diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
deleted file mode 100644
index e7f5da9e..00000000
--- a/CONTRIBUTING.md
+++ /dev/null
@@ -1,181 +0,0 @@
-# Contributing to the Firebase Node.JS Quickstarts
-
-We'd love for you to contribute to our source code and to make the Firebase Node.JS Quickstarts even better than it is today! Here are the guidelines we'd like you to follow:
-
- - [Code of Conduct](#coc)
- - [Question or Problem?](#question)
- - [Issues and Bugs](#issue)
- - [Feature Requests](#feature)
- - [Submission Guidelines](#submit)
- - [Coding Rules](#rules)
- - [Signing the CLA](#cla)
-
-## <a name="coc"></a>Code of Conduct
-
-As contributors and maintainers of the Firebase Node.JS Quickstarts project, we pledge to respect everyone who contributes by posting issues, updating documentation, submitting pull requests, providing feedback in comments, and any other activities.
-
-Communication through any of Firebase's channels (GitHub, StackOverflow, Google+, Twitter, etc.) must be constructive and never resort to personal attacks, trolling, public or private harassment, insults, or other unprofessional conduct.
-
-We promise to extend courtesy and respect to everyone involved in this project regardless of gender, gender identity, sexual orientation, disability, age, race, ethnicity, religion, or level of experience. We expect anyone contributing to the project to do the same.
-
-If any member of the community violates this code of conduct, the maintainers of the Firebase Node.JS Quickstarts project may take action, removing issues, comments, and PRs or blocking accounts as deemed appropriate.
-
-If you are subject to or witness unacceptable behavior, or have any other concerns, please drop us a line at nivco@google.com.
-
-## <a name="question"></a>Got a Question or Problem?
-
-If you have questions about how to use the Firebase Node.JS Quickstarts, please direct these to [StackOverflow][stackoverflow] and use the `firebase` tag. We are also available on GitHub issues.
-
-If you feel that we're missing an important bit of documentation, feel free to
-file an issue so we can help. Here's an example to get you started:
-
-```
-What are you trying to do or find out more about?
-
-Where have you looked?
-
-Where did you expect to find this information?
-```
-
-## <a name="issue"></a>Found an Issue?
-If you find a bug in the source code or a mistake in the documentation, you can help us by
-submitting an issue to our [GitHub Repository][github]. Even better you can submit a Pull Request
-with a fix.
-
-See [below](#submit) for some guidelines.
-
-## <a name="submit"></a>Submission Guidelines
-
-### Submitting an Issue
-Before you submit your issue search the archive, maybe your question was already answered.
-
-If your issue appears to be a bug, and hasn't been reported, open a new issue.
-Help us to maximize the effort we can spend fixing issues and adding new
-features, by not reporting duplicate issues.  Providing the following information will increase the
-chances of your issue being dealt with quickly:
-
-* **Overview of the Issue** - if an error is being thrown a non-minified stack trace helps
-* **Motivation for or Use Case** - explain why this is a bug for you
-* **Browsers and Operating System** - is this a problem with all browsers or only IE9?
-* **Reproduce the Error** - provide a live example (using JSBin) or a unambiguous set of steps.
-* **Related Issues** - has a similar issue been reported before?
-* **Suggest a Fix** - if you can't fix the bug yourself, perhaps you can point to what might be
-  causing the problem (line of code or commit)
-
-**If you get help, help others. Good karma rulez!**
-
-Here's a template to get you started:
-
-```
-Browser:
-Browser version:
-Operating system:
-Operating system version:
-
-What steps will reproduce the problem:
-1.
-2.
-3.
-
-What is the expected result?
-
-What happens instead of that?
-
-Please provide any other information below, and attach a screenshot if possible.
-```
-
-### Submitting a Pull Request
-Before you submit your pull request consider the following guidelines:
-
-* Search [GitHub](https://github.com/firebase/quickstart-nodejs/pulls) for an open or closed Pull Request
-  that relates to your submission. You don't want to duplicate effort.
-* Please sign our [Contributor License Agreement (CLA)](#cla) before sending pull
-  requests. We cannot accept code without this.
-* Make your changes in a new git branch:
-
-     ```shell
-     git checkout -b my-fix-branch master
-     ```
-
-* Create your patch, **including appropriate test cases**.
-* Follow our [Coding Rules](#rules).
-* Avoid checking in files that shouldn't be tracked (e.g `node_modules`, `gulp-cache`, `.tmp`, `.idea`). We recommend using a [global](#global-gitignore) gitignore for this.
-* Make sure **not** to include a recompiled version of the files found in `/css` and `/js` as part of your PR. We will generate these automatically.
-* Commit your changes using a descriptive commit message.
-
-     ```shell
-     git commit -a
-     ```
-  Note: the optional commit `-a` command line option will automatically "add" and "rm" edited files.
-
-* Build your changes locally to ensure all the tests pass:
-
-    ```shell
-   gulp
-    ```
-
-* Push your branch to GitHub:
-
-    ```shell
-    git push origin my-fix-branch
-    ```
-
-* In GitHub, send a pull request to `/quickstart-nodejs:master`.
-* If we suggest changes then:
-  * Make the required updates.
-  * Rebase your branch and force push to your GitHub repository (this will update your Pull Request):
-
-    ```shell
-    git rebase master -i
-    git push origin my-fix-branch -f
-    ```
-
-That's it! Thank you for your contribution!
-
-#### After your pull request is merged
-
-After your pull request is merged, you can safely delete your branch and pull the changes
-from the main (upstream) repository:
-
-* Delete the remote branch on GitHub either through the GitHub web UI or your local shell as follows:
-
-    ```shell
-    git push origin --delete my-fix-branch
-    ```
-
-* Check out the master branch:
-
-    ```shell
-    git checkout master -f
-    ```
-
-* Delete the local branch:
-
-    ```shell
-    git branch -D my-fix-branch
-    ```
-
-* Update your master with the latest upstream version:
-
-    ```shell
-    git pull --ff upstream master
-    ```
-
-## <a name="rules"></a>Coding Rules
-
-We generally follow the [Google JavaScript style guide][js-style-guide].
-
-## <a name="cla"></a>Signing the CLA
-
-Please sign our [Contributor License Agreement][google-cla] (CLA) before sending pull requests. For any code
-changes to be accepted, the CLA must be signed. It's a quick process, we promise!
-
-*This guide was inspired by the [AngularJS contribution guidelines](https://github.com/angular/angular.js/blob/master/CONTRIBUTING.md).*
-
-[github]: https://github.com/firebase/quickstart-nodejs
-[google-cla]: https://cla.developers.google.com
-[js-style-guide]: http://google.github.io/styleguide/javascriptguide.xml
-[py-style-guide]: http://google.github.io/styleguide/pyguide.html
-[jsbin]: http://jsbin.com/
-[stackoverflow]: http://stackoverflow.com/questions/tagged/firebase
-[global-gitignore]: https://help.github.com/articles/ignoring-files/#create-a-global-gitignore
diff --git a/LICENSE b/LICENSE
deleted file mode 100644
index 9faf1086..00000000
--- a/LICENSE
+++ /dev/null
@@ -1,212 +0,0 @@
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diff --git a/README.md b/README.md
deleted file mode 100644
index 0a00c048..00000000
--- a/README.md
+++ /dev/null
@@ -1,9 +0,0 @@
-# Firebase Quickstarts for Node.js
-
-A collection of quickstart samples demonstrating the Firebase APIs using the Node.js Admin SDK. For more information, see https://firebase.google.com.
-
-## How to make contributions?
-Please read and follow the steps in the [CONTRIBUTING.md](CONTRIBUTING.md)
-
-## License
-See [LICENSE](LICENSE)
diff --git a/TUTORIAL.md b/TUTORIAL.md
new file mode 100644
index 00000000..c00a2438
--- /dev/null
+++ b/TUTORIAL.md
@@ -0,0 +1,299 @@
+# Test Security Rules with Firebase Emulators and Cloud Shell
+
+## Introduction
+
+Hi Firebase Security Rules developer! Welcome to Google Cloud Shell. We'll explain what this environment is all about shortly, but for now a quick orientation:
+
++   The panel you're reading this text in is called the Learn Assistant.
++   At left, the bottom panel is a full-featured command shell, essentially a Google-hosted virtual machine with this Web interface, called the Google Cloud Shell.
++   At left, a file browser and editor panel let you browse directories in this Cloud Shell instance and edit local files.
+
+You're likely here by way of the Rules interface in Firebase console, interested in learning how you can use offline Firebase emulators to prototype and test Security Rules for your Firebase project.
+
+The news is good. This Cloud Shell instance is already configured with Firebase emulators including Security Rules engine, and a simple testing framework designed with Security Rules development in mind.
+
+To get started with the walkthrough...well, click `Start` below.
+
+## Check out a Security Rules tutorial project
+
+Let's check some tutorial samples out from GitHub and some tools out of npm. 
+
+![Copy to Cloud Shell control](https://firebase.google.com/docs/rules/images/la_copy_to_shell.png "Copy to Cloud Shell control") -- in the snippets below, use this control to paste commands straight to the Cloud Shell prompt.
+
+1.  Set up a directory structure to organize tutorial project files plus your own project(s).
+
+> Note: As shown below, please create the following directory from the **root** of your Cloud Shell home directory.  
+```bash  
+cd ~; mkdir rules-tutorial  
+```
+
+2.  Switch to the tutorial working directory.
+
+```bash  
+cd ~/rules-tutorial  
+```
+
+3.  Check out the tutorial project from Github.
+
+```bash  
+git clone -b rpb/markarndt https://github.com/firebase/quickstart-nodejs
+```
+
+4.  Change directory to the tutorial project.
+
+```bash  
+cd quickstart-nodejs/cs-walkthrough/
+```
+
+4.  Install the Firebase Test SDK and a few more tools.
+
+```bash  
+npm --prefix=functions install  
+```
+
+## Using the Learn Assistant
+
+OK, setup is done.
+
+This Learn Assistant has some convenient features we'll take advantage of for this walkthrough. Let's try them out.
+
+Note: Be sure you've followed the previous topic and created the home directory structure explained there.
+
+1.  You'll be **opening** a series of Security Rules template files. Click to open <walkthrough-editor-open-file filePath="./rules-tutorial/quickstart-nodejs/cs-walkthrough/rules-examples/firestore.rules_template_0">the first, which is firebase.rules_template_0</walkthrough-editor-open-file>.
+2.  In those template files, you'll **review** descriptions and comments on security rules. Click to select <walkthrough-editor-select-line filePath="./rules-tutorial/quickstart-nodejs/cs-walkthrough/rules-examples/firestore.rules_template_0" startLine=6 startCharacterOffset=0 endLine=7 endCharacterOffset=0>some discussion of a rule definition</walkthrough-editor-select-line>.
+3.  After reviewing rule definitions, you'll **edit** rules and **save the changes** in preparation for re-running the test suite. Click to select <walkthrough-editor-select-line filePath="./rules-tutorial/quickstart-nodejs/cs-walkthrough/rules-examples/firestore.rules_template_0" startLine=7 startCharacterOffset=0 endLine=9 endCharacterOffset=0>code modification instructions</walkthrough-editor-select-line>.
+4.  At the Cloud Shell prompt, you'll **copy the template file to update your main tutorial firestore.rules file**.
+
+```bash   
+cp ~/rules-tutorial/quickstart-nodejs/cs-walkthrough/rules-examples/firestore.rules_template_0 \
+   ~/rules-tutorial/quickstart-nodejs/cs-walkthrough/firestore.rules
+```  
+We'll present most of the walkthrough content and hands-on exercises this way, so repeat the above sequence as many times as you like to get comfortable with this interaction.
+
+## Security Rules basics
+
+You'll get the most out of this walkthrough if you already have some experience with the Firestore Security Rules language and have in your own project modified the default ```firestore.rules``` file with rules tailored to your data. 
+**If you are already familiar with Security Rules basics, you can skip this slide by hitting "Next"**.
+
+Here are the basics about Rules statements. If these concepts are unfamiliar, you might review [Structuring Cloud Firestore Security Rules](https://firebase.google.com/docs/firestore/security/rules-structure).
+
+### Service and database declaration
+Cloud Firestore Security Rules always begin with the following declaration:
+```
+service cloud.firestore {
+  match /databases/{database}/documents {
+    // ...
+  }
+}
+```
+The service cloud.firestore declaration scopes the rules to Cloud Firestore, preventing conflicts between Cloud Firestore Security Rules and rules for other products such as Cloud Storage.
+
+The match /databases/{database}/documents declaration specifies that rules should match any Cloud Firestore database in the project. Currently each project has only a single database named (default).
+
+### Basic read/write rules
+Basic rules consist of a ```match``` statement specifying a document path and an ```allow``` expression detailing when reading the specified data is allowed:
+```
+service cloud.firestore {
+  match /databases/{database}/documents {
+
+    // Match any document in the 'cities' collection
+    match /cities/{city} {
+      allow read: if <condition>;
+      allow write: if <condition>;
+    }
+  }
+}
+```
+All match statements should point to documents, not collections. A match statement can point to a specific document, as in match /cities/SF or use wildcards to point to any document in the specified path, as in match /cities/{city}.
+
+## Emulator Suite and Firebase Test SDK basics
+
+Let's start up the Firestore emulator and run the test suite developed with the Firebase Test SDK.
+
+1.  Start the Firestore and Cloud Functions emulators.
+
+```bash  
+firebase emulators:start --only firestore,functions 
+```
+
+2.  Wait briefly until the Firestore and Cloud Functions emulators have started up. You'll see terminal output saying it's safe to connect.
+3.  Add a <walkthrough-spotlight-pointer cssSelector="#devshell-editor-app;div.p6n-devshell-editor-app-body.layout-row.flex;div.layout-column.flex;pan-dev-shell;div;div.p6n-devshell-header.p6n-action-bar;div:nth-child(6);csh-new-tab-menu;div;button.main.dense.mat-icon-button.mat-button-base;span;mat-icon
+">new Cloud Shell session</walkthrough-spotlight-pointer>. You can do so manually by clicking the + control ("Open a new tab") in the menu above the Cloud Shell terminal window. The emulators keep running in parallel, in our original session.
+4.  At the new session prompt, change directory to our Security Rules walkthrough project.
+
+```bash  
+cd ~/rules-tutorial/quickstart-nodejs/cs-walkthrough/
+```
+
+5.  Run the test suite.
+
+```bash  
+npm --prefix=functions test  
+```  
+Awesome. We're going to peek under the hood next, but the gist is our test suite populated the Firestore emulator with data and made a series of access requests, which were allowed and denied according to our Security Rules, and checked per our test cases.
+
+All of the tests pass, isn't that great? Well, that depends on how secure our app *really* is and just what exactly the tests are confirming. Let's take a look...
+
+## What data are we securing?
+
+Our tests are written with a simple eCommerce app in mind. We have ```users```, and database entries for shopping ```carts```, and ```items``` to put in those carts.
+
+The emulated Firestore database for our tests will be created as we go, populated then deleted at each execution of the test suite, by the Firebase Test SDK.
+
+![Copy to Cloud Shell control](https://firebase.google.com/docs/rules/images/cs_walkthrough_datamodel.png "eCommerce Data Model for Security Rules Walkthrough")
+
+Note that the data model contains collections (`carts` and `items`) and documents within those collections (`alicesCart` and `lemon`). You can review the [documentation about Firestore hierarchical data models](https://firebase.google.com/docs/firestore/data-model#hierarchical-data).
+
+## Lock down Security Rules
+
+The default ```firestore.rules``` in this walkthrough are set with open security. That is, all operations are permitted on all documents in the database. Our rules tests confirm that operations on the database are permitted, so everything passes.
+
+The Firebase emulators are waiting for more database interactions and Security Rules evaluations, so let's update ```firestore.rules``` to improve security and re-run the tests!
+
+1. Open <walkthrough-editor-open-file filePath="./rules-tutorial/quickstart-nodejs/cs-walkthrough/rules-examples/firestore.rules_template_1">firestore.rules_template_1</walkthrough-editor-open-file>. 
+
+2. **Review** the two rules definitions in this file:
+
+* A definition that applies to all documents in the database, <walkthrough-editor-select-line filePath="./rules-tutorial/quickstart-nodejs/cs-walkthrough/rules-examples/firestore.rules_template_1" startLine=9 startCharacterOffset=0 endLine=14 endCharacterOffset=0>here</walkthrough-editor-select-line>.
+* A definition that applies to items in the items collection, <walkthrough-editor-select-line filePath="./rules-tutorial/quickstart-nodejs/cs-walkthrough/rules-examples/firestore.rules_template_1" startLine=25 startCharacterOffset=0 endLine=31 endCharacterOffset=0>here</walkthrough-editor-select>.
+
+3. Now **edit the rules** to <walkthrough-editor-select-line filePath="./rules-tutorial/quickstart-nodejs/cs-walkthrough/rules-examples/firestore.rules_template_1" startLine=14 startCharacterOffset=0 endLine=23 endCharacterOffset=0>begin tightening security</walkthrough-editor-select-line>.
+
+4. Using your modified and **saved** firestore.rules_template_1 file, **copy/replace to update firestore.rules**.
+
+The emulators automatically detect these `.rules` file changes and load the new rules. 
+
+```bash
+cp ~/rules-tutorial/quickstart-nodejs/cs-walkthrough/rules-examples/firestore.rules_template_1 \
+   ~/rules-tutorial/quickstart-nodejs/cs-walkthrough/firestore.rules
+```
+
+5.  Run the tests again.
+```bash
+npm --prefix=functions test  
+```
+
+We've now fully locked down the data, so we go from 4 test successes to 4 failures. But now that we're secure, we can start to allow database access with appropriate rules.
+
+
+## Let users create shopping carts
+
+First let's look at at letting users create carts in a secure way.
+
+1. Open <walkthrough-editor-open-file filePath="./rules-tutorial/quickstart-nodejs/cs-walkthrough/rules-examples/firestore.rules_template_2">firestore.rules_template_2</walkthrough-editor-open-file>. 
+
+2. **Review** and **edit** the ```match``` statement controlling access to ```cart``` documents:
+
+* Review the ```match``` statement <walkthrough-editor-select-line filePath="./rules-tutorial/quickstart-nodejs/cs-walkthrough/rules-examples/firestore.rules_template_2" startLine=10 startCharacterOffset=0 endLine=14 endCharacterOffset=0>here</walkthrough-editor-select-line>.
+
+* Edit the ```match``` statement <walkthrough-editor-select-line filePath="./rules-tutorial/quickstart-nodejs/cs-walkthrough/rules-examples/firestore.rules_template_2" startLine=14 startCharacterOffset=0 endLine=18 endCharacterOffset=0>here</walkthrough-editor-select-line>.
+
+3. Now **review** and **edit** the ```allow``` statement to narrow down who can interact with selected ```cart``` documents:
+
+* Review the notes about the current and proposed ```allow``` statement <walkthrough-editor-select-line filePath="./rules-tutorial/quickstart-nodejs/cs-walkthrough/rules-examples/firestore.rules_template_2" startLine=18 startCharacterOffset=0 endLine=20 endCharacterOffset=0>here</walkthrough-editor-select-line>.
+
+* And then edit <walkthrough-editor-select-line filePath="./rules-tutorial/quickstart-nodejs/cs-walkthrough/rules-examples/firestore.rules_template_2" startLine=20 startCharacterOffset=0 endLine=24 endCharacterOffset=0>here</walkthrough-editor-select-line>.
+
+4. **Copy** the modified and **saved** firestore.rules_template_2 file to update ```firestore.rules```.
+```bash
+cp ~/rules-tutorial/quickstart-nodejs/cs-walkthrough/rules-examples/firestore.rules_template_2 \
+   ~/rules-tutorial/quickstart-nodejs/cs-walkthrough/firestore.rules
+```
+
+5.  Run the tests again.
+```bash
+npm --prefix=functions test
+```
+
+Great, 1 test passed, 3 more to go.
+
+## Let users read, update and delete their carts
+
+The next test covers the case of a cart owner having the ability to read, update, or delete their cart.
+
+1. Open <walkthrough-editor-open-file filePath="./rules-tutorial/quickstart-nodejs/cs-walkthrough/rules-examples/firestore.rules_template_3">firestore.rules_template_3</walkthrough-editor-open-file>. 
+
+2. Now **review** and **edit** the template to add to the ```allow``` statement:
+
+* Review the notes about this addition <walkthrough-editor-select-line filePath="./rules-tutorial/quickstart-nodejs/cs-walkthrough/rules-examples/firestore.rules_template_3" startLine=13 startCharacterOffset=0 endLine=21 endCharacterOffset=0>here</walkthrough-editor-select-line>.
+
+* And then edit <walkthrough-editor-select-line filePath="./rules-tutorial/quickstart-nodejs/cs-walkthrough/rules-examples/firestore.rules_template_3" startLine=21 startCharacterOffset=0 endLine=24 endCharacterOffset=0>here</walkthrough-editor-select-line>.
+
+3. **Copy** the modified and **saved** firestore.rules_template_3 file to update ```firestore.rules```.
+```bash
+cp ~/rules-tutorial/quickstart-nodejs/cs-walkthrough/rules-examples/firestore.rules_template_3 \
+   ~/rules-tutorial/quickstart-nodejs/cs-walkthrough/firestore.rules
+```
+
+4.  Run the tests.
+```bash
+npm --prefix=functions test
+```
+
+There we go. Now 2 passing tests.
+
+## Let users put items in their cart
+
+Empty carts are no good. Let's write a new set of ```match``` and ```allow``` statements so users can add items to their carts as as long as they own the cart.
+
+1. Open <walkthrough-editor-open-file filePath="./rules-tutorial/quickstart-nodejs/cs-walkthrough/rules-examples/firestore.rules_template_4">firestore.rules_template_4</walkthrough-editor-open-file>. 
+
+2. Now **review** and **edit** the template to add new rule statements:
+
+* Review the notes about this addition <walkthrough-editor-select-line filePath="./rules-tutorial/quickstart-nodejs/cs-walkthrough/rules-examples/firestore.rules_template_4" startLine=15 startCharacterOffset=0 endLine=24 endCharacterOffset=0>here</walkthrough-editor-select-line>.
+
+* And then edit <walkthrough-editor-select-line filePath="./rules-tutorial/quickstart-nodejs/cs-walkthrough/rules-examples/firestore.rules_template_4" startLine=24 startCharacterOffset=0 endLine=31 endCharacterOffset=0>here</walkthrough-editor-select-line>.
+
+3. **Copy** the modified and **saved** firestore.rules_template_4 file to update ```firestore.rules```.
+```bash
+cp ~/rules-tutorial/quickstart-nodejs/cs-walkthrough/rules-examples/firestore.rules_template_4 \
+   ~/rules-tutorial/quickstart-nodejs/cs-walkthrough/firestore.rules
+```
+
+4.  Run the tests.
+```bash
+npm --prefix=functions test
+```
+
+Almost there. Let's adjust the rules for our final test case.
+
+## Let users view items in their cart
+
+Last but not least, users should be able to view ```items```.
+
+1. Open <walkthrough-editor-open-file filePath="./rules-tutorial/quickstart-nodejs/cs-walkthrough/rules-examples/firestore.rules_template_5">firestore.rules_template_5</walkthrough-editor-open-file>. 
+
+2. Now **review** and **edit** the template to add new rule statements:
+
+* Edit <walkthrough-editor-select-line filePath="./rules-tutorial/quickstart-nodejs/cs-walkthrough/rules-examples/firestore.rules_template_5" startLine=16 startCharacterOffset=0 endLine=17 endCharacterOffset=0>here</walkthrough-editor-select-line>.
+
+3. **Copy** the modified and **saved** firestore.rules_template_5 file to update ```firestore.rules```.
+```bash
+cp ~/rules-tutorial/quickstart-nodejs/cs-walkthrough/rules-examples/firestore.rules_template_5 \
+   ~/rules-tutorial/quickstart-nodejs/cs-walkthrough/firestore.rules
+```
+
+4.  Run the tests again.
+```bash
+npm --prefix=functions test
+```
+Fantastic! 4 security test cases, 4 passing tests!
+
+With the Local Emulator Suite and Firebase Test SDK, right in Cloud Shell with pre-installed tools, we've been able to prototype a set of Security Rules and test their performance without touching production code.
+
+
+## What next?
+
+OK, so we've:
+
++   Created a Firestore database using Firebase Local Emulator Suite, populated this database, and used it for live Security Rules evaluations.
++   Worked with a .rules file and a few predefined test cases using Firebase Test SDK to spot buggy Security Rules and quickly iterate fixes
+
+At this point, we recommend you:
+
++   Learn more about Firebase Local Emulator Suite, including how to install and include it in your continuous integration environment, as well as how to use it for mobile app prototyping and testing. These topics [are covered in the documentation](https://firebase.google.com/docs/emulator-suite).
++   Compare this experience of debugging Security Rules with the Emulator Suite to the experience of Rules debugging in the Security Rules Simulator. Each tool has its value. You can find the Simulator in the [Rules tab in Firebase console](https://firebase.corp.google.com/project/_/database/firestore/rules).
+
+**The Firebase console is likely still open in your browser. To complete this walkthrough and close Cloud Shell, simply close this browser tab.**
+
+Remember, you can always return to Cloud Shell to check out and prototype your Firebase Security Rules and other project files and data.
diff --git a/auth-sessions/.gitignore b/auth-sessions/.gitignore
deleted file mode 100644
index 580c6d9a..00000000
--- a/auth-sessions/.gitignore
+++ /dev/null
@@ -1,15 +0,0 @@
-# Node modules.
-node_modules/
-
-# Generated files.
-*.log
-*.pyc
-.DS_Store
-*~
-*.swp
-public/bundle.js
-
-# Local config.
-**/.firebaserc
-serviceAccountKeys.json
-config.js
diff --git a/auth-sessions/README.md b/auth-sessions/README.md
deleted file mode 100644
index 7f9e05be..00000000
--- a/auth-sessions/README.md
+++ /dev/null
@@ -1,74 +0,0 @@
-# Firebase Admin Node.js Session Management Quickstart
-
-This sample app demonstrates how to use Firebase `httpOnly` session cookies
-with the Firebase Admin SDK session management API.
-
-## Table of Contents
-
-1. [Developer Setup](#developer-setup)
-
-## Developer Setup
-
-### Dependencies
-
-To set up a development environment to build the sample from source, you must
-have the following installed:
-- Node.js (>= 6.0.0)
-- npm (should be included with Node.js)
-
-Download the sample application source and its dependencies with:
-
-```bash
-git clone https://github.com/firebase/quickstart-nodejs
-cd quickstart-nodejs/auth-sessions
-npm install
-```
-
-### Configuring the app
-
-Create your project in the [Firebase
-Console](https://console.firebase.google.com).
-
-[Add Firebase to your app](https://firebase.google.com/docs/web/setup).
-
-Enable the **Google** and **Email/Password** sign-in providers in the
-**Authentication > SIGN-IN METHOD** tab.
-
-In the root folder `./auth-sessions`, create a `config.js` file:
-
-```javascript
-var config = {
-  apiKey: "...",
-  authDomain: "...",
-  databaseURL: "...",
-  storageBucket: "...",
-  messagingSenderId: "..."
-};
-module.exports = config;
-```
-Copy and paste the Web snippet code configuration found in the console to the `config.js` file.
-You can find the snippet by clicking the "Web setup" button in the Firebase Console
-Authentication page.
-
-Ensure the application authorized domain is also whitelisted. `localhost` should already be set
-as an authorized OAuth domain.
-
-Since the application is using the Firebase Admin SDK, service account credentials will be
-required. Learn more on how to [add the Firebase Admin SDK to your
-server](https://firebase.google.com/docs/admin/setup).
-
-After you generate a new private key, save it in the root folder `./auth-sessions` as
-`serviceAccountKeys.json`.
-Make sure to keep these credentials secret and never expose them in public.
-
-### Building Sample app
-
-To build and run the sample app, run:
-```bash
-npm run demo
-```
-
-This will launch a local server using port 3000.
-To access the app, go to [http://localhost:3000/](http://localhost:3000)
-
-
diff --git a/auth-sessions/app.js b/auth-sessions/app.js
deleted file mode 100644
index 0e654b96..00000000
--- a/auth-sessions/app.js
+++ /dev/null
@@ -1,232 +0,0 @@
-/*
- * Copyright 2018 Google Inc. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
- * in compliance with the License. You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software distributed under the
- * License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
- * express or implied. See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-var express = require('express');
-var cookieParser = require('cookie-parser')
-var http = require('http');
-var https = require('https');
-var app = express();
-var admin = require('firebase-admin');
-var bodyParser = require('body-parser');
-
-/**
- * Renders the profile page and serves it in the response.
- * @param {string} endpoint The get profile endpoint.
- * @param {!Object} req The expressjs request.
- * @param {!Object} res The expressjs response.
- * @param {!firebase.auth.DecodedIdToken} decodedClaims The decoded claims from verified
- *     session cookies.
- * @return {!Promise} A promise that resolves on success.
- */
-function serveContentForUser(endpoint, req, res, decodedClaims) {
-  // Lookup the user information corresponding to cookie and return the profile data for the user.
-  return admin.auth().getUser(decodedClaims.sub).then(function(userRecord) {
-    var html = '<!DOCTYPE html>' +
-      '<html>' +
-      '<meta charset="UTF-8">' +
-      '<link href="style.css" rel="stylesheet" type="text/css" media="screen" />' +
-      '<meta name="viewport" content="width=device-width, initial-scale=1">' +
-      '<title>Sample Profile Page</title>' +
-      '<body>' +
-      '<div id="container">' +
-      '  <h3>Welcome to Session Management Example App, '+( userRecord.displayName || 'N/A') +'</h3>' +
-      '  <div id="loaded">' +
-      '    <div id="main">' +
-      '      <div id="user-signed-in">' +
-      // Show user profile information.
-      '        <div id="user-info">' +
-      '          <div id="photo-container">' +
-      (userRecord.photoURL ? '      <img id="photo" src=' +userRecord.photoURL+ '>' : '') +
-      '          </div>' +
-      '          <div id="name">' + userRecord.displayName + '</div>' +
-      '          <div id="email">'+
-      userRecord.email + ' (' + (userRecord.emailVerified ? 'verified' : 'unverified') + ')</div>' +
-      '          <div class="clearfix"></div>' +
-      '        </div>' +
-      '        <p>' +
-      // Append button for sign out.
-      '          <button id="sign-out" onClick="window.location.assign(\'/logout\')">Sign Out</button>' +
-      // Append button for deletion.
-      '          <button id="delete-account" onClick="window.location.assign(\'/delete\')">' +
-      'Delete account</button>' +
-      '        </p>' +
-      '      </div>' +
-      '    </div>' +
-      '  </div>' +
-      '</div>' +
-      '</body>' +
-      '</html>';
-    res.set('Content-Type', 'text/html');
-    res.end(html);
-  });
-}
-
-/**
- * Attaches a CSRF token to the request.
- * @param {string} url The URL to check.
- * @param {string} cookie The CSRF token name.
- * @param {string} value The CSRF token value to save.
- * @return {function} The middleware function to run.
- */
-function attachCsrfToken(url, cookie, value) {
-  return function(req, res, next) {
-    if (req.url == url) {
-      res.cookie(cookie, value);
-    }
-    next();
-  }
-}
-
-/**
- * Checks if a user is signed in and if so, redirects to profile page.
- * @param {string} url The URL to check if signed in.
- * @return {function} The middleware function to run.
- */
-function checkIfSignedIn(url) {
-  return function(req, res, next) {
-    if (req.url == url) {
-      var sessionCookie = req.cookies.session || '';
-      // User already logged in. Redirect to profile page.
-      admin.auth().verifySessionCookie(sessionCookie).then(function(decodedClaims) {
-        res.redirect('/profile');
-      }).catch(function(error) {
-        next();
-      });
-    } else {
-      next();
-    }
-  }
-}
-
-// Initialize Admin SDK.
-admin.initializeApp({
-  credential: admin.credential.cert('serviceAccountKeys.json')
-});
-// Support JSON-encoded bodies.
-app.use(bodyParser.json());
-// Support URL-encoded bodies.
-app.use(bodyParser.urlencoded({
-  extended: true
-}));
-// Support cookie manipulation.
-app.use(cookieParser());
-// Attach CSRF token on each request.
-app.use(attachCsrfToken('/', 'csrfToken', (Math.random()* 100000000000000000).toString()));
-// If a user is signed in, redirect to profile page.
-app.use(checkIfSignedIn('/',));
-// Serve static content from public folder.
-app.use('/', express.static('public'));
-
-/** Get profile endpoint. */
-app.get('/profile', function (req, res) {
-  // Get session cookie.
-  var sessionCookie = req.cookies.session || '';
-  // Get the session cookie and verify it. In this case, we are verifying if the
-  // Firebase session was revoked, user deleted/disabled, etc.
-  admin.auth().verifySessionCookie(sessionCookie, true /** check if revoked. */)
-    .then(function(decodedClaims) {
-      // Serve content for signed in user.
-      return serveContentForUser('/profile', req, res, decodedClaims);
-    }).catch(function(error) {
-      // Force user to login.
-      res.redirect('/');
-    });
-});
-
-/** Session login endpoint. */
-app.post('/sessionLogin', function (req, res) {
-  // Get ID token and CSRF token.
-  var idToken = req.body.idToken.toString();
-  var csrfToken = req.body.csrfToken.toString();
-  
-  // Guard against CSRF attacks.
-  if (!req.cookies || csrfToken !== req.cookies.csrfToken) {
-    res.status(401).send('UNAUTHORIZED REQUEST!');
-    return;
-  }
-  // Set session expiration to 5 days.
-  var expiresIn = 60 * 60 * 24 * 5 * 1000;
-  // Create the session cookie. This will also verify the ID token in the process.
-  // The session cookie will have the same claims as the ID token.
-  // We could also choose to enforce that the ID token auth_time is recent.
-  admin.auth().verifyIdToken(idToken).then(function(decodedClaims) {
-    // In this case, we are enforcing that the user signed in in the last 5 minutes.
-    if (new Date().getTime() / 1000 - decodedClaims.auth_time < 5 * 60) {
-      return admin.auth().createSessionCookie(idToken, {expiresIn: expiresIn});
-    }
-    throw new Error('UNAUTHORIZED REQUEST!');
-  })
-  .then(function(sessionCookie) {
-    // Note httpOnly cookie will not be accessible from javascript.
-    // secure flag should be set to true in production.
-    var options = {maxAge: expiresIn, httpOnly: true, secure: false /** to test in localhost */};
-    res.cookie('session', sessionCookie, options);
-    res.end(JSON.stringify({status: 'success'}));
-  })
-  .catch(function(error) {
-    res.status(401).send('UNAUTHORIZED REQUEST!');
-  });
-});
-
-/** User signout endpoint. */
-app.get('/logout', function (req, res) {
-  // Clear cookie.
-  var sessionCookie = req.cookies.session || '';
-  res.clearCookie('session');
-  // Revoke session too. Note this will revoke all user sessions.
-  if (sessionCookie) {
-    admin.auth().verifySessionCookie(sessionCookie, true).then(function(decodedClaims) {
-      return admin.auth().revokeRefreshTokens(decodedClaims.sub);
-    })
-    .then(function() {
-      // Redirect to login page on success.
-      res.redirect('/');
-    })
-    .catch(function() {
-      // Redirect to login page on error.
-      res.redirect('/');
-    });
-  } else {
-    // Redirect to login page when no session cookie available.
-    res.redirect('/');
-  }
-});
-
-/** User delete endpoint. */
-app.get('/delete', function (req, res) {
-  var sessionCookie = req.cookies.session || '';
-  res.clearCookie('session');
-  if (sessionCookie) {
-    // Verify user and then delete the user.
-    admin.auth().verifySessionCookie(sessionCookie, true).then(function(decodedClaims) {
-      return admin.auth().deleteUser(decodedClaims.sub);
-    })
-    .then(function() {
-      // Redirect to login page on success.
-      res.redirect('/');
-    })
-    .catch(function() {
-      // Redirect to login page on error.
-      res.redirect('/');
-    });
-  } else {
-    // Redirect to login page when no session cookie available.
-    res.redirect('/');
-  }
-});
-
-// Start http server and listen to port 3000.
-app.listen(3000, function () {
-  console.log('Sample app listening on port 3000!')
-})
diff --git a/auth-sessions/package-lock.json b/auth-sessions/package-lock.json
deleted file mode 100644
index b37cfd8e..00000000
--- a/auth-sessions/package-lock.json
+++ /dev/null
@@ -1,10466 +0,0 @@
-{
-  "name": "firebase-admin-session-mgmt",
-  "version": "1.0.0",
-  "lockfileVersion": 1,
-  "requires": true,
-  "dependencies": {
-    "@firebase/app": {
-      "version": "0.1.10",
-      "resolved": "https://registry.npmjs.org/@firebase/app/-/app-0.1.10.tgz",
-      "integrity": "sha512-2GTXt3b2QZXkmx6/5nNJq+pEN/VTjAG55MFJS1WMoLVZkwKuNpWNk65QVyPaoL88x1iHtuLqAMFgJUOnhOg+Pw==",
-      "requires": {
-        "@firebase/app-types": "0.1.2",
-        "@firebase/util": "0.1.10",
-        "tslib": "1.9.0"
-      }
-    },
-    "@firebase/app-types": {
-      "version": "0.1.2",
-      "resolved": "https://registry.npmjs.org/@firebase/app-types/-/app-types-0.1.2.tgz",
-      "integrity": "sha512-bCIZGeMtP0ibrXNNaU214/1tRNw0jHnir/cfiAao1gjUyIS7RzOTQoH+zbwPJNEwUqJ0T3ykw/Tv4/khGqbVBg=="
-    },
-    "@firebase/auth": {
-      "version": "0.4.0",
-      "resolved": "https://registry.npmjs.org/@firebase/auth/-/auth-0.4.0.tgz",
-      "integrity": "sha512-+ocmny3Ja6WOrucmnu7iwedI0G3AqOMCSwqlC9cMpKPQubQhmOPogTD8GZsY4t/nkBxmcRTUjQWfV7UsNwY4+w==",
-      "requires": {
-        "@firebase/auth-types": "0.2.0"
-      }
-    },
-    "@firebase/auth-types": {
-      "version": "0.2.0",
-      "resolved": "https://registry.npmjs.org/@firebase/auth-types/-/auth-types-0.2.0.tgz",
-      "integrity": "sha512-3Ny3xP0DeeeFz92093PHyloIDSFhzajib0X6BZZkz3hS3c/qt+xvACTKpz1jHrQTQAhNL8fGBvO8LsZHrnDT0Q=="
-    },
-    "@firebase/database": {
-      "version": "0.2.1",
-      "resolved": "https://registry.npmjs.org/@firebase/database/-/database-0.2.1.tgz",
-      "integrity": "sha512-IxONy7MM+Vmnx7bupBujmUyaTqE0n9Jt5xW/2gyLRc9i2wOxNR0XDlJ3Oc12+bksW/zMXHJU1hNO1jxRmIKmsw==",
-      "requires": {
-        "@firebase/database-types": "0.2.0",
-        "@firebase/logger": "0.1.0",
-        "@firebase/util": "0.1.10",
-        "faye-websocket": "0.11.1",
-        "tslib": "1.9.0"
-      }
-    },
-    "@firebase/database-types": {
-      "version": "0.2.0",
-      "resolved": "https://registry.npmjs.org/@firebase/database-types/-/database-types-0.2.0.tgz",
-      "integrity": "sha512-QFrxlLABVbZAVJqw1XNkSYZK22qPjpE3U5eM1SO7Htx69TrIgX7tb1/+BJnFkb3AKUD33tAr22Z4XVth5Ys46A=="
-    },
-    "@firebase/firestore": {
-      "version": "0.3.6",
-      "resolved": "https://registry.npmjs.org/@firebase/firestore/-/firestore-0.3.6.tgz",
-      "integrity": "sha512-omMsncTflPW3Tm6Xbq/4u7lofkttN5yv12RslpQ+ts4BHSeWHan2KYToChup451ViC/8zqmSS8669vOQ5Y3YFg==",
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diff --git a/auth-sessions/package.json b/auth-sessions/package.json
deleted file mode 100644
index 35754b75..00000000
--- a/auth-sessions/package.json
+++ /dev/null
@@ -1,23 +0,0 @@
-{
-  "name": "firebase-admin-session-mgmt",
-  "version": "1.0.0",
-  "description": "Session Management with Firebase Admin SDK Quickstart Sample",
-  "main": "app.js",
-  "scripts": {
-    "test": "echo \"Error: no test specified\" && exit 1",
-    "demo": "./node_modules/.bin/webpack --config webpack.config.js && node app.js"
-  },
-  "author": "bojeil-google",
-  "license": "Apache License Version 2.0",
-  "dependencies": {
-    "body-parser": "^1.15.2",
-    "cookie-parser": "^1.4.3",
-    "express": "^4.14.0",
-    "jquery": "^3.3.1",
-    "firebase-admin": "^5.12.0",
-    "firebase": "^4.8.0",
-    "firebaseui": "^2.6.3",
-    "webpack": "^4.4.1",
-    "webpack-cli": "^2.0.13"
-  }
-}
diff --git a/auth-sessions/public/index.html b/auth-sessions/public/index.html
deleted file mode 100644
index 9e8f6454..00000000
--- a/auth-sessions/public/index.html
+++ /dev/null
@@ -1,14 +0,0 @@
-<html>
-<meta name="viewport" content="width=device-width, initial-scale=1">
-<link href="style.css" rel="stylesheet" type="text/css" media="screen" />
-<link type="text/css" rel="stylesheet" href="https://cdn.firebase.com/libs/firebaseui/2.6.3/firebaseui.css" />
-<script src="bundle.js"></script>
-<body>
-  <div id="container">
-    <h3>Session Management Demo</h3>
-    <div id="loading">Loading...</div>
-    <div id="redirecting" class="hidden">Redirecting...</div>
-    <div id="firebaseui-container"></div>
-  </div>
-</body>
-</html>
diff --git a/auth-sessions/public/style.css b/auth-sessions/public/style.css
deleted file mode 100644
index 787ba218..00000000
--- a/auth-sessions/public/style.css
+++ /dev/null
@@ -1,53 +0,0 @@
-* {
-  box-sizing: border-box;
-}
-
-body {
-  margin: 0;
-}
-
-#container {
-  max-width: 600px;
-  margin: 0 auto;
-  text-align: center;
-}
-
-.clearfix {
-  clear: both;
-}
-
-.hidden {
-  display: none;
-}
-
-#user-info {
-  border: 1px solid #CCC;
-  clear: both;
-  margin: 0 auto 20px;
-  max-width: 400px;
-  padding: 10px;
-  text-align: left;
-}
-
-#photo-container {
-  background-color: #EEE;
-  border: 1px solid #CCC;
-  float: left;
-  height: 80px;
-  margin-right: 10px;
-  width: 80px;
-}
-
-#photo {
-  height: 80px;
-  margin: 0;
-  width: 80px;
-}
-
-@media (max-width: 300px) {
-  #photo-container,
-  #photo {
-    height: 40px;
-    width: 40px;
-  }
-}
diff --git a/auth-sessions/script.js b/auth-sessions/script.js
deleted file mode 100644
index b1c0eeba..00000000
--- a/auth-sessions/script.js
+++ /dev/null
@@ -1,122 +0,0 @@
-/*
- * Copyright 2018 Google Inc. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
- * in compliance with the License. You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software distributed under the
- * License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
- * express or implied. See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-var firebase = require('firebase');
-var firebaseui = require('firebaseui');
-var config = require('./config.js');
-var $ = require('jquery');
-
-/**
- * @param {string} name The cookie name.
- * @return {?string} The corresponding cookie value to lookup.
- */
-function getCookie(name) {
-  var v = document.cookie.match('(^|;) ?' + name + '=([^;]*)(;|$)');
-  return v ? v[2] : null;
-}
-
-/**
- * @return {!Object} The FirebaseUI config.
- */
-function getUiConfig() {
-  // This configuration supports email/password and Google providers.
-  return {
-    'callbacks': {
-      // Called when the user has been successfully signed in.
-      'signInSuccess': function(user, credential, redirectUrl) {
-        // Handle signed in user.
-        handleSignedInUser(user);
-        // Do not automatically redirect.
-        return false;
-      },
-      'uiShown': function() {
-        // Remove progress bar when the UI is ready.
-        document.getElementById('loading').classList.add('hidden');
-      }
-    },
-    'signInFlow': 'popup',
-    'signInOptions': [
-      {
-        provider: firebase.auth.GoogleAuthProvider.PROVIDER_ID
-      },
-      {
-        provider: firebase.auth.EmailAuthProvider.PROVIDER_ID,
-        // Whether the display name should be displayed in Sign Up page.
-        requireDisplayName: true
-      }
-    ],
-    // Terms of service url.
-    'tosUrl': 'https://www.google.com',
-    'credentialHelper': firebaseui.auth.CredentialHelper.NONE
-  };
-}
-
-/**
- * Handles a signed in user. Sets the session cookie and then redirects to
- * profile page on success.
- * @param {!firebase.User} user
- */
-var handleSignedInUser = function(user) {
-  // Show redirection notice.
-  document.getElementById('redirecting').classList.remove('hidden');
-  // Set session cookie
-  user.getIdToken().then(function(idToken) {
-    // Session login endpoint is queried and the session cookie is set.
-    // CSRF token should be sent along with request.
-    var csrfToken = getCookie('csrfToken')
-    return postIdTokenToSessionLogin('/sessionLogin', idToken, csrfToken)
-      .then(function() {
-        // Redirect to profile on success.
-        window.location.assign('/profile');
-      }, function(error) {
-        // Refresh page on error.
-        // In all cases, client side state should be lost due to in-memory
-        // persistence.
-        window.location.assign('/');
-      });
-  });
-};
-
-/**
- * @param {string} url The session login endpoint.
- * @param {string} idToken The ID token to post to backend.
- * @param {?string} csrfToken The CSRF token to send to backend.
- * @return {jQuery.jqXHR<string>} A jQuery promise that resolves on completion.
- */
-var postIdTokenToSessionLogin = function(url, idToken, csrfToken) {
-  // POST to session login endpoint.
-  return $.ajax({
-    type:'POST',
-    url: url,
-    data: {idToken: idToken, csrfToken: csrfToken},
-    contentType: 'application/x-www-form-urlencoded'
-  });
-};
-
-/**
- * Initializes the app.
- */
-var initApp = function() {
-  // Renders sign-in page using FirebaseUI.
-  ui.start('#firebaseui-container', getUiConfig());
-};
-
-// Initialize Firebase app.
-firebase.initializeApp(config);
-// Set persistence to none.
-firebase.auth().setPersistence(firebase.auth.Auth.Persistence.NONE);
-// Initialize the FirebaseUI Widget using Firebase.
-var ui = new firebaseui.auth.AuthUI(firebase.auth());
-// On page ready, initialize app.
-window.addEventListener('load', initApp);
diff --git a/auth-sessions/webpack.config.js b/auth-sessions/webpack.config.js
deleted file mode 100644
index 40e2e35f..00000000
--- a/auth-sessions/webpack.config.js
+++ /dev/null
@@ -1,14 +0,0 @@
-var webpack = require('webpack');
-
-module.exports = {
-  entry: './script.js',
-  mode: 'none',
-  output: {
-    filename: './public/bundle.js',
-    path: __dirname,
-  },
-  optimization: {
-    minimize: true
-  }
-}
-
diff --git a/config/.gitignore b/config/.gitignore
deleted file mode 100644
index 4f46cac7..00000000
--- a/config/.gitignore
+++ /dev/null
@@ -1,3 +0,0 @@
-config.json
-service-account.json
-node_modules
\ No newline at end of file
diff --git a/config/README.md b/config/README.md
deleted file mode 100644
index 72b4a465..00000000
--- a/config/README.md
+++ /dev/null
@@ -1,108 +0,0 @@
-Firebase Remote Config REST API Node.js Quickstart
-===============================================
-
-The [Firebase Remote Config](https://firebase.google.com/docs/remote-config/) Node.js quickstart app 
-demonstrates retrieving and updating the Firebase Remote Config template.
-
-Introduction
-------------
-
-This is a simple example of using the Firebase Remote Config REST API to update
-the Remote Config template being used by clients apps.
-
-Getting started
----------------
-
-1. [Add Firebase to your Android Project](https://firebase.google.com/docs/android/setup).
-2. Create a service account as described in [Adding Firebase to your Server](https://firebase.google.com/docs/admin/setup) and download the JSON file.
-  - Copy the private key JSON file to this folder and rename it to `service-account.json`.
-3. Change the `PROJECT_ID` variable in `index.js` to your project ID.
-
-Run
----
-
-- Get active template
-  - From the `config` directory run `node index.js get` to retrieve the template.
-    - The returned template is stored in a file named `config.json`.
-    - Note the ETag printed to the console you will need to use it when publishing template updates.
-- Update the template
-  - If your template already has parameters, adjust one or more of the values.
-  - If your template is empty, update it to look like this:
-
-        {
-          "conditions": [
-            {
-              "name": "AndroidUsers",
-              "expression": "device.os == 'android'",
-              "tagColor": "PURPLE"
-            },
-            {
-              "name": "iOSUsers",
-              "expression": "device.os == 'ios'",
-              "tagColor": "GREEN"
-            }
-          ],
-          "parameters": {
-            "welcome_message": {
-              "defaultValue": {
-                "value": "Welcome"
-              },
-              "conditionalValues": {
-                "AndroidUsers": {
-                  "value": "Welcome Android User"
-                },
-                "iOSUsers": {
-                  "value": "Welcome iOS User"
-                }
-              }
-            }
-          }
-        }
-
-  - From the `config` directory run `node index.js publish <LATEST_ETAG>` to update the template.
-    - Be sure to set the etag to the one that was last printed in the console.
-  - Confirm in the console that the template has been updated.
-    - At this point mobile clients can fetch the updated values.
-- View existing versions
-  - From the `config` directory run `node index.js versions` to print the metadata of the
-    last 5 template versions.
-- Roll back to an existing template
-  - From the `config` directory run `node index.js rollback <TEMPLATE_VERSION_NUMBER>` to
-    activate the template with the matching version number.
-
-Best practices
---------------
-
-This section provides some additional information about how the Remote Config
-REST API should be used when retrieving and updating templates.
-
-### [Versions](https://firebase.google.com/docs/remote-config/templates) ###
-
-Each time you update parameters, {{remote_config}} creates a
-new versioned {{remote_config}} template and stores the previous template as
-a version that you can retrieve or roll back to as needed.
-
-All non-active versions expire and are removed if they are older than 90 days or if
-there are more than 300 newer template versions. Since template versions expire, any
-versions that need to be retrieved later on should be persisted externally.
-
-Use the `listVersions` [query parameters](https://firebase.google.com/docs/reference/remote-config/rest/v1/projects.remoteConfig/listVersions#query-parameters)
-to filter the versions that are returned.
-
-### ETags ###
-
-Each time the Remote Config template it retrieved an ETag is included. This ETag is a
-unique identifier of the current template on the server. When submitting updates
-to the template you must include the latest ETag to ensure that your updates are consistent.
-
-In the event that you want to completely overwrite the server's template use
-an ETag of "\*". Use this with caution since this operation cannot be undone.
-
-**NOTE:** To get the ETag your request must accept the gzip encoding. Add the header
-`Accept-Encoding: gzip` to receive the ETag in the response header `ETag`.
-
-Support
--------
-
-- [Stack Overflow](https://stackoverflow.com/questions/tagged/firebase-remote-config)
-- [Firebase Support](https://firebase.google.com/support/)
diff --git a/config/index.js b/config/index.js
deleted file mode 100644
index b626dfc6..00000000
--- a/config/index.js
+++ /dev/null
@@ -1,178 +0,0 @@
-var rp = require('request-promise');
-var fs = require('fs');
-var google = require('googleapis');
-
-var PROJECT_ID = 'PROJECT_ID';
-var HOST = 'https://firebaseremoteconfig.googleapis.com';
-var PATH = '/v1/projects/' + PROJECT_ID + '/remoteConfig';
-var SCOPES = ['https://www.googleapis.com/auth/firebase.remoteconfig'];
-
-/**
- * Get a valid access token.
- */
-// [START retrieve_access_token]
-function getAccessToken() {
-  return new Promise(function(resolve, reject) {
-    var key = require('./service-account.json');
-    var jwtClient = new google.auth.JWT(
-      key.client_email,
-      null,
-      key.private_key,
-      SCOPES,
-      null
-    );
-    jwtClient.authorize(function(err, tokens) {
-      if (err) {
-        reject(err);
-        return;
-      }
-      resolve(tokens.access_token);
-    });
-  });
-}
-// [END retrieve_access_token]
-
-/**
- * Retrieve the current Firebase Remote Config template from the server. Once
- * retrieved the template is stored locally in a file named `config.json`.
- */
-function getTemplate() {
-  getAccessToken().then(function(accessToken) {
-    var options = {
-      uri: HOST + PATH,
-      method: 'GET',
-      gzip: true,
-      resolveWithFullResponse: true,
-      headers: {
-        'Authorization': 'Bearer ' + accessToken,
-        'Accept-Encoding': 'gzip',
-      }
-    };
-
-    rp(options)
-        .then(function(resp) {
-          fs.writeFileSync('config.json', resp.body);
-          console.log('Retrieved template has been written to file config.json');
-          console.log('ETag from server: ' + resp.headers['etag']);
-        })
-        .catch(function(err) {
-          console.error('Unable to get template');
-          console.error(err);
-        });
-  });
-}
-
-/**
- * Print the last 5 available Firebase Remote Config template metadata from the server.
- */
-function listVersions() {
-  getAccessToken().then(function(accessToken) {
-    const options = {
-      uri: HOST + PATH + ':listVersions?pageSize=5',
-      method: 'GET',
-      resolveWithFullResponse: true,
-      headers: {
-        'Authorization': 'Bearer ' + accessToken,
-      },
-    };
-
-    rp(options)
-        .then(function(resp) {
-          console.log('Versions:');
-          console.log(resp.body);
-        })
-        .catch(function(err) {
-          console.error('Unable to list versions');
-          console.error(err);
-        });
-  });
-}
-
-/**
- * Roll back to an available version of Firebase Remote Config template.
- *
- * @param version Version of the template to roll back to.
- */
-function rollback(version) {
-  getAccessToken().then(function(accessToken) {
-    const options = {
-      uri: HOST + PATH + ':rollback',
-      method: 'POST',
-      gzip: true,
-      json: true,
-      resolveWithFullResponse: true,
-      headers: {
-        'Authorization': 'Bearer ' + accessToken,
-        'Content-Type': 'application/json; UTF-8',
-        'Accept-Encoding': 'gzip',
-      },
-      body: {
-        version_number: version
-      }
-    };
-
-    rp(options)
-        .then(function(resp) {
-          console.log('Rolled back to: ' + version);
-          console.log(resp.body);
-          const newETag = resp.headers['etag'];
-          console.log('ETag from server: ' + newETag);
-        })
-        .catch(function(err) {
-          console.error('Request to roll back to template: ' + version + ' failed.');
-          console.error(err);
-        });
-  });
-}
-
-/**
- * Publish the local template stored in `config.json` to the server.
- *
- * @param {String} etag ETag must be supplied when publishing a template. This is to
- *                      avoid race conditions when publishing.
- */
-function publishTemplate(etag) {
-  getAccessToken().then(function(accessToken) {
-    var options = {
-      method: 'PUT',
-      uri: HOST + PATH,
-      body: fs.readFileSync('config.json', 'UTF8'),
-      gzip: true,
-      resolveWithFullResponse: true,
-      headers: {
-        'Authorization': 'Bearer ' + accessToken,
-        'Content-Type': 'application/json; UTF-8',
-        'If-Match': etag
-      }
-    };
-    rp(options)
-        .then(function(resp) {
-          var newETag = resp.headers['etag'];
-          console.log('Template has been published');
-          console.log('ETag from server: ' + newETag);
-        })
-        .catch(function(err) {
-          console.error('Unable to publish template.');
-          console.error(err);
-        });
-  });
-}
-
-const action = process.argv[2];
-const etagOrVersion = process.argv[3];
-
-if (action && action === 'get') {
-  getTemplate();
-} else if (action && action === 'publish' && etagOrVersion) {
-  publishTemplate(etagOrVersion);
-} else if (action && action === 'versions') {
-  listVersions();
-} else if (action && action === 'rollback' && etagOrVersion) {
-  rollback(etagOrVersion);
-} else {
-  console.log('Invalid command. Please use one of the following:\n'
-      + 'node index.js get\n'
-      + 'node index.js publish <LATEST_ETAG>\n'
-      + 'node index.js versions\n'
-      + 'node index.js rollback <TEMPLATE_VERSION_NUMBER>');
-}
diff --git a/config/package.json b/config/package.json
deleted file mode 100644
index abe9a6d8..00000000
--- a/config/package.json
+++ /dev/null
@@ -1,8 +0,0 @@
-{
-  "dependencies": {
-    "google-auth-library": "^0.10.0",
-    "googleapis": "^20.1.0",
-    "request-promise": "^4.2.2",
-    "request": "^2.88.0"
-  }
-}
diff --git a/cs-walkthrough/.firebaserc b/cs-walkthrough/.firebaserc
new file mode 100644
index 00000000..811547ab
--- /dev/null
+++ b/cs-walkthrough/.firebaserc
@@ -0,0 +1,5 @@
+{ 
+  "projects": {
+    "default": "marndt-doc-1"
+  }
+}
diff --git a/cs-walkthrough/README.md b/cs-walkthrough/README.md
new file mode 100644
index 00000000..0293bb78
--- /dev/null
+++ b/cs-walkthrough/README.md
@@ -0,0 +1,6 @@
+
+This directory contains files XYZ to support a Firebase Security Rules
+walkthrough for Cloud Shell and the Learn Assistant.
+
+If you need to restart the walkthrough for any reason, at the
+Cloud Shell prompt, run '~/rules-tutorial/quickstart-nodejs/cs-walkthrough/walkthrough.sh'.
diff --git a/cs-walkthrough/WALKTHROUGH.md b/cs-walkthrough/WALKTHROUGH.md
new file mode 100644
index 00000000..2bd55df4
--- /dev/null
+++ b/cs-walkthrough/WALKTHROUGH.md
@@ -0,0 +1,299 @@
+# Test Security Rules with Firebase Emulators and Cloud Shell
+
+## Introduction
+
+Hi Firebase Security Rules developer! Welcome to Google Cloud Shell. We'll explain what this environment is all about shortly, but for now a quick orientation:
+
++   The panel you're reading this text in is called the Learn Assistant.
++   At left, the bottom panel is a full-featured command shell, essentially a Google-hosted virtual machine with this Web interface, called the Google Cloud Shell.
++   At left, a file browser and editor panel let you browse directories in this Cloud Shell instance and edit local files.
+
+You're likely here by way of the Rules interface in Firebase console, interested in learning how you can use offline Firebase emulators to prototype and test Security Rules for your Firebase project.
+
+The news is good. This Cloud Shell instance is already configured with Firebase emulators including Security Rules engine, and a simple testing framework designed with Security Rules development in mind.
+
+To get started with the walkthrough...well, click `Start` below.
+
+## Check out a Security Rules tutorial project
+
+Let's check some tutorial samples out from GitHub and some tools out of npm. 
+
+![Copy to Cloud Shell control](https://firebase.devsite.corp.google.com/docs/rules/images/la_copy_to_shell.png "Copy to Cloud Shell control") -- in the snippets below, use this control to paste commands straight to the Cloud Shell prompt.
+
+1.  Set up a directory structure to organize tutorial project files plus your own project(s).
+
+> Note: As shown below, please create the following directory from the **root** of your Cloud Shell home directory.  
+```bash  
+cd ~; mkdir rules-tutorial  
+```
+
+2.  Switch to the tutorial working directory.
+
+```bash  
+cd ~/rules-tutorial  
+```
+
+3.  Check out the tutorial project from Github.
+
+```bash  
+git clone -b rpb/markarndt https://github.com/firebase/quickstart-nodejs
+```
+
+4.  Change directory to the tutorial project.
+
+```bash  
+cd quickstart-nodejs/cs-walkthrough/
+```
+
+4.  Install the Firebase Test SDK and a few more tools.
+
+```bash  
+npm --prefix=functions install  
+```
+
+## Using the Learn Assistant
+
+OK, setup is done.
+
+This Learn Assistant has some convenient features we'll take advantage of for this walkthrough. Let's try them out.
+
+Note: Be sure you've followed the previous topic and created the home directory structure explained there.
+
+1.  You'll be **opening** a series of Security Rules template files. Click to open <walkthrough-editor-open-file filePath="./rules-tutorial/quickstart-nodejs/cs-walkthrough/rules-examples/firestore.rules_template_0">the first, which is firebase.rules_template_0</walkthrough-editor-open-file>.
+2.  In those template files, you'll **review** descriptions and comments on security rules. Click to select <walkthrough-editor-select-line filePath="./rules-tutorial/quickstart-nodejs/cs-walkthrough/rules-examples/firestore.rules_template_0" startLine=6 startCharacterOffset=0 endLine=7 endCharacterOffset=0>some discussion of a rule definition</walkthrough-editor-select-line>.
+3.  After reviewing rule definitions, you'll **edit** rules and **save the changes** in preparation for re-running the test suite. Click to select <walkthrough-editor-select-line filePath="./rules-tutorial/quickstart-nodejs/cs-walkthrough/rules-examples/firestore.rules_template_0" startLine=7 startCharacterOffset=0 endLine=9 endCharacterOffset=0>code modification instructions</walkthrough-editor-select-line>.
+4.  At the Cloud Shell prompt, you'll **copy the template file to update your main tutorial firestore.rules file**.
+
+```bash   
+cp ~/rules-tutorial/quickstart-nodejs/cs-walkthrough/rules-examples/firestore.rules_template_0 \
+   ~/rules-tutorial/quickstart-nodejs/cs-walkthrough/firestore.rules
+```  
+We'll present most of the walkthrough content and hands-on exercises this way, so repeat the above sequence as many times as you like to get comfortable with this interaction.
+
+## Security Rules basics
+
+You'll get the most out of this walkthrough if you already have some experience with the Firestore Security Rules language and have in your own project modified the default ```firestore.rules``` file with rules tailored to your data. 
+**If you are already familiar with Security Rules basics, you can skip this slide by hitting "Next"**.
+
+Here are the basics about Rules statements. If these concepts are unfamiliar, you might review [Structuring Cloud Firestore Security Rules](https://firebase.google.com/docs/firestore/security/rules-structure).
+
+### Service and database declaration
+Cloud Firestore Security Rules always begin with the following declaration:
+```
+service cloud.firestore {
+  match /databases/{database}/documents {
+    // ...
+  }
+}
+```
+The service cloud.firestore declaration scopes the rules to Cloud Firestore, preventing conflicts between Cloud Firestore Security Rules and rules for other products such as Cloud Storage.
+
+The match /databases/{database}/documents declaration specifies that rules should match any Cloud Firestore database in the project. Currently each project has only a single database named (default).
+
+### Basic read/write rules
+Basic rules consist of a ```match``` statement specifying a document path and an ```allow``` expression detailing when reading the specified data is allowed:
+```
+service cloud.firestore {
+  match /databases/{database}/documents {
+
+    // Match any document in the 'cities' collection
+    match /cities/{city} {
+      allow read: if <condition>;
+      allow write: if <condition>;
+    }
+  }
+}
+```
+All match statements should point to documents, not collections. A match statement can point to a specific document, as in match /cities/SF or use wildcards to point to any document in the specified path, as in match /cities/{city}.
+
+## Emulator Suite and Firebase Test SDK basics
+
+Let's start up the Firestore emulator and run the test suite developed with the Firebase Test SDK.
+
+1.  Start the Firestore and Cloud Functions emulators.
+
+```bash  
+firebase emulators:start --only firestore,functions 
+```
+
+2.  Wait briefly until the Firestore and Cloud Functions emulators have started up. You'll see terminal output saying it's safe to connect.
+3.  Add a <walkthrough-spotlight-pointer cssSelector="#devshell-editor-app;div.p6n-devshell-editor-app-body.layout-row.flex;div.layout-column.flex;pan-dev-shell;div;div.p6n-devshell-header.p6n-action-bar;div:nth-child(6);csh-new-tab-menu;div;button.main.dense.mat-icon-button.mat-button-base;span;mat-icon
+">new Cloud Shell session</walkthrough-spotlight-pointer>. You can do so manually by clicking the + control ("Open a new tab") in the menu above the Cloud Shell terminal window. The emulators keep running in parallel, in our original session.
+4.  At the new session prompt, change directory to our Security Rules walkthrough project.
+
+```bash  
+cd ~/rules-tutorial/quickstart-nodejs/cs-walkthrough/
+```
+
+5.  Run the test suite.
+
+```bash  
+npm --prefix=functions test  
+```  
+Awesome. We're going to peek under the hood next, but the gist is our test suite populated the Firestore emulator with data and made a series of access requests, which were allowed and denied according to our Security Rules, and checked per our test cases.
+
+All of the tests pass, isn't that great? Well, that depends on how secure our app *really* is and just what exactly the tests are confirming. Let's take a look...
+
+## What data are we securing?
+
+Our tests are written with a simple eCommerce app in mind. We have ```users```, and database entries for shopping ```carts```, and ```items``` to put in those carts.
+
+The emulated Firestore database for our tests will be created as we go, populated then deleted at each execution of the test suite, by the Firebase Test SDK.
+
+![Copy to Cloud Shell control](https://firebase.devsite.corp.google.com/docs/rules/images/cs_walkthrough_datamodel.png "eCommerce Data Model for Security Rules Walkthrough")
+
+Note that the data model contains collections (`carts` and `items`) and documents within those collections (`alicesCart` and `lemon`). You can review the [documentation about Firestore hierarchical data models](https://firebase.google.com/docs/firestore/data-model#hierarchical-data).
+
+## Lock down Security Rules
+
+The default ```firestore.rules``` in this walkthrough are set with open security. That is, all operations are permitted on all documents in the database. Our rules tests confirm that operations on the database are permitted, so everything passes.
+
+The Firebase emulators are waiting for more database interactions and Security Rules evaluations, so let's update ```firestore.rules``` to improve security and re-run the tests!
+
+1. Open <walkthrough-editor-open-file filePath="./rules-tutorial/quickstart-nodejs/cs-walkthrough/rules-examples/firestore.rules_template_1">firestore.rules_template_1</walkthrough-editor-open-file>. 
+
+2. **Review** the two rules definitions in this file:
+
+* A definition that applies to all documents in the database, <walkthrough-editor-select-line filePath="./rules-tutorial/quickstart-nodejs/cs-walkthrough/rules-examples/firestore.rules_template_1" startLine=9 startCharacterOffset=0 endLine=14 endCharacterOffset=0>here</walkthrough-editor-select-line>.
+* A definition that applies to items in the items collection, <walkthrough-editor-select-line filePath="./rules-tutorial/quickstart-nodejs/cs-walkthrough/rules-examples/firestore.rules_template_1" startLine=25 startCharacterOffset=0 endLine=31 endCharacterOffset=0>here</walkthrough-editor-select>.
+
+3. Now **edit the rules** to <walkthrough-editor-select-line filePath="./rules-tutorial/quickstart-nodejs/cs-walkthrough/rules-examples/firestore.rules_template_1" startLine=14 startCharacterOffset=0 endLine=23 endCharacterOffset=0>begin tightening security</walkthrough-editor-select-line>.
+
+4. Using your modified and **saved** firestore.rules_template_1 file, **copy/replace to update firestore.rules**.
+
+The emulators automatically detect these `.rules` file changes and load the new rules. 
+
+```bash
+cp ~/rules-tutorial/quickstart-nodejs/cs-walkthrough/rules-examples/firestore.rules_template_1 \
+   ~/rules-tutorial/quickstart-nodejs/cs-walkthrough/firestore.rules
+```
+
+5.  Run the tests again.
+```bash
+npm --prefix=functions test  
+```
+
+We've now fully locked down the data, so we go from 4 test successes to 4 failures. But now that we're secure, we can start to allow database access with appropriate rules.
+
+
+## Let users create shopping carts
+
+First let's look at at letting users create carts in a secure way.
+
+1. Open <walkthrough-editor-open-file filePath="./rules-tutorial/quickstart-nodejs/cs-walkthrough/rules-examples/firestore.rules_template_2">firestore.rules_template_2</walkthrough-editor-open-file>. 
+
+2. **Review** and **edit** the ```match``` statement controlling access to ```cart``` documents:
+
+* Review the ```match``` statement <walkthrough-editor-select-line filePath="./rules-tutorial/quickstart-nodejs/cs-walkthrough/rules-examples/firestore.rules_template_2" startLine=10 startCharacterOffset=0 endLine=14 endCharacterOffset=0>here</walkthrough-editor-select-line>.
+
+* Edit the ```match``` statement <walkthrough-editor-select-line filePath="./rules-tutorial/quickstart-nodejs/cs-walkthrough/rules-examples/firestore.rules_template_2" startLine=14 startCharacterOffset=0 endLine=18 endCharacterOffset=0>here</walkthrough-editor-select-line>.
+
+3. Now **review** and **edit** the ```allow``` statement to narrow down who can interact with selected ```cart``` documents:
+
+* Review the notes about the current and proposed ```allow``` statement <walkthrough-editor-select-line filePath="./rules-tutorial/quickstart-nodejs/cs-walkthrough/rules-examples/firestore.rules_template_2" startLine=18 startCharacterOffset=0 endLine=20 endCharacterOffset=0>here</walkthrough-editor-select-line>.
+
+* And then edit <walkthrough-editor-select-line filePath="./rules-tutorial/quickstart-nodejs/cs-walkthrough/rules-examples/firestore.rules_template_2" startLine=20 startCharacterOffset=0 endLine=24 endCharacterOffset=0>here</walkthrough-editor-select-line>.
+
+4. **Copy** the modified and **saved** firestore.rules_template_2 file to update ```firestore.rules```.
+```bash
+cp ~/rules-tutorial/quickstart-nodejs/cs-walkthrough/rules-examples/firestore.rules_template_2 \
+   ~/rules-tutorial/quickstart-nodejs/cs-walkthrough/firestore.rules
+```
+
+5.  Run the tests again.
+```bash
+npm --prefix=functions test
+```
+
+Great, 1 test passed, 3 more to go.
+
+## Let users read, update and delete their carts
+
+The next test covers the case of a cart owner having the ability to read, update, or delete their cart.
+
+1. Open <walkthrough-editor-open-file filePath="./rules-tutorial/quickstart-nodejs/cs-walkthrough/rules-examples/firestore.rules_template_3">firestore.rules_template_3</walkthrough-editor-open-file>. 
+
+2. Now **review** and **edit** the template to add to the ```allow``` statement:
+
+* Review the notes about this addition <walkthrough-editor-select-line filePath="./rules-tutorial/quickstart-nodejs/cs-walkthrough/rules-examples/firestore.rules_template_3" startLine=13 startCharacterOffset=0 endLine=21 endCharacterOffset=0>here</walkthrough-editor-select-line>.
+
+* And then edit <walkthrough-editor-select-line filePath="./rules-tutorial/quickstart-nodejs/cs-walkthrough/rules-examples/firestore.rules_template_3" startLine=21 startCharacterOffset=0 endLine=24 endCharacterOffset=0>here</walkthrough-editor-select-line>.
+
+3. **Copy** the modified and **saved** firestore.rules_template_3 file to update ```firestore.rules```.
+```bash
+cp ~/rules-tutorial/quickstart-nodejs/cs-walkthrough/rules-examples/firestore.rules_template_3 \
+   ~/rules-tutorial/quickstart-nodejs/cs-walkthrough/firestore.rules
+```
+
+4.  Run the tests.
+```bash
+npm --prefix=functions test
+```
+
+There we go. Now 2 passing tests.
+
+## Let users put items in their cart
+
+Empty carts are no good. Let's write a new set of ```match``` and ```allow``` statements so users can add items to their carts as as long as they own the cart.
+
+1. Open <walkthrough-editor-open-file filePath="./rules-tutorial/quickstart-nodejs/cs-walkthrough/rules-examples/firestore.rules_template_4">firestore.rules_template_4</walkthrough-editor-open-file>. 
+
+2. Now **review** and **edit** the template to add new rule statements:
+
+* Review the notes about this addition <walkthrough-editor-select-line filePath="./rules-tutorial/quickstart-nodejs/cs-walkthrough/rules-examples/firestore.rules_template_4" startLine=15 startCharacterOffset=0 endLine=24 endCharacterOffset=0>here</walkthrough-editor-select-line>.
+
+* And then edit <walkthrough-editor-select-line filePath="./rules-tutorial/quickstart-nodejs/cs-walkthrough/rules-examples/firestore.rules_template_4" startLine=24 startCharacterOffset=0 endLine=31 endCharacterOffset=0>here</walkthrough-editor-select-line>.
+
+3. **Copy** the modified and **saved** firestore.rules_template_4 file to update ```firestore.rules```.
+```bash
+cp ~/rules-tutorial/quickstart-nodejs/cs-walkthrough/rules-examples/firestore.rules_template_4 \
+   ~/rules-tutorial/quickstart-nodejs/cs-walkthrough/firestore.rules
+```
+
+4.  Run the tests.
+```bash
+npm --prefix=functions test
+```
+
+Almost there. Let's adjust the rules for our final test case.
+
+## Let users view items in their cart
+
+Last but not least, users should be able to view ```items```.
+
+1. Open <walkthrough-editor-open-file filePath="./rules-tutorial/quickstart-nodejs/cs-walkthrough/rules-examples/firestore.rules_template_5">firestore.rules_template_5</walkthrough-editor-open-file>. 
+
+2. Now **review** and **edit** the template to add new rule statements:
+
+* Edit <walkthrough-editor-select-line filePath="./rules-tutorial/quickstart-nodejs/cs-walkthrough/rules-examples/firestore.rules_template_5" startLine=16 startCharacterOffset=0 endLine=17 endCharacterOffset=0>here</walkthrough-editor-select-line>.
+
+3. **Copy** the modified and **saved** firestore.rules_template_5 file to update ```firestore.rules```.
+```bash
+cp ~/rules-tutorial/quickstart-nodejs/cs-walkthrough/rules-examples/firestore.rules_template_5 \
+   ~/rules-tutorial/quickstart-nodejs/cs-walkthrough/firestore.rules
+```
+
+4.  Run the tests again.
+```bash
+npm --prefix=functions test
+```
+Fantastic! 4 security test cases, 4 passing tests!
+
+With the Local Emulator Suite and Firebase Test SDK, right in Cloud Shell with pre-installed tools, we've been able to prototype a set of Security Rules and test their performance without touching production code.
+
+
+## What next?
+
+OK, so we've:
+
++   Created a Firestore database using Firebase Local Emulator Suite, populated this database, and used it for live Security Rules evaluations.
++   Worked with a .rules file and a few predefined test cases using Firebase Test SDK to spot buggy Security Rules and quickly iterate fixes
+
+At this point, we recommend you:
+
++   Learn more about Firebase Local Emulator Suite, including how to install and include it in your continuous integration environment, as well as how to use it for mobile app prototyping and testing. These topics [are covered in the documentation](https://firebase.google.com/docs/emulator-suite).
++   Compare this experience of debugging Security Rules with the Emulator Suite to the experience of Rules debugging in the Security Rules Simulator. Each tool has its value. You can find the Simulator in the [Rules tab in Firebase console](https://firebase.corp.google.com/project/_/database/firestore/rules).
+
+**The Firebase console is likely still open in your browser. To complete this walkthrough and close Cloud Shell, simply close this browser tab.**
+
+Remember, you can always return to Cloud Shell to check out and prototype your Firebase Security Rules and other project files and data.
diff --git a/cs-walkthrough/firebase.json b/cs-walkthrough/firebase.json
new file mode 100644
index 00000000..90705962
--- /dev/null
+++ b/cs-walkthrough/firebase.json
@@ -0,0 +1,9 @@
+{
+  "firestore": {
+    "rules": "firestore.rules",
+    "indexes": "firestore.indexes.json"
+  },
+  "functions": {
+    
+  }
+}
diff --git a/cs-walkthrough/firestore.indexes.json b/cs-walkthrough/firestore.indexes.json
new file mode 100644
index 00000000..415027e5
--- /dev/null
+++ b/cs-walkthrough/firestore.indexes.json
@@ -0,0 +1,4 @@
+{
+  "indexes": [],
+  "fieldOverrides": []
+}
diff --git a/cs-walkthrough/firestore.rules b/cs-walkthrough/firestore.rules
new file mode 100644
index 00000000..8d4cc8b8
--- /dev/null
+++ b/cs-walkthrough/firestore.rules
@@ -0,0 +1,16 @@
+
+rules_version = '2';
+service cloud.firestore {
+  match /databases/{database}/documents {
+    match /{document=**} {
+      allow read, write: if true;
+      // allow read, write: if false;
+    }
+    // Items available to add to the cart
+    match /items/{itemID} {
+      allow read; // Users can read items
+      // Never do this in production
+      allow create; // Client app creates seed data to create a smooth codelab
+    }
+  }
+}
diff --git a/cs-walkthrough/functions/.eslintrc.json b/cs-walkthrough/functions/.eslintrc.json
new file mode 100644
index 00000000..c0bb5ee4
--- /dev/null
+++ b/cs-walkthrough/functions/.eslintrc.json
@@ -0,0 +1,123 @@
+{
+  "parserOptions": {
+    // Required for certain syntax usages
+    "ecmaVersion": 2017
+  },
+  "plugins": [
+    "promise"
+  ],
+  "extends": "eslint:recommended",
+  "rules": {
+    // Removed rule "disallow the use of console" from recommended eslint rules
+    "no-console": "off",
+
+    // Removed rule "disallow multiple spaces in regular expressions" from recommended eslint rules
+    "no-regex-spaces": "off",
+
+    // Removed rule "disallow the use of debugger" from recommended eslint rules
+    "no-debugger": "off",
+
+    // Removed rule "disallow unused variables" from recommended eslint rules
+    "no-unused-vars": "off",
+
+    // Removed rule "disallow mixed spaces and tabs for indentation" from recommended eslint rules
+    "no-mixed-spaces-and-tabs": "off",
+
+    // Removed rule "disallow the use of undeclared variables unless mentioned in /*global */ comments" from recommended eslint rules
+    "no-undef": "off",
+
+    // Warn against template literal placeholder syntax in regular strings
+    "no-template-curly-in-string": 1,
+
+    // Warn if return statements do not either always or never specify values
+    "consistent-return": 1,
+
+    // Warn if no return statements in callbacks of array methods
+    "array-callback-return": 1,
+
+    // Require the use of === and !==
+    "eqeqeq": 2,
+
+    // Disallow the use of alert, confirm, and prompt
+    "no-alert": 2,
+
+    // Disallow the use of arguments.caller or arguments.callee
+    "no-caller": 2,
+
+    // Disallow null comparisons without type-checking operators
+    "no-eq-null": 2,
+
+    // Disallow the use of eval()
+    "no-eval": 2,
+
+    // Warn against extending native types
+    "no-extend-native": 1,
+
+    // Warn against unnecessary calls to .bind()
+    "no-extra-bind": 1,
+
+    // Warn against unnecessary labels    
+    "no-extra-label": 1,
+
+    // Disallow leading or trailing decimal points in numeric literals
+    "no-floating-decimal": 2,
+
+    // Warn against shorthand type conversions
+    "no-implicit-coercion": 1,
+
+    // Warn against function declarations and expressions inside loop statements
+    "no-loop-func": 1,
+
+    // Disallow new operators with the Function object
+    "no-new-func": 2,
+
+    // Warn against new operators with the String, Number, and Boolean objects
+    "no-new-wrappers": 1,
+
+    // Disallow throwing literals as exceptions
+    "no-throw-literal": 2,
+
+    // Require using Error objects as Promise rejection reasons
+    "prefer-promise-reject-errors": 2,
+
+    // Enforce “for” loop update clause moving the counter in the right direction
+    "for-direction": 2,
+
+    // Enforce return statements in getters
+    "getter-return": 2,
+
+    // Disallow await inside of loops
+    "no-await-in-loop": 0,
+
+    // Disallow comparing against -0
+    "no-compare-neg-zero": 2,
+
+    // Warn against catch clause parameters from shadowing variables in the outer scope
+    "no-catch-shadow": 1,
+
+    // Disallow identifiers from shadowing restricted names
+    "no-shadow-restricted-names": 2,
+
+    // Enforce return statements in callbacks of array methods
+    "callback-return": 2,
+
+    // Require error handling in callbacks
+    "handle-callback-err": 2,
+
+    // Warn against string concatenation with __dirname and __filename
+    "no-path-concat": 1,
+
+    // Prefer using arrow functions for callbacks
+    "prefer-arrow-callback": 1,
+
+    // Return inside each then() to create readable and reusable Promise chains.
+    // Forces developers to return console logs and http calls in promises. 
+    "promise/always-return": 2,
+
+    //Enforces the use of catch() on un-returned promises
+    "promise/catch-or-return": 2,
+
+    // Warn against nested then() or catch() statements
+    "promise/no-nesting": 1
+  }
+}
diff --git a/cs-walkthrough/functions/.gitignore b/cs-walkthrough/functions/.gitignore
new file mode 100644
index 00000000..40b878db
--- /dev/null
+++ b/cs-walkthrough/functions/.gitignore
@@ -0,0 +1 @@
+node_modules/
\ No newline at end of file
diff --git a/cs-walkthrough/functions/index.js b/cs-walkthrough/functions/index.js
new file mode 100644
index 00000000..8dc268f9
--- /dev/null
+++ b/cs-walkthrough/functions/index.js
@@ -0,0 +1,36 @@
+// Copyright 2019 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+const admin = require('firebase-admin');
+const functions = require('firebase-functions');
+const db = admin.initializeApp().firestore();
+
+// Recalculates the total cost of a cart; triggered when there's a change
+// to any items in a cart.
+exports.calculateCart = functions
+    .firestore.document("carts/{cartId}/items/{itemId}")
+    .onWrite(async (change, context) => {
+      let totalPrice = 125.98;
+      let itemCount = 8;
+      try {
+
+        const cartRef = db.collection("carts").doc(context.params.cartId);
+
+        return cartRef.update({
+          totalPrice,
+          itemCount
+        });
+      } catch(err) {
+      }
+    });
diff --git a/cs-walkthrough/functions/package-lock.json b/cs-walkthrough/functions/package-lock.json
new file mode 100644
index 00000000..2e487117
--- /dev/null
+++ b/cs-walkthrough/functions/package-lock.json
@@ -0,0 +1,5674 @@
+{
+  "name": "functions",
+  "requires": true,
+  "lockfileVersion": 1,
+  "dependencies": {
+    "@babel/code-frame": {
+      "version": "7.5.5",
+      "resolved": "https://registry.npmjs.org/@babel/code-frame/-/code-frame-7.5.5.tgz",
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+      "dev": true,
+      "requires": {
+        "@babel/highlight": "^7.0.0"
+      }
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+        "esutils": "^2.0.2",
+        "js-tokens": "^4.0.0"
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+    "@firebase/app": {
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+      "resolved": "https://registry.npmjs.org/@firebase/app/-/app-0.4.14.tgz",
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+        "xmlhttprequest": "1.8.0"
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+        },
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+          "resolved": "https://registry.npmjs.org/@firebase/util/-/util-0.2.25.tgz",
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+          "dev": true,
+          "requires": {
+            "tslib": "1.10.0"
+          }
+        }
+      }
+    },
+    "@firebase/app-types": {
+      "version": "0.6.0",
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+    },
+    "@firebase/auth": {
+      "version": "0.11.8",
+      "resolved": "https://registry.npmjs.org/@firebase/auth/-/auth-0.11.8.tgz",
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+      "dev": true,
+      "requires": {
+        "@firebase/auth-types": "0.7.2"
+      }
+    },
+    "@firebase/auth-interop-types": {
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+    },
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+      "dev": true
+    },
+    "@firebase/component": {
+      "version": "0.1.9",
+      "resolved": "https://registry.npmjs.org/@firebase/component/-/component-0.1.9.tgz",
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+      "requires": {
+        "@firebase/util": "0.2.44",
+        "tslib": "1.11.1"
+      },
+      "dependencies": {
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+        }
+      }
+    },
+    "@firebase/database": {
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+          "resolved": "https://registry.npmjs.org/y18n/-/y18n-4.0.0.tgz",
+          "integrity": "sha512-r9S/ZyXu/Xu9q1tYlpsLIsa3EeLXXk0VwlxqTcFRfg9EhMW+17kbt9G0NrgCmhGb5vT2hyhJZLfDGx+7+5Uj/w==",
+          "dev": true
+        },
+        "yargs": {
+          "version": "13.3.0",
+          "resolved": "https://registry.npmjs.org/yargs/-/yargs-13.3.0.tgz",
+          "integrity": "sha512-2eehun/8ALW8TLoIl7MVaRUrg+yCnenu8B4kBlRxj3GJGDKU1Og7sMXPNm1BYyM1DOJmTZ4YeN/Nwxv+8XJsUA==",
+          "dev": true,
+          "requires": {
+            "cliui": "^5.0.0",
+            "find-up": "^3.0.0",
+            "get-caller-file": "^2.0.1",
+            "require-directory": "^2.1.1",
+            "require-main-filename": "^2.0.0",
+            "set-blocking": "^2.0.0",
+            "string-width": "^3.0.0",
+            "which-module": "^2.0.0",
+            "y18n": "^4.0.0",
+            "yargs-parser": "^13.1.1"
+          }
+        }
+      }
+    }
+  }
+}
diff --git a/cs-walkthrough/functions/package.json b/cs-walkthrough/functions/package.json
new file mode 100644
index 00000000..eb86d742
--- /dev/null
+++ b/cs-walkthrough/functions/package.json
@@ -0,0 +1,29 @@
+{
+  "name": "functions",
+  "description": "Cloud Functions for Firebase",
+  "scripts": {
+    "lint": "eslint .",
+    "serve": "firebase serve --only functions",
+    "shell": "firebase functions:shell",
+    "start": "npm run shell",
+    "deploy": "firebase deploy --only functions",
+    "logs": "firebase functions:log",
+    "test": "mocha --timeout 5000"
+  },
+  "engines": {
+    "node": "8"
+  },
+  "dependencies": {
+    "file-system": "^2.2.2",
+    "firebase-admin": "^8.10.0",
+    "firebase-functions": "^3.6.0"
+  },
+  "devDependencies": {
+    "@firebase/testing": "^0.11.4",
+    "eslint": "^5.12.0",
+    "eslint-plugin-promise": "^4.0.1",
+    "firebase-functions-test": "^0.1.6",
+    "mocha": "^6.1.4"
+  },
+  "private": true
+}
diff --git a/cs-walkthrough/functions/reporter.js b/cs-walkthrough/functions/reporter.js
new file mode 100644
index 00000000..4a9b5fba
--- /dev/null
+++ b/cs-walkthrough/functions/reporter.js
@@ -0,0 +1,95 @@
+// Copyright 2019 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+const clc = require('cli-color');
+const Mocha = require('mocha');
+
+const {
+  EVENT_RUN_END,
+  EVENT_TEST_FAIL,
+  EVENT_TEST_PASS,
+  EVENT_TEST_PENDING,
+  EVENT_SUITE_BEGIN,
+  EVENT_SUITE_END
+} = Mocha.Runner.constants;
+
+/**
+ * A simple custom Mocha reporter to make test output digestible 
+ * for codelab purposes.
+ */
+class SimpleReporter {
+  constructor(runner) {
+    this._indents = 0;
+    const stats = runner.stats;
+
+    runner
+      .on(EVENT_SUITE_BEGIN, (suite) => {
+        if (suite.total() > 0) {
+          console.log(clc.bold.white(suite.title));
+        }
+        this.increaseIndent();
+      })
+      .on(EVENT_SUITE_END, () => {
+        this.decreaseIndent();
+      })
+      .on(EVENT_TEST_PASS, test => {
+        console.log(`${this.indent()}${clc.bold.green('✓')} ${test.title}`);
+      })
+      .on(EVENT_TEST_PENDING, test => {
+        console.log(`${this.indent()}${clc.bold.blue('?')} ${test.title}`);
+      })
+      .on(EVENT_TEST_FAIL, (test, err) => {
+        console.log(`${this.indent()}${clc.bold.red('✗')} ${test.title}`);
+        this.increaseIndent();
+        console.log(this.indentMultilineString(`${clc.red(err.message.trim())}`));
+        this.decreaseIndent();
+      })
+      .once(EVENT_RUN_END, () => {
+        console.log();
+        if (stats.passes > 0) {
+          console.log(`${clc.bold.green('✓ Passed')}: ${stats.passes}`);
+        }
+        if (stats.pending > 0) {
+          console.log(`${clc.bold.blue('? Pending')}: ${stats.pending}`);
+        }
+        if (stats.failures > 0) {
+          console.log(`${clc.bold.red('✗ Failed')}: ${stats.failures}`);
+        }
+        console.log();
+        console.log(`${clc.bold.yellow('Duration')}: ${stats.duration}ms`)
+      });
+  }
+
+  indent() {
+    return Array(this._indents).join('  ');
+  }
+
+  increaseIndent() {
+    this._indents++;
+  }
+
+  decreaseIndent() {
+    this._indents--;
+  }
+
+  indentMultilineString(msg) {
+    const lines = msg.split('\n');
+    for (let i = 0; i < lines.length; i++) {
+      lines[i] = this.indent() + lines[i];
+    }
+
+    return lines.join('\n');
+  }
+}
+
+module.exports = SimpleReporter;
\ No newline at end of file
diff --git a/cs-walkthrough/functions/test.js b/cs-walkthrough/functions/test.js
new file mode 100755
index 00000000..29a2f998
--- /dev/null
+++ b/cs-walkthrough/functions/test.js
@@ -0,0 +1,138 @@
+// Copyright 2019 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+const fs = require('fs');
+const path = require("path");
+
+const TEST_FIREBASE_PROJECT_ID = "test-firestore-rules-project";
+
+// TODO: Change this to your real Firebase Project ID
+const REAL_FIREBASE_PROJECT_ID = "changeme";
+
+const firebase = require("@firebase/testing");
+
+const seedItems = {
+  "chocolate": 4.99,
+  "coffee beans": 12.99,
+  "milk": 5.99
+};
+
+const aliceAuth = {
+  uid: "alice",
+  email: "alice@example.com"
+};
+
+before(async () => {
+  // Load the content of the "firestore.rules" file into the emulator before running the
+  // test suite. This is necessary because we are using a fake Project ID in the tests,
+  // so the rules "hot reloading" behavior which works in the Web App does not apply here.
+  const rulesContent = fs.readFileSync(path.resolve(__dirname, "../firestore.rules"));
+  await firebase.loadFirestoreRules({
+    projectId: TEST_FIREBASE_PROJECT_ID,
+    rules: rulesContent
+  });
+});
+
+after(() => {
+  firebase.apps().forEach(app => app.delete());
+});
+
+// Unit test the security rules
+describe("shopping carts", () => {
+
+  const db = firebase.initializeTestApp({
+    projectId: TEST_FIREBASE_PROJECT_ID,
+    auth: aliceAuth
+  }).firestore();
+
+  after(() => {
+    // Clear data from the emulator
+    firebase.clearFirestoreData({ projectId: TEST_FIREBASE_PROJECT_ID });
+  });
+
+  it('can be created by the cart owner', async () => {
+    await firebase.assertSucceeds(db.doc("carts/alicesCart").set({
+      ownerUID: "alice",
+      total: 0
+    }));
+  });
+});
+
+describe("shopping carts", async () => {
+  const db = firebase.initializeTestApp({
+    projectId: TEST_FIREBASE_PROJECT_ID,
+    auth: aliceAuth
+  }).firestore();
+
+  before(async () => {
+    const admin = firebase.initializeAdminApp({
+      projectId: TEST_FIREBASE_PROJECT_ID
+    }).firestore();
+
+    // Create Alice's cart
+    await admin.doc("carts/alicesCart").set({
+      ownerUID: "alice",
+      total: 0
+    });
+  });
+
+  after(() => {
+    // Clear data from the emulator
+    firebase.clearFirestoreData({ projectId: TEST_FIREBASE_PROJECT_ID });
+  });
+
+  it("can be read, updated, and deleted by the cart owner", async () => {
+    await firebase.assertSucceeds(db.doc("carts/alicesCart").get());
+  });
+});
+
+describe("shopping cart items", async () => {
+  const db = firebase.initializeTestApp({
+    projectId: TEST_FIREBASE_PROJECT_ID,
+    auth: aliceAuth
+  }).firestore();
+
+  before(async () => {
+    const admin = firebase.initializeAdminApp({
+      projectId: TEST_FIREBASE_PROJECT_ID
+    }).firestore();
+
+    // Create Alice's cart
+    await admin.doc("carts/alicesCart").set({
+      ownerUID: "alice",
+      total: 0
+    });
+
+    // Create Items Subcollection in Alice's Cart
+    const alicesItemsRef = admin.doc("carts/alicesCart").collection("items");
+    for (const name of Object.keys(seedItems)) {
+      await alicesItemsRef.doc(name).set({ value: seedItems[name] });
+    }
+  });
+
+  after(() => {
+    // Clear data from the emulator
+    firebase.clearFirestoreData({ projectId: TEST_FIREBASE_PROJECT_ID });
+  });
+
+  it("can be read by the cart owner", async () => {
+    await firebase.assertSucceeds(db.doc("carts/alicesCart/items/milk").get());
+  });
+
+  it("can be added by the cart owner",  async () => {
+    await firebase.assertSucceeds(db.doc("carts/alicesCart/items/lemon").set({
+      name: "lemon",
+      price: 0.99
+    }));
+  });
+});
diff --git a/cs-walkthrough/functions/test_all.js b/cs-walkthrough/functions/test_all.js
new file mode 100644
index 00000000..00906531
--- /dev/null
+++ b/cs-walkthrough/functions/test_all.js
@@ -0,0 +1,221 @@
+// Copyright 2019 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+const fs = require('fs');
+const path = require("path");
+
+const FIREBASE_PROJECT_ID = "something"
+const TEST_FIREBASE_PROJECT_ID = "test-firestore-rules-project";
+
+const firebase = require("@firebase/testing");
+
+const seedItems = {
+  "chocolate": 4.99,
+  "coffee beans": 12.99,
+  "milk": 5.99
+};
+const newItem = {
+  "strawberries": 6.99
+};
+const aliceAuth = {
+  uid: "alice",
+  email: "alice@example.com"
+};
+
+after(() => {
+  firebase.apps().forEach(app => app.delete());
+});
+
+describe("shopping cart creation", () => {
+  const projectId = "cart-security-tests";
+  const admin = firebase.initializeAdminApp({ projectId}).firestore();
+  const db = firebase.initializeTestApp({
+    projectId: projectId,
+    auth: aliceAuth
+  }).firestore();
+
+  after(() => {
+    firebase.clearFirestoreData({projectId: "emulator-codelab-dev"});
+  });
+
+  it('can be created by the cart owner', async () => {
+    await firebase.assertSucceeds(db.doc("carts/alicesCart").set({
+      ownerUID: "alice",
+      total: 0
+    }));
+  });
+
+  it("cannot be created by user other than the cart owner", async () => {
+    // All requests are being made by Alice; testing that she cannot create
+    // a cart owned by a different user.
+    await firebase.assertFails(db.doc("carts/adamsCart").set({
+      ownerUID: "adam",
+      items: seedItems
+    }));
+  });
+});
+
+describe("shopping cart reads, updates, and deletes", () => {
+  const db = firebase.initializeTestApp({
+    projectId: TEST_FIREBASE_PROJECT_ID,
+    auth: aliceAuth
+  }).firestore();
+
+  before(async () => {
+    const admin = firebase.initializeAdminApp({
+      projectId: TEST_FIREBASE_PROJECT_ID
+    }).firestore();
+
+    // Create Alice's cart
+    await admin.doc("carts/alicesCart").set({
+      ownerUID: "alice",
+      total: 0
+    });
+
+    // Create Bart's cart
+    await admin.doc("carts/bartsCart").set({
+      ownerUID: "bart",
+      total: 0
+    });
+  });
+
+  after(() => {
+    firebase.clearFirestoreData({ projectId: TEST_FIREBASE_PROJECT_ID });
+  });
+
+  // Cart reads
+  it("cart can be read by the cart owner", async () => {
+    await firebase.assertSucceeds(db.doc("carts/alicesCart").get());
+  });
+
+  it("cart cannot be read by a user other than the cart owner", async () => {
+    await firebase.assertFails(db.doc("carts/bartsCart").get());
+  });
+
+  // Cart updates
+  it("cart can be updated by the cart owner", async () => {
+    await firebase.assertSucceeds(db.doc("carts/alicesCart").update({
+      arbitraryAttribute: true
+    }));
+  });
+
+  it("cart cannot be updated by a user other than the cart owner", async () => {
+    await firebase.assertSucceeds(db.doc("carts/alicesCart").update({
+      arbitraryAttribute: true
+    }));
+  });
+
+
+  // Cart deletes
+  it("cart can be deleted by the cart owner", async () => {
+    await firebase.assertSucceeds(db.doc("carts/alicesCart").delete());
+  });
+
+  it("cart cannot be deleted by a user other than the cart owner", async () => {
+    await firebase.assertFails(db.doc("carts/bartsCart/items/lemon").delete());
+  });
+
+});
+
+describe("cart items creates, reads, updates, and deletes", () => {
+  const db = firebase.initializeTestApp({
+    projectId: TEST_FIREBASE_PROJECT_ID,
+    auth: aliceAuth
+  }).firestore();
+
+  before(async () => {
+    const admin = firebase.initializeAdminApp({
+      projectId: TEST_FIREBASE_PROJECT_ID
+    }).firestore();
+
+    // Create Alice's cart
+    await admin.doc("carts/alicesCart").set({
+      ownerUID: "alice",
+      total: 0
+    });
+
+    // Create Bart's cart
+    await admin.doc("carts/bartsCart").set({
+      ownerUID: "bart",
+      total: 0
+    });
+
+    // Create Items Subcollection in Alice's Cart
+    const alicesItemsRef = admin.doc("carts/alicesCart").collection("items");
+    Object.keys(seedItems).forEach(name => {
+      alicesItemsRef.doc(name).set({ value: seedItems[name] });
+    });
+
+    // Create Items Subcollection in Bart's Cart
+    const bartsItemsRef = admin.doc("carts/bartsCart").collection("items");
+    Object.keys(seedItems).forEach(name => {
+      bartsItemsRef.doc(name).set({ name: name, value: seedItems[name] });
+    });
+  });
+
+  after(() => {
+    firebase.clearFirestoreData({ projectId: TEST_FIREBASE_PROJECT_ID });
+  });
+
+  // Item creates
+  it('items can be added to a cart by the cart owner', async () => {
+    await firebase.assertSucceeds(db.doc("carts/alicesCart/items/coffee").set({
+      name: "Decaf Coffee Beans",
+      price: 12.99,
+    }));
+  });
+
+  it('items cannot be added to a cart by a user other than the cart owner', async () => {
+    await firebase.assertFails(db.doc("carts/bartsCart/items/coffee").set({
+      name: "Decaf Coffee Beans",
+      price: 12.99,
+    }));
+  });
+
+  // Item reads
+  it("items can be read by the cart owner", async () => {
+    await firebase.assertSucceeds(db.doc("carts/alicesCart/items/milk").get());
+  });
+
+  it("items cannot be read by a user other than the cart owner", async () => {
+    await firebase.assertFails(db.doc("carts/bartsCart/items/milk").get());
+  });
+
+  // Item updates
+  it("items can be updated by the cart owner", async () => {
+    await firebase.assertSucceeds(db.doc("carts/alicesCart/items/lemon").set({
+      name: "lemon",
+      price: .99
+    }));
+  });
+
+  it("items cannot be updated by a user other than the cart owner", async () => {
+    await firebase.assertFails(db.doc("carts/bartsCart/items/lemon").set({
+      name: "lemon",
+      price: .99
+    }));
+  });
+
+  // Item deletes
+  it("items can be deleted by the cart owner", async () => {
+    await firebase.assertSucceeds(
+      db.doc("carts/alicesCart/items/milk").delete()
+    );
+  });
+
+  it("items cannot be deleted by a user other than the cart owner", async () => {
+    await firebase.assertFails(
+      db.doc("carts/bartsCart/items/milk").delete()
+    );
+  });
+});
diff --git a/cs-walkthrough/rules-examples/firestore.rules_template_0 b/cs-walkthrough/rules-examples/firestore.rules_template_0
new file mode 100644
index 00000000..457d7704
--- /dev/null
+++ b/cs-walkthrough/rules-examples/firestore.rules_template_0
@@ -0,0 +1,26 @@
+//********************************************
+// If you need to restart the walkthrough for
+// any reason, at the Cloud Shell prompt
+// run 'cd ~/rules-tutorial/quickstart-nodejs/cs-walkthrough/ ; ./walkthrough.sh; cd -'
+//********************************************
+
+// This file contains a set of Firestore Security Rules.
+// Try editing: DELETE THIS LINE.
+// THEN SAVE THE FILE: FILE > SAVE.
+
+rules_version = '2';
+service cloud.firestore {
+
+  match /databases/{database}/documents {
+    match /{document=**} {
+      allow read, write: if true;
+      // allow read, write: if false;
+    }
+    // Items available to add to the cart
+    match /items/{itemID} {
+      allow read; // Users can read items
+      // Never do this in production
+      allow create; // Client app creates seed data to create a smooth codelab
+    }
+  }
+}
diff --git a/cs-walkthrough/rules-examples/firestore.rules_template_1 b/cs-walkthrough/rules-examples/firestore.rules_template_1
new file mode 100644
index 00000000..6d05182d
--- /dev/null
+++ b/cs-walkthrough/rules-examples/firestore.rules_template_1
@@ -0,0 +1,38 @@
+//********************************************
+// If you need to restart the walkthrough for
+// any reason, at the Cloud Shell prompt
+// run 'cd ~/rules-tutorial/quickstart-nodejs/cs-walkthrough/ ; ./walkthrough.sh; cd -'
+//********************************************
+
+rules_version = '2';
+service cloud.firestore {
+
+  // There are two security rule definitions in this file.
+  // The first uses the glob syntax (document=**) and applies
+  // to all documents in the database.
+  match /databases/{database}/documents {
+    match /{document=**} {
+      // The preceding nested statements match all documents,
+      // so the following 'allow' statement effectively grants all
+      // permissions on all documents to all users. Let's lock down
+      // access by setting the condition in the 'allow' to false.
+      // COMMENT OUT OR DELETE THE FOLLOWING LINE
+      allow read, write: if true;
+      // UNCOMMENT THE FOLLOWING LINE
+      // allow read, write: if false;
+      // FINALLY, SAVE THE FILE: FILE > SAVE.
+    }
+ 
+  // The second rule definition applies to documents in the
+  // items collection.
+  // Note that a rule like this should not be used in production,
+  // but we use it in this walkthrough to let the app generate
+  // the initial set of data. We'll leave these rules alone for
+  // the duration of the walkthrough.   
+  match /items/{itemID} {
+      allow read; // Users can read items
+      // Never do this in production
+      allow create; // Client app creates seed data to create a smooth codelab
+    }
+  }
+}
diff --git a/cs-walkthrough/rules-examples/firestore.rules_template_2 b/cs-walkthrough/rules-examples/firestore.rules_template_2
new file mode 100644
index 00000000..dc37ff38
--- /dev/null
+++ b/cs-walkthrough/rules-examples/firestore.rules_template_2
@@ -0,0 +1,33 @@
+//********************************************
+// If you need to restart the walkthrough for
+// any reason, at the Cloud Shell prompt
+// run 'cd ~/rules-tutorial/quickstart-nodejs/cs-walkthrough/ ; ./walkthrough.sh; cd -'
+//********************************************
+
+rules_version = '2';
+service cloud.firestore {
+
+  match /databases/{database}/documents {
+    // We want these rules to ensure that a shopping cart
+    // can only be created by the shopping cart owner.
+    // Let's start the improvement by restricting
+    // matches to 'cart' documents in the 'carts' collection.
+    // DELETE OR COMMENT OUT THE FOLLOWING LINE.
+    match /{document=**} {
+    // UNCOMMENT THE FOLLOWING LINE.
+    // match /carts/{cartID} {
+    // With carts matched, now allow reads and writes when
+    // the requester's ID matches the ownerID of the data.
+    // DELETE OR COMMENT OUT
+      allow read, write: if false;
+    // UNCOMMENT THE FOLLOWING LINE.
+    //  allow create: if request.auth.uid == request.resource.data.ownerUID;
+    }
+ 
+  match /items/{itemID} {
+      allow read; // Users can read items
+      // Never do this in production
+      allow create;
+    }
+  }
+}
diff --git a/cs-walkthrough/rules-examples/firestore.rules_template_3 b/cs-walkthrough/rules-examples/firestore.rules_template_3
new file mode 100644
index 00000000..19a7b844
--- /dev/null
+++ b/cs-walkthrough/rules-examples/firestore.rules_template_3
@@ -0,0 +1,33 @@
+//********************************************
+// If you need to restart the walkthrough for
+// any reason, at the Cloud Shell prompt
+// run 'cd ~/rules-tutorial/quickstart-nodejs/cs-walkthrough/ ; ./walkthrough.sh; cd -'
+//********************************************
+
+rules_version = '2';
+service cloud.firestore {
+
+  match /databases/{database}/documents {
+    match /carts/{cartID} {
+      allow create: if request.auth.uid == request.resource.data.ownerUID;
+
+      // Now we want the cart owner to be able to read, update, or delete
+      // their cart. Again, we'll base the allow action on a match between 
+      // the requester's ID and the data's owner ID.
+      //
+      // This time, however, our 'if' condition compares
+      // the requester's ID to an existing Firestore resource with
+      // '== resource.data.ownerUID' rather than 'request.resource.data.ownerUID'.
+      //
+      // UNCOMMENT THE FOLLOWING LINE.
+      // allow read, update, delete: if request.auth.uid == resource.data.ownerUID;
+      // THEN SAVE THE FILE: FILE > SAVE.
+    }
+ 
+  match /items/{itemID} {
+      allow read; // Users can read items
+      // Never do this in production
+      allow create;
+    }
+  }
+}
diff --git a/cs-walkthrough/rules-examples/firestore.rules_template_4 b/cs-walkthrough/rules-examples/firestore.rules_template_4
new file mode 100644
index 00000000..6c0a4ead
--- /dev/null
+++ b/cs-walkthrough/rules-examples/firestore.rules_template_4
@@ -0,0 +1,39 @@
+//********************************************
+// If you need to restart the walkthrough for
+// any reason, at the Cloud Shell prompt
+// run 'cd ~/rules-tutorial/quickstart-nodejs/cs-walkthrough/ ; ./walkthrough.sh; cd -'
+//********************************************
+
+rules_version = '2';
+service cloud.firestore {
+
+  match /databases/{database}/documents {
+    match /carts/{cartID} {
+      allow create: if request.auth.uid == request.resource.data.ownerUID;
+      allow read, update, delete: if request.auth.uid == resource.data.ownerUID;
+    }
+ 
+  // Let's talk about adding 'item' documents to a cart. We can write a rule that
+  // allows writing an 'item' if the current user has the same UID as the ownerUID
+  // on the 'cart' document.
+  //
+  // Here our 'match' statement applies to documents in the 'items' collection,
+  // but we need data from the 'carts' collection to define security. That's where
+  // the 'get' operation in the conditional comes in. Use 'get' to access documents
+  // outside the 'match' path you're working in. Here we use it to get the
+  // the ownerUID on the 'cart' document.
+  // UNCOMMENT THE FOLLOWING LINES.
+  // match /carts/{cartID}/items/{itemID} {
+  //   allow write: if 
+  //      get(/databases/$(database)/documents/carts/$(cartID))
+  //      .data.ownerUID == request.auth.uid;
+  // }
+  // AND SAVE THE FILE: FILE > SAVE.
+ 
+  match /items/{itemID} {
+      allow read; // Users can read items
+      // Never do this in production
+      allow create;
+    }
+  }
+}
diff --git a/cs-walkthrough/rules-examples/firestore.rules_template_5 b/cs-walkthrough/rules-examples/firestore.rules_template_5
new file mode 100644
index 00000000..d7ea1c8a
--- /dev/null
+++ b/cs-walkthrough/rules-examples/firestore.rules_template_5
@@ -0,0 +1,29 @@
+//********************************************
+// If you need to restart the walkthrough for
+// any reason, at the Cloud Shell prompt
+// run 'cd ~/rules-tutorial/quickstart-nodejs/cs-walkthrough/ ; ./walkthrough.sh; cd -'
+//********************************************
+
+rules_version = '2';
+service cloud.firestore {
+
+  match /databases/{database}/documents {
+    match /carts/{cartID} {
+      allow create: if request.auth.uid == request.resource.data.ownerUID;
+      allow read, update, delete: if request.auth.uid == resource.data.ownerUID;
+    }
+ 
+  match /carts/{cartID}/items/{itemID} {
+    // ADD THE 'read' OPERATION TO THE FOLLOWING LINE.
+    allow write: if // that is, 'allow read, write: if'
+      get(/databases/$(database)/documents/carts/$(cartID))
+      .data.ownerUID == request.auth.uid;
+    }
+ 
+  match /items/{itemID} {
+      allow read; // Users can read items
+      // Never do this in production
+      allow create;
+    }
+  }
+}
diff --git a/cs-walkthrough/walkthrough.sh b/cs-walkthrough/walkthrough.sh
new file mode 100755
index 00000000..37a459c4
--- /dev/null
+++ b/cs-walkthrough/walkthrough.sh
@@ -0,0 +1,2 @@
+
+cloudshell launch-tutorial ./WALKTHROUGH.md 
diff --git a/database-emulator/javascript-quickstart/.eslintrc b/database-emulator/javascript-quickstart/.eslintrc
deleted file mode 100644
index 703ba3c9..00000000
--- a/database-emulator/javascript-quickstart/.eslintrc
+++ /dev/null
@@ -1,10 +0,0 @@
-{
-    "extends": "google",
-    "parserOptions": {
-        "ecmaVersion": 2017,
-        "sourceType": "module"
-    },
-    "rules": {
-        "max-len": [1, 100, 4]
-    }
-}
diff --git a/database-emulator/javascript-quickstart/README.md b/database-emulator/javascript-quickstart/README.md
deleted file mode 100644
index a29ceb89..00000000
--- a/database-emulator/javascript-quickstart/README.md
+++ /dev/null
@@ -1,45 +0,0 @@
-# Realtime Database emulator quickstart
-
-Let's try writing some simple tests for our security rules.
-
-## Setup
-
-### Install Node dependencies
-
-Run `npm install` from this directory, and make sure that you have a recent
-version of the [Firebase CLI tool](https://github.com/firebase/firebase-tools)
-installed (you'll need `firebase --version` to be at least `6.1.1`).
-
-### Running the emulator
-
-Download the database emulator
-```
-firebase setup:emulators:database
-```
-Start the database emulator (and leave it running during the tests)
-```
-firebase serve --only database
-```
-
-## Running the tests
-
-To run the tests, execute
-```
-npm test
-```
-which runs all the tests in the `tests/` directory.
-
-```
-  profile read rules
-    ✓ should allow anyone to read profiles
-    ✓ should only allow users to modify their own profiles
-
-  room creation
-    ✓ should require the user creating a room to be its owner
-
-  room members
-    ✓ must be added by the room owner
-
-
-  4 passing
-```
diff --git a/database-emulator/javascript-quickstart/database.rules.json b/database-emulator/javascript-quickstart/database.rules.json
deleted file mode 100644
index edcc9f41..00000000
--- a/database-emulator/javascript-quickstart/database.rules.json
+++ /dev/null
@@ -1,30 +0,0 @@
-{
-  "rules": {
-    "users": {
-      "$userId": {
-        ".read": true,
-        ".write": "auth.uid == $userId"
-      }
-    },
-    "rooms": {
-      "$roomId": {
-        ".write": "data.child('owner').val() == auth.uid || !data.exists()",
-        ".validate": "newData.hasChild('owner')",
-        "owner": {
-          ".validate": "newData.isString() && newData.val() == auth.uid"
-        },
-        "members": {
-          "$memberId": {
-            ".write": "!newData.exists() && auth.uid == $memberId"
-          }
-        },
-        "messages": {
-          ".read": "auth != null && data.parent().child('members').child(auth.uid).exists()",
-          "$messageId": {
-            ".write": "auth != null && data.parent().child('members').child(auth.uid).exists()"
-          }
-        }
-      }
-    }
-  }
-}
diff --git a/database-emulator/javascript-quickstart/firebase.json b/database-emulator/javascript-quickstart/firebase.json
deleted file mode 100644
index b6a1b1b3..00000000
--- a/database-emulator/javascript-quickstart/firebase.json
+++ /dev/null
@@ -1,5 +0,0 @@
-{
-  "database": {
-    "rules": "database.rules.json"
-  }
-}
diff --git a/database-emulator/javascript-quickstart/package.json b/database-emulator/javascript-quickstart/package.json
deleted file mode 100644
index 6f8d01c1..00000000
--- a/database-emulator/javascript-quickstart/package.json
+++ /dev/null
@@ -1,15 +0,0 @@
-{
-  "name": "database-emulator-javascript-quickstart",
-  "version": "1.0.1",
-  "description": "Real Time Database emulator testing",
-  "scripts": {
-    "format": "prettier --write **/*.js",
-    "test": "mocha --timeout=10000"
-  },
-  "devDependencies": {
-    "@firebase/testing": "0.10.0",
-    "filesystem": "1.0.1",
-    "mocha": "5.2.0",
-    "prettier": "1.15.2"
-  }
-}
diff --git a/database-emulator/javascript-quickstart/test/test.js b/database-emulator/javascript-quickstart/test/test.js
deleted file mode 100644
index dbaa5ad5..00000000
--- a/database-emulator/javascript-quickstart/test/test.js
+++ /dev/null
@@ -1,138 +0,0 @@
-const firebase = require("@firebase/testing");
-const fs = require("fs");
-
-/*
- * ============
- *    Setup
- * ============
- */
-const databaseName = "database-emulator-example";
-const coverageUrl = `http://localhost:9000/.inspect/coverage?ns=${databaseName}`;
-
-const rules = fs.readFileSync("database.rules.json", "utf8");
-
-/**
- * Creates a new app with authentication data matching the input.
- *
- * @param {object} auth the object to use for authentication (typically {uid: some-uid})
- * @return {object} the app.
- */
-function authedApp(auth) {
-  return firebase.initializeTestApp({ databaseName, auth }).database();
-}
-
-/**
- * Creates a new admin app.
- *
- * @return {object} the app.
- */
-function adminApp() {
-  return firebase.initializeAdminApp({ databaseName }).database();
-}
-
-/*
- * ============
- *  Test Cases
- * ============
- */
-before(async () => {
-  // Set database rules before running these tests
-  await firebase.loadDatabaseRules({
-    databaseName,
-    rules: rules
-  });
-});
-
-beforeEach(async () => {
-  // Clear the database between tests
-  await adminApp()
-    .ref()
-    .set(null);
-});
-
-after(async () => {
-  // Close any open apps
-  await Promise.all(firebase.apps().map(app => app.delete()));
-  console.log(`View rule coverage information at ${coverageUrl}\n`);
-});
-
-describe("profile read rules", () => {
-  it("should allow anyone to read profiles", async () => {
-    const alice = authedApp({ uid: "alice" });
-    const bob = authedApp({ uid: "bob" });
-    const noone = authedApp(null);
-
-    await adminApp()
-      .ref("users/alice")
-      .set({
-        name: "Alice",
-        profilePicture: "http://cool_photos/alice.jpg"
-      });
-
-    await firebase.assertSucceeds(alice.ref("users/alice").once("value"));
-    await firebase.assertSucceeds(bob.ref("users/alice").once("value"));
-    await firebase.assertSucceeds(noone.ref("users/alice").once("value"));
-  });
-
-  it("should only allow users to modify their own profiles", async () => {
-    const alice = authedApp({ uid: "alice" });
-    const bob = authedApp({ uid: "bob" });
-    const noone = authedApp(null);
-
-    await firebase.assertSucceeds(
-      alice.ref("users/alice").update({
-        favorite_color: "blue"
-      })
-    );
-    await firebase.assertFails(
-      bob.ref("users/alice").update({
-        favorite_color: "red"
-      })
-    );
-    await firebase.assertFails(
-      noone.ref("users/alice").update({
-        favorite_color: "orange"
-      })
-    );
-  });
-});
-
-describe("room creation", () => {
-  it("should require the user creating a room to be its owner", async () => {
-    const alice = authedApp({ uid: "alice" });
-
-    // should not be able to create room owned by another user
-    await firebase.assertFails(alice.ref("rooms/room1").set({ owner: "bob" }));
-    // should not be able to create room with no owner
-    await firebase.assertFails(
-      alice.ref("rooms/room1").set({ members: { alice: true } })
-    );
-    // alice should be allowed to create a room she owns
-    await firebase.assertSucceeds(
-      alice.ref("rooms/room1").set({ owner: "alice" })
-    );
-  });
-});
-
-describe("room members", () => {
-  it("must be added by the room owner", async () => {
-    const ownerId = "room_owner";
-    const owner = authedApp({ uid: ownerId });
-    await owner.ref("rooms/room2").set({ owner: ownerId });
-
-    const aliceId = "alice";
-    const alice = authedApp({ uid: aliceId });
-    // alice cannot add random people to a room
-    await firebase.assertFails(
-      alice.ref("rooms/room2/members/rando").set(true)
-    );
-    // alice cannot add herself to a room
-    await firebase.assertFails(
-      alice.ref("rooms/room2/members/alice").set(true)
-    );
-    // the owner can add alice to a room
-    await firebase.assertSucceeds(
-      owner.ref("rooms/room2/members/alice").set(true)
-    );
-  });
-});
diff --git a/database-emulator/typescript-quickstart/.eslintrc b/database-emulator/typescript-quickstart/.eslintrc
deleted file mode 100644
index 98c68efa..00000000
--- a/database-emulator/typescript-quickstart/.eslintrc
+++ /dev/null
@@ -1,10 +0,0 @@
-{
-    "extends": "google",
-    "parser": "typescript-eslint-parser",
-    "parserOptions": {
-        "sourceType": "module"
-    },
-    "rules": {
-        "max-len": [1, 100, 4]
-    }
-}
diff --git a/database-emulator/typescript-quickstart/.gitignore b/database-emulator/typescript-quickstart/.gitignore
deleted file mode 100644
index 4e57eef8..00000000
--- a/database-emulator/typescript-quickstart/.gitignore
+++ /dev/null
@@ -1,2 +0,0 @@
-*.js
-*.js.map
diff --git a/database-emulator/typescript-quickstart/.npmignore b/database-emulator/typescript-quickstart/.npmignore
deleted file mode 100644
index f0e06b3b..00000000
--- a/database-emulator/typescript-quickstart/.npmignore
+++ /dev/null
@@ -1,2 +0,0 @@
-*.ts
-!*.d.ts
diff --git a/database-emulator/typescript-quickstart/README.md b/database-emulator/typescript-quickstart/README.md
deleted file mode 100644
index a29ceb89..00000000
--- a/database-emulator/typescript-quickstart/README.md
+++ /dev/null
@@ -1,45 +0,0 @@
-# Realtime Database emulator quickstart
-
-Let's try writing some simple tests for our security rules.
-
-## Setup
-
-### Install Node dependencies
-
-Run `npm install` from this directory, and make sure that you have a recent
-version of the [Firebase CLI tool](https://github.com/firebase/firebase-tools)
-installed (you'll need `firebase --version` to be at least `6.1.1`).
-
-### Running the emulator
-
-Download the database emulator
-```
-firebase setup:emulators:database
-```
-Start the database emulator (and leave it running during the tests)
-```
-firebase serve --only database
-```
-
-## Running the tests
-
-To run the tests, execute
-```
-npm test
-```
-which runs all the tests in the `tests/` directory.
-
-```
-  profile read rules
-    ✓ should allow anyone to read profiles
-    ✓ should only allow users to modify their own profiles
-
-  room creation
-    ✓ should require the user creating a room to be its owner
-
-  room members
-    ✓ must be added by the room owner
-
-
-  4 passing
-```
diff --git a/database-emulator/typescript-quickstart/database.rules.json b/database-emulator/typescript-quickstart/database.rules.json
deleted file mode 100644
index edcc9f41..00000000
--- a/database-emulator/typescript-quickstart/database.rules.json
+++ /dev/null
@@ -1,30 +0,0 @@
-{
-  "rules": {
-    "users": {
-      "$userId": {
-        ".read": true,
-        ".write": "auth.uid == $userId"
-      }
-    },
-    "rooms": {
-      "$roomId": {
-        ".write": "data.child('owner').val() == auth.uid || !data.exists()",
-        ".validate": "newData.hasChild('owner')",
-        "owner": {
-          ".validate": "newData.isString() && newData.val() == auth.uid"
-        },
-        "members": {
-          "$memberId": {
-            ".write": "!newData.exists() && auth.uid == $memberId"
-          }
-        },
-        "messages": {
-          ".read": "auth != null && data.parent().child('members').child(auth.uid).exists()",
-          "$messageId": {
-            ".write": "auth != null && data.parent().child('members').child(auth.uid).exists()"
-          }
-        }
-      }
-    }
-  }
-}
diff --git a/database-emulator/typescript-quickstart/firebase.json b/database-emulator/typescript-quickstart/firebase.json
deleted file mode 100644
index b6a1b1b3..00000000
--- a/database-emulator/typescript-quickstart/firebase.json
+++ /dev/null
@@ -1,5 +0,0 @@
-{
-  "database": {
-    "rules": "database.rules.json"
-  }
-}
diff --git a/database-emulator/typescript-quickstart/package.json b/database-emulator/typescript-quickstart/package.json
deleted file mode 100644
index c601c750..00000000
--- a/database-emulator/typescript-quickstart/package.json
+++ /dev/null
@@ -1,21 +0,0 @@
-{
-  "name": "database-emulator-javascript-quickstart",
-  "version": "1.0.1",
-  "description": "Real Time Database emulator testing, with TypeScript",
-  "scripts": {
-    "format": "prettier --write **/*.ts",
-    "pretest": "tsc",
-    "test": "mocha --timeout=10000"
-  },
-  "devDependencies": {
-    "@firebase/testing": "0.10.0",
-    "@types/mocha": "5.2.5",
-    "filesystem": "1.0.1",
-    "mocha": "5.2.0",
-    "mocha-typescript": "1.1.17",
-    "prettier": "1.15.2",
-    "source-map-support": "0.5.9",
-    "ts-node": "7.0.1",
-    "typescript": "3.1.3"
-  }
-}
diff --git a/database-emulator/typescript-quickstart/test/mocha.opts b/database-emulator/typescript-quickstart/test/mocha.opts
deleted file mode 100644
index bb4e3905..00000000
--- a/database-emulator/typescript-quickstart/test/mocha.opts
+++ /dev/null
@@ -1,3 +0,0 @@
---ui mocha-typescript
---require source-map-support/register
---recursive test
diff --git a/database-emulator/typescript-quickstart/test/test.ts b/database-emulator/typescript-quickstart/test/test.ts
deleted file mode 100644
index fc8c9edc..00000000
--- a/database-emulator/typescript-quickstart/test/test.ts
+++ /dev/null
@@ -1,146 +0,0 @@
-/// <reference path='../node_modules/mocha-typescript/globals.d.ts' />
-import * as firebase from "@firebase/testing";
-import * as fs from "fs";
-
-/*
- * ============
- *    Setup
- * ============
- */
-const databaseName = "database-emulator-example";
-const coverageUrl = `http://localhost:9000/.inspect/coverage?ns=${databaseName}`;
-
-const rules = fs.readFileSync("database.rules.json", "utf8");
-
-/**
- * Creates a new app with authentication data matching the input.
- *
- * @param {object} auth the object to use for authentication (typically {uid: some-uid})
- * @return {object} the app.
- */
-function authedApp(auth) {
-  return firebase.initializeTestApp({ databaseName, auth }).database();
-}
-
-/**
- * Creates a new admin app.
- *
- * @return {object} the app.
- */
-function adminApp() {
-  return firebase.initializeAdminApp({ databaseName }).database();
-}
-
-/*
- * ============
- *  Test Cases
- * ============
- */
-before(async () => {
-  // Set database rules before running these tests
-  await firebase.loadDatabaseRules({
-    databaseName,
-    rules: rules
-  });
-});
-
-beforeEach(async () => {
-  // Clear the database between tests
-  await adminApp()
-    .ref()
-    .set(null);
-});
-
-after(async () => {
-  // Close any open apps
-  await Promise.all(firebase.apps().map(app => app.delete()));
-  console.log(`View rule coverage information at ${coverageUrl}\n`);
-})
-
-@suite
-class ProfileReadRules {
-  @test
-  async "should allow anyone to read profiles"() {
-    const alice = authedApp({ uid: "alice" });
-    const bob = authedApp({ uid: "bob" });
-    const noone = authedApp(null);
-
-    await adminApp()
-      .ref("users/alice")
-      .set({
-        name: "Alice",
-        profilePicture: "http://cool_photos/alice.jpg"
-      });
-
-    await firebase.assertSucceeds(alice.ref("users/alice").once("value"));
-    await firebase.assertSucceeds(bob.ref("users/alice").once("value"));
-    await firebase.assertSucceeds(noone.ref("users/alice").once("value"));
-  }
-
-  @test
-  async "should only allow users to modify their own profiles"() {
-    const alice = authedApp({ uid: "alice" });
-    const bob = authedApp({ uid: "bob" });
-    const noone = authedApp(null);
-
-    await firebase.assertSucceeds(
-      alice.ref("users/alice").update({
-        favorite_color: "blue"
-      })
-    );
-    await firebase.assertFails(
-      bob.ref("users/alice").update({
-        favorite_color: "red"
-      })
-    );
-    await firebase.assertFails(
-      noone.ref("users/alice").update({
-        favorite_color: "orange"
-      })
-    );
-  }
-}
-
-@suite
-class RoomCreation {
-  @test
-  async "should require the user creating a room to be its owner"() {
-    const alice = authedApp({ uid: "alice" });
-
-    // should not be able to create room owned by another user
-    await firebase.assertFails(alice.ref("rooms/room1").set({ owner: "bob" }));
-    // should not be able to create room with no owner
-    await firebase.assertFails(
-      alice.ref("rooms/room1").set({ members: { alice: true } })
-    );
-    // alice should be allowed to create a room she owns
-    await firebase.assertSucceeds(
-      alice.ref("rooms/room1").set({ owner: "alice" })
-    );
-  }
-}
-
-@suite
-class RoomMembers {
-  @test
-  async "must be added by the room owner"() {
-    const ownerId = "room_owner";
-    const owner = authedApp({ uid: ownerId });
-    await owner.ref("rooms/room2").set({ owner: ownerId });
-
-    const aliceId = "alice";
-    const alice = authedApp({ uid: aliceId });
-    // alice cannot add random people to a room
-    await firebase.assertFails(
-      alice.ref("rooms/room2/members/rando").set(true)
-    );
-    // alice cannot add herself to a room
-    await firebase.assertFails(
-      alice.ref("rooms/room2/members/alice").set(true)
-    );
-    // the owner can add alice to a room
-    await firebase.assertSucceeds(
-      owner.ref("rooms/room2/members/alice").set(true)
-    );
-  }
-}
diff --git a/database-emulator/typescript-quickstart/tsconfig.json b/database-emulator/typescript-quickstart/tsconfig.json
deleted file mode 100644
index b1a0d86f..00000000
--- a/database-emulator/typescript-quickstart/tsconfig.json
+++ /dev/null
@@ -1,9 +0,0 @@
-{
-    "compilerOptions": {
-        "target": "es6",
-        "module": "commonjs",
-        "sourceMap": true,
-        "experimentalDecorators": true,
-        "lib": [ "es6", "dom" ]
-    }
-}
diff --git a/database/README.md b/database/README.md
deleted file mode 100644
index 0094631d..00000000
--- a/database/README.md
+++ /dev/null
@@ -1,35 +0,0 @@
-Firebase Node.js Realtime Database Quickstart
-==========================================
-
-The Node.js Firebase Database quickstart demonstrates how to connect to and use the Firebase Realtime Database using Node.js through a simple social blogging app. It will interoperate with the Web, iOS and Android database quickstarts.
-
-This server will:
- - Update the star counts for all posts.
- - Send email notifications when a post has been starred.
- - Send weekly emails listing top post.
-
-Introduction
-------------
-
-- [Read more about Firebase Database](https://firebase.google.com/docs/database/)
-
-Getting Started
----------------
-
-- Create your project on the [Firebase Console](https://console.firebase.google.com).
-- Create a service account as described in [Adding Firebase to your Server](https://firebase.google.com/docs/server/setup) and drop the file in this directory. Or use the provided test service account.
-- Change the `<PROJECT_ID>` and `<PATH_TO_SERVICE_ACCOUNT_CREDENTIAL_FILE>` placeholders in [`index.js`](index.js).
-- Configure your email transport in [`index.js`](index.js).
-- Run `npm install`.
-- Run `node index.js` to run the Node.js app locally.
-- Configure and run one of the Database quickstarts for [Web](https://github.com/firebase/quickstart-js/tree/master/database), [iOS](https://github.com/firebase/quickstart-ios/tree/master/database) or [Android](https://github.com/firebase/quickstart-android/tree/master/database). Then use one of these apps to publish new posts: you should receive email notifications when one of your posts have received a new star and the starred counter should be kept up to date by the app.
-
-Support
--------
-
-https://firebase.google.com/support/
-
-License
--------
-
-© Google, 2016. Licensed under an [Apache-2](../LICENSE) license.
diff --git a/database/index.js b/database/index.js
deleted file mode 100644
index b97125a3..00000000
--- a/database/index.js
+++ /dev/null
@@ -1,201 +0,0 @@
-/**
- * Copyright 2016 Google Inc. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-'use strict';
-
-// [START imports]
-var firebase = require('firebase-admin');
-// [END imports]
-var nodemailer = require('nodemailer');
-var schedule = require('node-schedule');
-var Promise = require('promise');
-var escape = require('escape-html');
-
-// TODO(DEVELOPER): Configure your email transport.
-// Configure the email transport using the default SMTP transport and a GMail account.
-// See: https://nodemailer.com/
-// For other types of transports (Amazon SES, Sendgrid...) see https://nodemailer.com/2-0-0-beta/setup-transporter/
-var mailTransport = nodemailer.createTransport('smtps://<user>%40gmail.com:<password>@smtp.gmail.com');
-
-// TODO(DEVELOPER): Change the two placeholders below.
-// [START initialize]
-// Initialize the app with a service account, granting admin privileges
-var serviceAccount = require('path/to/serviceAccountKey.json');
-
-firebase.initializeApp({
-  credential: firebase.credential.cert(serviceAccount),
-  databaseURL: 'https://<PROJECT_ID>.firebaseio.com'
-});
-// [END initialize]
-
-/**
- * Send a new star notification email to the user with the given UID.
- */
-// [START single_value_read]
-function sendNotificationToUser(uid, postId) {
-  // Fetch the user's email.
-  var userRef = firebase.database().ref('/users/' + uid);
-  userRef.once('value').then(function(snapshot) {
-    var email = snapshot.val().email;
-    // Send the email to the user.
-    // [START_EXCLUDE]
-    if (email) {
-      sendNotificationEmail(email).then(function() {
-        // Save the date at which we sent that notification.
-        // [START write_fan_out]
-        var update = {};
-        update['/posts/' + postId + '/lastNotificationTimestamp'] =
-            firebase.database.ServerValue.TIMESTAMP;
-        update['/user-posts/' + uid + '/' + postId + '/lastNotificationTimestamp'] =
-            firebase.database.ServerValue.TIMESTAMP;
-        firebase.database().ref().update(update);
-        // [END write_fan_out]
-      });
-    }
-    // [END_EXCLUDE]
-  }).catch(function(error) {
-    console.log('Failed to send notification to user:', error);
-  });
-}
-// [END single_value_read]
-
-
-/**
- * Send the new star notification email to the given email.
- */
-function sendNotificationEmail(email) {
-  var mailOptions = {
-    from: '"Firebase Database Quickstart" <noreply@firebase.com>',
-    to: email,
-    subject: 'New star!',
-    text: 'One of your posts has received a new star!'
-  };
-  return mailTransport.sendMail(mailOptions).then(function() {
-    console.log('New star email notification sent to: ' + email);
-  });
-}
-
-/**
- * Update the star count.
- */
-// [START post_stars_transaction]
-function updateStarCount(postRef) {
-  postRef.transaction(function(post) {
-    if (post) {
-      post.starCount = post.stars ? Object.keys(post.stars).length : 0;
-    }
-    return post;
-  });
-}
-// [END post_stars_transaction]
-
-/**
- * Keep the likes count updated and send email notifications for new likes.
- */
-function startListeners() {
-  firebase.database().ref('/posts').on('child_added', function(postSnapshot) {
-    var postReference = postSnapshot.ref;
-    var uid = postSnapshot.val().uid;
-    var postId = postSnapshot.key;
-    // Update the star count.
-    // [START post_value_event_listener]
-    postReference.child('stars').on('value', function(dataSnapshot) {
-      updateStarCount(postReference);
-      // [START_EXCLUDE]
-      updateStarCount(firebase.database().ref('user-posts/' + uid + '/' + postId));
-      // [END_EXCLUDE]
-    }, function(error) {
-      console.log('Failed to add "value" listener at /posts/' + postId + '/stars node:', error);
-    });
-    // [END post_value_event_listener]
-    // Send email to author when a new star is received.
-    // [START child_event_listener_recycler]
-    postReference.child('stars').on('child_added', function(dataSnapshot) {
-      sendNotificationToUser(uid, postId);
-    }, function(error) {
-      console.log('Failed to add "child_added" listener at /posts/' + postId + '/stars node:', error);
-    });
-    // [END child_event_listener_recycler]
-  });
-  console.log('New star notifier started...');
-  console.log('Likes count updater started...');
-}
-
-/**
- * Send an email listing the top posts every Sunday.
- */
-function startWeeklyTopPostEmailer() {
-  // Run this job every Sunday at 2:30pm.
-  schedule.scheduleJob({hour: 14, minute: 30, dayOfWeek: 0}, function () {
-    // List the top 5 posts.
-    // [START top_posts_query]
-    var topPostsRef = firebase.database().ref('/posts').orderByChild('starCount').limitToLast(5);
-    // [END top_posts_query]
-    var allUserRef = firebase.database().ref('/users');
-    Promise.all([topPostsRef.once('value'), allUserRef.once('value')]).then(function(resp) {
-      var topPosts = resp[0].val();
-      var allUsers = resp[1].val();
-      var emailText = createWeeklyTopPostsEmailHtml(topPosts);
-      sendWeeklyTopPostEmail(allUsers, emailText);
-    }).catch(function(error) {
-      console.log('Failed to start weekly top posts emailer:', error);
-    });
-  });
-  console.log('Weekly top posts emailer started...');
-}
-
-/**
- * Sends the weekly top post email to all users in the given `users` object.
- */
-function sendWeeklyTopPostEmail(users, emailHtml) {
-  Object.keys(users).forEach(function(uid) {
-    var user = users[uid];
-    if (user.email) {
-      var mailOptions = {
-        from: '"Firebase Database Quickstart" <noreply@firebase.com>',
-        to: user.email,
-        subject: 'This week\'s top posts!',
-        html: emailHtml
-      };
-      mailTransport.sendMail(mailOptions).then(function() {
-        console.log('Weekly top posts email sent to: ' + user.email);
-        // Save the date at which we sent the weekly email.
-        // [START basic_write]
-        return firebase.database().child('/users/' + uid + '/lastSentWeeklyTimestamp')
-            .set(firebase.database.ServerValue.TIMESTAMP);
-        // [END basic_write]
-      }).catch(function(error) {
-        console.log('Failed to send weekly top posts email:', error);
-      });
-    }
-  });
-}
-
-/**
- * Creates the text for the weekly top posts email given an Object of top posts.
- */
-function createWeeklyTopPostsEmailHtml(topPosts) {
-  var emailHtml = '<h1>Here are this week\'s top posts:</h1>';
-  Object.keys(topPosts).forEach(function(postId) {
-    var post = topPosts[postId];
-    emailHtml += '<h2>' + escape(post.title) + '</h2><div>Author: ' + escape(post.author) +
-        '</div><div>Stars: ' + escape(post.starCount) + '</div><p>' + escape(post.body) + '</p>';
-  });
-  return emailHtml;
-}
-
-// Start the server.
-startListeners();
-startWeeklyTopPostEmailer();
diff --git a/database/package.json b/database/package.json
deleted file mode 100644
index c6890982..00000000
--- a/database/package.json
+++ /dev/null
@@ -1,15 +0,0 @@
-{
-  "name": "firebase-database-quickstart",
-  "version": "1.0.0",
-  "description": "Firebase Node.js Database Quickstart Sample",
-  "main": "index.js",
-  "author": "nivco@google.com",
-  "license": "Apache License Version 2.0",
-  "dependencies": {
-    "escape-html": "^1.0.3",
-    "firebase-admin": "^4.0.3",
-    "node-schedule": "^1.1.0",
-    "nodemailer": "^2.4.1",
-    "promise": "^7.1.1"
-  }
-}
diff --git a/firestore-emulator/browser-quickstart/.gitignore b/firestore-emulator/browser-quickstart/.gitignore
deleted file mode 100644
index c2658d7d..00000000
--- a/firestore-emulator/browser-quickstart/.gitignore
+++ /dev/null
@@ -1 +0,0 @@
-node_modules/
diff --git a/firestore-emulator/browser-quickstart/README.md b/firestore-emulator/browser-quickstart/README.md
deleted file mode 100644
index 25b90194..00000000
--- a/firestore-emulator/browser-quickstart/README.md
+++ /dev/null
@@ -1,46 +0,0 @@
-# Connecting a web app to the Firestore emulator
-
-Cloud Firestore relies heavily on bi-directional streams. Most clients (such as
-Android, iOS, and Node.js) connect via gRPC. Browser clients unfortunately
-cannot use gRPC bidi streams (see https://github.com/grpc/grpc-web), so Cloud
-Firestore also supports the
-[WebChannel protocol](https://google.github.io/closure-library/api/goog.net.WebChannel.html).
-
-We are in the process of adding WebChannel support to the Firestore emulator.
-It's a little rough at the moment, so please
-[file an issue](https://github.com/firebase/firebase-tools/issues) if you run
-into any bugs.
-
-## Setup
-
-Download the Firestore emulator
-```
-curl -LO https://storage.googleapis.com/firebase-preview-drop/emulator/cloud-firestore-emulator-v1.7.0.jar
-```
-
-Start the Firestore emulator with WebChannel support enabled
-```
-java -jar cloud-firestore-emulator-v1.7.0.jar --webchannel-port=50051 --rules=firestore.rules
-```
-
-Start the Firebase hosting emulator
-```
-firebase serve
-```
-
-## Interacting with the page
-
-Once you've run `firebase serve`, you can visit `http://localhost:5000` in your
-browser and you should see a _very_ barebones chat app powered by the local
-Firestore emulator.
-
-## Running automated tests
-
-Run the test
-```
-npm test
-```
-
-This will create a "headless" instance of Google Chrome, visit the page,
-interact with a few UI elements, and assert that they have the correct
-behavior.
diff --git a/firestore-emulator/browser-quickstart/firebase.json b/firestore-emulator/browser-quickstart/firebase.json
deleted file mode 100644
index 00f5def2..00000000
--- a/firestore-emulator/browser-quickstart/firebase.json
+++ /dev/null
@@ -1,23 +0,0 @@
-{
-  "firestore": {
-    "rules": "firestore.rules",
-    "indexes": "firestore.indexes.json"
-  },
-  "emulators": {
-    "firestore": {}
-  },
-  "hosting": {
-    "public": "public",
-    "ignore": [
-      "firebase.json",
-      "**/.*",
-      "**/node_modules/**"
-    ],
-    "rewrites": [
-      {
-        "source": "**",
-        "destination": "/index.html"
-      }
-    ]
-  }
-}
diff --git a/firestore-emulator/browser-quickstart/firestore.indexes.json b/firestore-emulator/browser-quickstart/firestore.indexes.json
deleted file mode 100644
index 0e3f2d6b..00000000
--- a/firestore-emulator/browser-quickstart/firestore.indexes.json
+++ /dev/null
@@ -1,3 +0,0 @@
-{
-  "indexes": []
-}
diff --git a/firestore-emulator/browser-quickstart/firestore.rules b/firestore-emulator/browser-quickstart/firestore.rules
deleted file mode 100644
index cef3c1a1..00000000
--- a/firestore-emulator/browser-quickstart/firestore.rules
+++ /dev/null
@@ -1,7 +0,0 @@
-service cloud.firestore {
-  match /databases/{database}/documents {
-    match /{doc=**} {
-      allow read, write;
-    }
-  }
-}
diff --git a/firestore-emulator/browser-quickstart/package.json b/firestore-emulator/browser-quickstart/package.json
deleted file mode 100644
index c1311633..00000000
--- a/firestore-emulator/browser-quickstart/package.json
+++ /dev/null
@@ -1,10 +0,0 @@
-{
-  "scripts": {
-    "test": "mocha --exit"
-  },
-  "devDependencies": {
-    "chai": "^4.2.0",
-    "mocha": "^6.2.0",
-    "puppeteer": "^1.19.0"
-  }
-}
diff --git a/firestore-emulator/browser-quickstart/public/index.html b/firestore-emulator/browser-quickstart/public/index.html
deleted file mode 100644
index cf4de788..00000000
--- a/firestore-emulator/browser-quickstart/public/index.html
+++ /dev/null
@@ -1,47 +0,0 @@
-<script src="https://www.gstatic.com/firebasejs/6.3.1/firebase-app.js"></script>
-<script src="https://www.gstatic.com/firebasejs/6.3.1/firebase-firestore.js"></script>
-
-<div id="history"></div>
-<textarea id="input" autofocus></textarea>
-<button id="submit">Submit</button>
-
-<script>
-const dom = {
-  history: document.getElementById("history"),
-  input: document.getElementById("input"),
-  submit: document.getElementById("submit"),
-};
-
-const db = firebase.initializeApp({ projectId: "firestore-emulator-example" }).firestore();
-db.settings({ host: "localhost:50051", ssl: false });
-
-function submit() {
-  db.collection("messages").add({
-    text: dom.input.value,
-    time: firebase.firestore.FieldValue.serverTimestamp()
-  });
-  dom.input.value = "";
-}
-
-db.collection("messages").orderBy("time", "asc").onSnapshot(snap => {
-  console.log(snap);
-  for (const change of snap.docChanges()) {
-    if (change.type === "added") {
-      const el = document.createElement("p");
-      el.innerText = change.doc.data().text;
-      dom.history.appendChild(el);
-    }
-  }
-});
-
-dom.input.addEventListener("keypress", evt => {
-  if (evt.keyCode === 13 && !evt.shiftKey) {
-    submit();
-    evt.preventDefault();
-  }
-});
-
-dom.submit.addEventListener("click", evt => {
-  submit();
-});
-</script>
diff --git a/firestore-emulator/browser-quickstart/test/test.js b/firestore-emulator/browser-quickstart/test/test.js
deleted file mode 100644
index 08a903e9..00000000
--- a/firestore-emulator/browser-quickstart/test/test.js
+++ /dev/null
@@ -1,23 +0,0 @@
-const puppeteer = require('puppeteer');
-const expect = require("chai").expect;
-
-it('works', async () => {
-  const browser = await puppeteer.launch();
-  const page = await browser.newPage();
-  await page.goto('http://localhost:5000');
-
-  const { before, after } = await page.evaluate(async () => {
-    const chat = document.getElementById("history");
-    const before = chat.innerText;
-    document.getElementById("input").innerText = "Hello, World!";
-    document.getElementById("submit").click();
-    await new Promise(r => setTimeout(r, 100));
-    const after = chat.innerText;
-    return { before, after };
-  });
-
-  expect(before).to.be.eql("");
-  expect(after).to.be.eql("Hello, World!");
-
-  await browser.close();
-});
diff --git a/firestore-emulator/javascript-quickstart/.eslintrc b/firestore-emulator/javascript-quickstart/.eslintrc
deleted file mode 100644
index 703ba3c9..00000000
--- a/firestore-emulator/javascript-quickstart/.eslintrc
+++ /dev/null
@@ -1,10 +0,0 @@
-{
-    "extends": "google",
-    "parserOptions": {
-        "ecmaVersion": 2017,
-        "sourceType": "module"
-    },
-    "rules": {
-        "max-len": [1, 100, 4]
-    }
-}
diff --git a/firestore-emulator/javascript-quickstart/README.md b/firestore-emulator/javascript-quickstart/README.md
deleted file mode 100644
index 8fcae642..00000000
--- a/firestore-emulator/javascript-quickstart/README.md
+++ /dev/null
@@ -1,67 +0,0 @@
-# Cloud Firestore emulator quickstart
-
-Let's try writing some simple tests for our security rules.
-
-## Setup
-
-### Start in the right directory
-
-To use this, some people may clone the entire quickstart-nodejs directory.
-When starting the quickstart, cd to the specific quickstart related to your
-project (i.e. `cd firestore-emulator/javascript-quickstart`).
-
-### Install Node dependencies
-
-Run `npm install` from this directory, and make sure that you have a recent
-version of the [Firebase CLI tool](https://github.com/firebase/firebase-tools)
-installed (you'll need `firebase --version` to be at least `6.3.0`).
-
-### Running the emulator
-
-Setup the Firestore emulator
-```
-firebase setup:emulators:firestore
-```
-Add your project to the emulator (use `firebase init` if no project setup)
-```
-firebase use --add your-project-name
-```
-If another app's using the 8080 port, update the firebase.json file to
-look like this
-```
-{
-  "firestore": {
-    "rules": "firestore.rules"
-  },
-  "emulators": {
-    "firestore": {
-      "port": "PORT"
-    }
-  }
-}
-```
-Start the firestore emulator (and leave it running during the tests)
-```
-firebase emulators:start --only firestore
-```
-
-## Running the tests
-
-To run the tests, open a new terminal (in your specific quickstart directory, not '/quickstart-nodejs') and execute
-```
-npm test
-```
-which runs all the tests in the `tests/` directory.
-
-```
-    ✓ require users to log in before creating a profile (71ms)
-    ✓ should enforce the createdAt date in user profiles (79ms)
-    ✓ should only let users create their own profile (57ms)
-    ✓ should let anyone read any profile (40ms)
-    ✓ should let anyone create a room (44ms)
-    ✓ should force people to name themselves as room owner when creating a room (48ms)
-    ✓ should not let one user steal a room from another user (119ms)
-
-
-  7 passing (607ms)
-```
diff --git a/firestore-emulator/javascript-quickstart/firebase.json b/firestore-emulator/javascript-quickstart/firebase.json
deleted file mode 100644
index 0b4f056b..00000000
--- a/firestore-emulator/javascript-quickstart/firebase.json
+++ /dev/null
@@ -1,10 +0,0 @@
-{
-  "firestore": {
-    "rules": "firestore.rules"
-  },
-  "emulators": {
-    "firestore": {
-      "port": 8080
-    }
-  }
-}
diff --git a/firestore-emulator/javascript-quickstart/firestore.rules b/firestore-emulator/javascript-quickstart/firestore.rules
deleted file mode 100644
index 7f77702d..00000000
--- a/firestore-emulator/javascript-quickstart/firestore.rules
+++ /dev/null
@@ -1,15 +0,0 @@
-service cloud.firestore {
-  match /databases/{database}/documents {
-    match /users/{userId} {
-      allow read;
-      allow create: if request.auth.uid == userId && request.resource.data.createdAt == request.time;
-    }
-    match /rooms/{roomId} {
-      allow read;
-      // If you create a room, you must set yourself as the owner.
-      allow create: if request.resource.data.owner == request.auth.uid;
-      // Only the room owner is allowed to modify it.
-      allow update: if resource.data.owner == request.auth.uid;
-    }
-  }
-}
diff --git a/firestore-emulator/javascript-quickstart/package.json b/firestore-emulator/javascript-quickstart/package.json
deleted file mode 100644
index 9e71b33f..00000000
--- a/firestore-emulator/javascript-quickstart/package.json
+++ /dev/null
@@ -1,15 +0,0 @@
-{
-  "name": "cloud-firestore-emulator-javascript-quickstart",
-  "version": "1.0.2",
-  "description": "Cloud Firestore emulator testing",
-  "scripts": {
-    "format": "prettier --write **/*.js",
-    "test": "mocha --timeout=10000"
-  },
-  "devDependencies": {
-    "@firebase/testing": "0.10.0",
-    "filesystem": "1.0.1",
-    "mocha": "5.2.0",
-    "prettier": "1.15.2"
-  }
-}
diff --git a/firestore-emulator/javascript-quickstart/test/test.js b/firestore-emulator/javascript-quickstart/test/test.js
deleted file mode 100644
index 9c143380..00000000
--- a/firestore-emulator/javascript-quickstart/test/test.js
+++ /dev/null
@@ -1,138 +0,0 @@
-const firebase = require("@firebase/testing");
-const fs = require("fs");
-
-/*
- * ============
- *    Setup
- * ============
- */
-const projectId = "firestore-emulator-example";
-const firebasePort = require("../firebase.json").emulators.firestore.port;
-const port = firebasePort /** Exists? */ ? firebasePort : 8080;
-const coverageUrl = `http://localhost:${port}/emulator/v1/projects/${projectId}:ruleCoverage.html`;
-
-const rules = fs.readFileSync("firestore.rules", "utf8");
-
-/**
- * Creates a new app with authentication data matching the input.
- *
- * @param {object} auth the object to use for authentication (typically {uid: some-uid})
- * @return {object} the app.
- */
-function authedApp(auth) {
-  return firebase.initializeTestApp({ projectId, auth }).firestore();
-}
-
-/*
- * ============
- *  Test Cases
- * ============
- */
-beforeEach(async () => {
-  // Clear the database between tests
-  await firebase.clearFirestoreData({ projectId });
-});
-
-before(async () => {
-  await firebase.loadFirestoreRules({ projectId, rules });
-});
-
-after(async () => {
-  await Promise.all(firebase.apps().map(app => app.delete()));
-  console.log(`View rule coverage information at ${coverageUrl}\n`);
-});
-
-describe("My app", () => {
-  it("require users to log in before creating a profile", async () => {
-    const db = authedApp(null);
-    const profile = db.collection("users").doc("alice");
-    await firebase.assertFails(profile.set({ birthday: "January 1" }));
-  });
-
-  it("should enforce the createdAt date in user profiles", async () => {
-    const db = authedApp({ uid: "alice" });
-    const profile = db.collection("users").doc("alice");
-    await firebase.assertFails(profile.set({ birthday: "January 1" }));
-    await firebase.assertSucceeds(
-      profile.set({
-        birthday: "January 1",
-        createdAt: firebase.firestore.FieldValue.serverTimestamp()
-      })
-    );
-  });
-
-  it("should only let users create their own profile", async () => {
-    const db = authedApp({ uid: "alice" });
-    await firebase.assertSucceeds(
-      db
-        .collection("users")
-        .doc("alice")
-        .set({
-          birthday: "January 1",
-          createdAt: firebase.firestore.FieldValue.serverTimestamp()
-        })
-    );
-    await firebase.assertFails(
-      db
-        .collection("users")
-        .doc("bob")
-        .set({
-          birthday: "January 1",
-          createdAt: firebase.firestore.FieldValue.serverTimestamp()
-        })
-    );
-  });
-
-  it("should let anyone read any profile", async () => {
-    const db = authedApp(null);
-    const profile = db.collection("users").doc("alice");
-    await firebase.assertSucceeds(profile.get());
-  });
-
-  it("should let anyone create a room", async () => {
-    const db = authedApp({ uid: "alice" });
-    const room = db.collection("rooms").doc("firebase");
-    await firebase.assertSucceeds(
-      room.set({
-        owner: "alice",
-        topic: "All Things Firebase"
-      })
-    );
-  });
-
-  it("should force people to name themselves as room owner when creating a room", async () => {
-    const db = authedApp({ uid: "alice" });
-    const room = db.collection("rooms").doc("firebase");
-    await firebase.assertFails(
-      room.set({
-        owner: "scott",
-        topic: "Firebase Rocks!"
-      })
-    );
-  });
-
-  it("should not let one user steal a room from another user", async () => {
-    const alice = authedApp({ uid: "alice" });
-    const bob = authedApp({ uid: "bob" });
-
-    await firebase.assertSucceeds(
-      bob
-        .collection("rooms")
-        .doc("snow")
-        .set({
-          owner: "bob",
-          topic: "All Things Snowboarding"
-        })
-    );
-
-    await firebase.assertFails(
-      alice
-        .collection("rooms")
-        .doc("snow")
-        .set({
-          owner: "alice",
-          topic: "skiing > snowboarding"
-        })
-    );
-  });
-});
diff --git a/firestore-emulator/typescript-quickstart/.eslintrc b/firestore-emulator/typescript-quickstart/.eslintrc
deleted file mode 100644
index 98c68efa..00000000
--- a/firestore-emulator/typescript-quickstart/.eslintrc
+++ /dev/null
@@ -1,10 +0,0 @@
-{
-    "extends": "google",
-    "parser": "typescript-eslint-parser",
-    "parserOptions": {
-        "sourceType": "module"
-    },
-    "rules": {
-        "max-len": [1, 100, 4]
-    }
-}
diff --git a/firestore-emulator/typescript-quickstart/.gitignore b/firestore-emulator/typescript-quickstart/.gitignore
deleted file mode 100644
index 4e57eef8..00000000
--- a/firestore-emulator/typescript-quickstart/.gitignore
+++ /dev/null
@@ -1,2 +0,0 @@
-*.js
-*.js.map
diff --git a/firestore-emulator/typescript-quickstart/.npmignore b/firestore-emulator/typescript-quickstart/.npmignore
deleted file mode 100644
index f0e06b3b..00000000
--- a/firestore-emulator/typescript-quickstart/.npmignore
+++ /dev/null
@@ -1,2 +0,0 @@
-*.ts
-!*.d.ts
diff --git a/firestore-emulator/typescript-quickstart/README.md b/firestore-emulator/typescript-quickstart/README.md
deleted file mode 100644
index 5422c96a..00000000
--- a/firestore-emulator/typescript-quickstart/README.md
+++ /dev/null
@@ -1,43 +0,0 @@
-# Cloud Firestore emulator quickstart
-
-Let's try writing some simple tests for our security rules.
-
-## Setup
-
-### Install Node dependencies
-
-Run `npm install` from this directory, and make sure that you have a recent
-version of the [Firebase CLI tool](https://github.com/firebase/firebase-tools)
-installed (you'll need `firebase --version` to be at least `6.10.0`).
-
-### Running the emulator
-
-Setup the Firestore emulator
-```
-firebase setup:emulators:firestore
-```
-Start the firestore emulator (and leave it running during the tests)
-```
-firebase emulators:start --only firestore
-```
-
-## Running the tests
-
-To run the tests, execute
-```
-npm test
-```
-which runs all the tests in the `tests/` directory.
-
-```
-    ✓ require users to log in before creating a profile (71ms)
-    ✓ should enforce the createdAt date in user profiles (79ms)
-    ✓ should only let users create their own profile (57ms)
-    ✓ should let anyone read any profile (40ms)
-    ✓ should let anyone create a room (44ms)
-    ✓ should force people to name themselves as room owner when creating a room (48ms)
-    ✓ should not let one user steal a room from another user (119ms)
-
-
-  7 passing (607ms)
-```
diff --git a/firestore-emulator/typescript-quickstart/firebase.json b/firestore-emulator/typescript-quickstart/firebase.json
deleted file mode 100644
index 0207c3fc..00000000
--- a/firestore-emulator/typescript-quickstart/firebase.json
+++ /dev/null
@@ -1,5 +0,0 @@
-{
-  "firestore": {
-    "rules": "firestore.rules"
-  }
-}
diff --git a/firestore-emulator/typescript-quickstart/firestore.rules b/firestore-emulator/typescript-quickstart/firestore.rules
deleted file mode 100644
index 7f77702d..00000000
--- a/firestore-emulator/typescript-quickstart/firestore.rules
+++ /dev/null
@@ -1,15 +0,0 @@
-service cloud.firestore {
-  match /databases/{database}/documents {
-    match /users/{userId} {
-      allow read;
-      allow create: if request.auth.uid == userId && request.resource.data.createdAt == request.time;
-    }
-    match /rooms/{roomId} {
-      allow read;
-      // If you create a room, you must set yourself as the owner.
-      allow create: if request.resource.data.owner == request.auth.uid;
-      // Only the room owner is allowed to modify it.
-      allow update: if resource.data.owner == request.auth.uid;
-    }
-  }
-}
diff --git a/firestore-emulator/typescript-quickstart/package.json b/firestore-emulator/typescript-quickstart/package.json
deleted file mode 100644
index 164022bb..00000000
--- a/firestore-emulator/typescript-quickstart/package.json
+++ /dev/null
@@ -1,21 +0,0 @@
-{
-  "name": "cloud-firestore-emulator-typescript-quickstart",
-  "version": "1.0.2",
-  "description": "Cloud Firestore emulator testing, with TypeScript",
-  "scripts": {
-    "format": "prettier --write **/*.ts",
-    "pretest": "tsc",
-    "test": "mocha --timeout=10000"
-  },
-  "devDependencies": {
-    "@firebase/testing": "0.10.0",
-    "@types/mocha": "5.2.5",
-    "filesystem": "1.0.1",
-    "mocha": "5.2.0",
-    "mocha-typescript": "1.1.17",
-    "prettier": "1.15.2",
-    "source-map-support": "0.5.9",
-    "ts-node": "7.0.1",
-    "typescript": "3.1.3"
-  }
-}
diff --git a/firestore-emulator/typescript-quickstart/test/mocha.opts b/firestore-emulator/typescript-quickstart/test/mocha.opts
deleted file mode 100644
index bb4e3905..00000000
--- a/firestore-emulator/typescript-quickstart/test/mocha.opts
+++ /dev/null
@@ -1,3 +0,0 @@
---ui mocha-typescript
---require source-map-support/register
---recursive test
diff --git a/firestore-emulator/typescript-quickstart/test/test.ts b/firestore-emulator/typescript-quickstart/test/test.ts
deleted file mode 100644
index 214d64ce..00000000
--- a/firestore-emulator/typescript-quickstart/test/test.ts
+++ /dev/null
@@ -1,147 +0,0 @@
-/// <reference path='../node_modules/mocha-typescript/globals.d.ts' />
-import * as firebase from "@firebase/testing";
-import * as fs from "fs";
-
-/*
- * ============
- *    Setup
- * ============
- */
-const projectId = "firestore-emulator-example";
-const coverageUrl = `http://localhost:8080/emulator/v1/projects/${projectId}:ruleCoverage.html`;
-
-const rules = fs.readFileSync("firestore.rules", "utf8");
-
-/**
- * Creates a new app with authentication data matching the input.
- *
- * @param {object} auth the object to use for authentication (typically {uid: some-uid})
- * @return {object} the app.
- */
-function authedApp(auth) {
-  return firebase
-    .initializeTestApp({ projectId, auth })
-    .firestore();
-}
-
-/*
- * ============
- *  Test Cases
- * ============
- */
-before(async () => {
-  await firebase.loadFirestoreRules({ projectId, rules });
-});
-
-beforeEach(async () => {
-  // Clear the database between tests
-  await firebase.clearFirestoreData({ projectId });
-});
-
-after(async () => {
-  await Promise.all(firebase.apps().map(app => app.delete()));
-  console.log(`View rule coverage information at ${coverageUrl}\n`);
-});
-
-@suite
-class MyApp {
-  @test
-  async "require users to log in before creating a profile"() {
-    const db = authedApp(null);
-    const profile = db.collection("users").doc("alice");
-    await firebase.assertFails(profile.set({ birthday: "January 1" }));
-  }
-
-  @test
-  async "should enforce the createdAt date in user profiles"() {
-    const db = authedApp({ uid: "alice" });
-    const profile = db.collection("users").doc("alice");
-    await firebase.assertFails(profile.set({ birthday: "January 1" }));
-    await firebase.assertSucceeds(
-      profile.set({
-        birthday: "January 1",
-        createdAt: firebase.firestore.FieldValue.serverTimestamp()
-      })
-    );
-  }
-
-  @test
-  async "should only let users create their own profile"() {
-    const db = authedApp({ uid: "alice" });
-    await firebase.assertSucceeds(
-      db
-        .collection("users")
-        .doc("alice")
-        .set({
-          birthday: "January 1",
-          createdAt: firebase.firestore.FieldValue.serverTimestamp()
-        })
-    );
-    await firebase.assertFails(
-      db
-        .collection("users")
-        .doc("bob")
-        .set({
-          birthday: "January 1",
-          createdAt: firebase.firestore.FieldValue.serverTimestamp()
-        })
-    );
-  }
-
-  @test
-  async "should let anyone read any profile"() {
-    const db = authedApp(null);
-    const profile = db.collection("users").doc("alice");
-    await firebase.assertSucceeds(profile.get());
-  }
-
-  @test
-  async "should let anyone create a room"() {
-    const db = authedApp({ uid: "alice" });
-    const room = db.collection("rooms").doc("firebase");
-    await firebase.assertSucceeds(
-      room.set({
-        owner: "alice",
-        topic: "All Things Firebase"
-      })
-    );
-  }
-
-  @test
-  async "should force people to name themselves as room owner when creating a room"() {
-    const db = authedApp({ uid: "alice" });
-    const room = db.collection("rooms").doc("firebase");
-    await firebase.assertFails(
-      room.set({
-        owner: "scott",
-        topic: "Firebase Rocks!"
-      })
-    );
-  }
-
-  @test
-  async "should not let one user steal a room from another user"() {
-    const alice = authedApp({ uid: "alice" });
-    const bob = authedApp({ uid: "bob" });
-
-    await firebase.assertSucceeds(
-      bob
-        .collection("rooms")
-        .doc("snow")
-        .set({
-          owner: "bob",
-          topic: "All Things Snowboarding"
-        })
-    );
-
-    await firebase.assertFails(
-      alice
-        .collection("rooms")
-        .doc("snow")
-        .set({
-          owner: "alice",
-          topic: "skiing > snowboarding"
-        })
-    );
-  }
-}
diff --git a/firestore-emulator/typescript-quickstart/tsconfig.json b/firestore-emulator/typescript-quickstart/tsconfig.json
deleted file mode 100644
index b1a0d86f..00000000
--- a/firestore-emulator/typescript-quickstart/tsconfig.json
+++ /dev/null
@@ -1,9 +0,0 @@
-{
-    "compilerOptions": {
-        "target": "es6",
-        "module": "commonjs",
-        "sourceMap": true,
-        "experimentalDecorators": true,
-        "lib": [ "es6", "dom" ]
-    }
-}
diff --git a/messaging/.gitignore b/messaging/.gitignore
deleted file mode 100644
index 4f46cac7..00000000
--- a/messaging/.gitignore
+++ /dev/null
@@ -1,3 +0,0 @@
-config.json
-service-account.json
-node_modules
\ No newline at end of file
diff --git a/messaging/README.md b/messaging/README.md
deleted file mode 100644
index efd63568..00000000
--- a/messaging/README.md
+++ /dev/null
@@ -1,102 +0,0 @@
-Firebase Cloud Messaging Node.js Quickstart
-===========================================
-
-The Firebase Cloud Messaging Node.js quickstart app demonstrates sending
-notification messages to a topic. All clients subscribed to the topic
-will receive the message.
-
-Introduction
-------------
-
-This is a simple example of using Firebase Cloud Messaging REST API to send
-the same message to different platforms. To learn more about how you can use
-Firebase Cloud Messaging REST API in your app, see [About Cloud Messaging Server](https://firebase.google.com/docs/cloud-messaging/server/).
-
-Getting started
----------------
-
-1. Create a service account as described in [Adding Firebase to your Server](https://firebase.google.com/docs/admin/setup) and download the JSON file.
-  - Copy the json file to this folder and rename it to `service-account.json`.
-2. Change the `PROJECT_ID` variable in `index.js` to your project ID.
-3. Ensure that you have [`googleapis`](https://github.com/google/google-api-nodejs-client) installed.
-
-        npm install googleapis
-
-Run
----
-- This sample allows you to send two types of messages:
-
-  1. A message that uses the common `notification` object of the API. It is used to define
-  the `title` and `body` of a notification message (display message). To send this message, from the
-  `messaging` directory run:
-
-         node index.js common-message
-
-  2. A message that uses the common `notification` object of the API as well as tha `android` and
-  `apns` objects to customize the messages received on the corresponding platforms. To send this
-  message, from the `messaging` directory run:
-
-         node index.js override-message
-
-- Any client devices that you have subscribed to the news topic should receive
-  a notification message.
-
-  1. When you use the `common-message` option, clients receive a simple notification message
-  with only title and body defined.
-
-  2. When you use the `override-message` option, clients receive a simple notification message
-  with title and body defined. In addition:
-    - iOS devices would receive high priority messages and if the app is in the background then a
-    badge will be applied to the app's icon.
-
-    - Android devices would receive a message with a `click_action`. In this case it is set
-    to the default intent, but this could be customized to any intent available in your app.
-
-Best practices
---------------
-This section provides some additional information about how the FCM payloads can
-be used to target different platforms.
-
-### Common payloads ###
-
-In many cases you may want to send the same message to multiple platforms. If
-this is a notification message (display notification) then you can use the
-common payloads. These are payloads that are automatically translated to their
-platform equivalent payloads.
-
-### Platform customizations ###
-
-In cases where you would like to customize the message for the different platforms
-that will receive the message, use the platform specific objects to add or override
-anything set by the common fields.
-
-For example, if you want to send a notification message (display notification) to all platforms
-but you would like to include accompanying data to Android clients receiving the
-message, then you can use the `android` object to define a `data` payload that will
-be appended to the notification message when sent to Android clients.
-
-Support
--------
-
-- [Stack Overflow](https://stackoverflow.com/questions/tagged/firebase-cloud-messaging)
-- [Firebase Support](https://firebase.google.com/support/)
-
-License
--------
-
-Copyright 2016 Google, Inc.
-
-Licensed to the Apache Software Foundation (ASF) under one or more contributor
-license agreements.  See the NOTICE file distributed with this work for
-additional information regarding copyright ownership.  The ASF licenses this
-file to you under the Apache License, Version 2.0 (the "License"); you may not
-use this file except in compliance with the License.  You may obtain a copy of
-the License at
-
-  http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
-WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
-License for the specific language governing permissions and limitations under
-the License.
diff --git a/messaging/index.js b/messaging/index.js
deleted file mode 100644
index a7a55b91..00000000
--- a/messaging/index.js
+++ /dev/null
@@ -1,140 +0,0 @@
-/**
- * Firebase Cloud Messaging (FCM) can be used to send messages to clients on iOS, Android and Web.
- *
- * This sample uses FCM to send two types of messages to clients that are subscribed to the `news`
- * topic. One type of message is a simple notification message (display message). The other is
- * a notification message (display notification) with platform specific customizations. For example,
- * a badge is added to messages that are sent to iOS devices.
- */
-const https = require('https');
-var fs = require('fs');
-var {google} = require('googleapis');
-var PROJECT_ID = '<YOUR-PROJECT-ID>';
-var HOST = 'fcm.googleapis.com';
-var PATH = '/v1/projects/' + PROJECT_ID + '/messages:send';
-var MESSAGING_SCOPE = 'https://www.googleapis.com/auth/firebase.messaging';
-var SCOPES = [MESSAGING_SCOPE];
-
-/**
- * Get a valid access token.
- */
-// [START retrieve_access_token]
-function getAccessToken() {
-  return new Promise(function(resolve, reject) {
-    var key = require('./service-account.json');
-    var jwtClient = new google.auth.JWT(
-      key.client_email,
-      null,
-      key.private_key,
-      SCOPES,
-      null
-    );
-    jwtClient.authorize(function(err, tokens) {
-      if (err) {
-        reject(err);
-        return;
-      }
-      resolve(tokens.access_token);
-    });
-  });
-}
-// [END retrieve_access_token]
-
-/**
- * Send HTTP request to FCM with given message.
- *
- * @param {JSON} fcmMessage will make up the body of the request.
- */
-function sendFcmMessage(fcmMessage) {
-  getAccessToken().then(function(accessToken) {
-    var options = {
-      hostname: HOST,
-      path: PATH,
-      method: 'POST',
-      // [START use_access_token]
-      headers: {
-        'Authorization': 'Bearer ' + accessToken
-      }
-      // [END use_access_token]
-    };
-
-    var request = https.request(options, function(resp) {
-      resp.setEncoding('utf8');
-      resp.on('data', function(data) {
-        console.log('Message sent to Firebase for delivery, response:');
-        console.log(data);
-      });
-    });
-
-    request.on('error', function(err) {
-      console.log('Unable to send message to Firebase');
-      console.log(err);
-    });
-
-    request.write(JSON.stringify(fcmMessage));
-    request.end();
-  });
-}
-
-/**
- * Construct a JSON object that will be used to customize
- * the messages sent to iOS and Android devices.
- */
-function buildOverrideMessage() {
-  var fcmMessage = buildCommonMessage();
-  var apnsOverride = {
-    'payload': {
-      'aps': {
-        'badge': 1
-      }
-    },
-    'headers': {
-      'apns-priority': '10'
-    }
-  };
-
-  var androidOverride = {
-    'notification': {
-      'click_action': 'android.intent.action.MAIN'
-    }
-  };
-
-  fcmMessage['message']['android'] = androidOverride;
-  fcmMessage['message']['apns'] = apnsOverride;
-
-  return fcmMessage;
-}
-
-/**
- * Construct a JSON object that will be used to define the
- * common parts of a notification message that will be sent
- * to any app instance subscribed to the news topic.
- */
-function buildCommonMessage() {
-  return {
-    'message': {
-      'topic': 'news',
-      'notification': {
-        'title': 'FCM Notification',
-        'body': 'Notification from FCM'
-      }
-    }
-  };
-}
-
-var message = process.argv[2];
-if (message && message == 'common-message') {
-  var commonMessage = buildCommonMessage();
-  console.log('FCM request body for message using common notification object:');
-  console.log(JSON.stringify(commonMessage, null, 2));
-  sendFcmMessage(buildCommonMessage());
-} else if (message && message == 'override-message') {
-  var overrideMessage = buildOverrideMessage();
-  console.log('FCM request body for override message:');
-  console.log(JSON.stringify(overrideMessage, null, 2));
-  sendFcmMessage(buildOverrideMessage());
-} else {
-  console.log('Invalid command. Please use one of the following:\n'
-      + 'node index.js common-message\n'
-      + 'node index.js override-message');
-}
diff --git a/messaging/package.json b/messaging/package.json
deleted file mode 100644
index 3206ae2f..00000000
--- a/messaging/package.json
+++ /dev/null
@@ -1,6 +0,0 @@
-{
-  "dependencies": {
-    "google-auth-library": "^0.10.0",
-    "googleapis": "^20.1.0"
-  }
-}
\ No newline at end of file