dist && rm -rf test-build",
     "coverage": "istanbul cover node_modules/.bin/mw-node-qunit tests/node-qunit/*.js tests/node-qunit/**/*.js",
-    "precommit": "npm run test:dev && npm run build && git add resources/dist"
+    "precommit": "npm run test:dev && npm run build && git add resources/dist && bundlesize"
   },
   "devDependencies": {
     "babel-preset-env": "^1.6.0",
     "babel-register": "^6.24.1",
+    "bundlesize": "0.15.3",
     "eslint-config-wikimedia": "0.5.0",
     "grunt": "1.0.1",
     "grunt-banana-checker": "0.6.0",
@@ -33,5 +34,11 @@
     "stylelint-config-wikimedia": "0.4.1",
     "tap-dot": "^1.0.5",
     "webpack": "^2.6.0"
-  }
+  },
+  "bundlesize": [
+    {
+      "path": "resources/dist/index.js",
+      "maxSize": "11.2KB"
+    }
+  ]
 }