diff --git a/README.md b/README.md
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--- a/README.md
+++ b/README.md
@@ -1 +1,174 @@
-# TODO
+# Itineris WP Coding Standards
+
+[![Packagist Version](https://img.shields.io/packagist/v/itinerisltd/itineris-wp-coding-standards.svg)](https://packagist.org/packages/itinerisltd/itineris-wp-coding-standards)
+[![PHP from Packagist](https://img.shields.io/packagist/php-v/itinerisltd/itineris-wp-coding-standards.svg)](https://packagist.org/packages/itinerisltd/itineris-wp-coding-standards)
+[![Packagist Downloads](https://img.shields.io/packagist/dt/itinerisltd/itineris-wp-coding-standards.svg)](https://packagist.org/packages/itinerisltd/itineris-wp-coding-standards)
+[![GitHub License](https://img.shields.io/github/license/itinerisltd/itineris-wp-coding-standards.svg)](https://github.com/ItinerisLtd/itineris-wp-coding-standards/blob/master/LICENSE)
+[![Hire Itineris](https://img.shields.io/badge/Hire-Itineris-ff69b4.svg)](https://www.itineris.co.uk/contact/)
+
+<!-- START doctoc generated TOC please keep comment here to allow auto update -->
+<!-- DON'T EDIT THIS SECTION, INSTEAD RE-RUN doctoc TO UPDATE -->
+
+
+- [Goal](#goal)
+- [Installation](#installation)
+- [Usage](#usage)
+- [PrettyCI](#prettyci)
+- [Required Readings](#required-readings)
+- [FAQs](#faqs)
+  - [Will you add support for older PHP versions?](#will-you-add-support-for-older-php-versions)
+  - [It looks awesome. Where can I find some more goodies like this?](#it-looks-awesome-where-can-i-find-some-more-goodies-like-this)
+  - [This isn't on wp.org. Where can I give a ⭐️⭐️⭐️⭐️⭐️ review?](#this-isnt-on-wporg-where-can-i-give-a-%EF%B8%8F%EF%B8%8F%EF%B8%8F%EF%B8%8F%EF%B8%8F-review)
+- [Feedback](#feedback)
+- [Change Log](#change-log)
+- [Security](#security)
+- [Credits](#credits)
+- [License](#license)
+
+<!-- END doctoc generated TOC please keep comment here to allow auto update -->
+
+## Goal
+
+[Itineris WP Coding Standards](https://github.com/ItinerisLtd/itineris-wp-coding-standards) is a project with rulesets for code style and quality tools to be used in Itineris WordPress projects.
+
+It is a mix with [PSR-1](https://www.php-fig.org/psr/psr-1/), [PSR-2](https://www.php-fig.org/psr/psr-2), [PSR-4](https://www.php-fig.org/psr/psr-4/), [WordPress Coding Standards](https://github.com/WordPress-Coding-Standards/WordPress-Coding-Standards) and [Automattic/VIP-Coding-Standards](https://github.com/Automattic/VIP-Coding-Standards).
+
+Whenever there's a conflict between PSR and WPCS, always prefer PSR.
+
+Currently, it works for WordPress plugins.
+Using it on [Bedrock](https://github.com/roots/bedrock) or [Sage](https://github.com/roots/sage) requires some tweaking.
+
+## Installation
+
+```bash
+$ composer require --dev itinerisltd/itineris-wp-coding-standards
+```
+
+## Usage
+
+First, create [`phpcs.xml`](https://github.com/squizlabs/PHP_CodeSniffer/wiki/Annotated-Ruleset) on project root:
+```xml
+<?xml version="1.0"?>
+<ruleset name="MyAwesomePlugin">
+    <!-- Check all files under project root -->
+    <file>./</file>
+
+    <!-- Show sniff codes in all reports -->
+    <arg value="s"/>
+
+    <!-- Install custom rulesets -->
+    <config name="installed_paths" value="vendor/wp-coding-standards/wpcs,vendor/automattic/vipwpcs,vendor/itinerisltd/itineris-wp-coding-standards"/>
+
+    <!-- Use Itineris WP Coding Standards -->
+    <rule ref="Itineris"/>
+
+    <!-- TODO: Change everything below! -->
+    <!-- TODO: Exclude specific rules if necessary -->
+
+    <!-- TODO: Exclude some files -->
+    <exclude-pattern>/my-awesome-plugin.php</exclude-pattern>
+    <exclude-pattern>/tests/*</exclude-pattern>
+    <exclude-pattern>/vendor/*</exclude-pattern>
+
+    <!-- TODO: Define minimum supported WordPress version -->
+    <config name="minimum_supported_wp_version" value="4.9"/>
+
+    <!-- TODO: Define expected text domains -->
+    <rule ref="WordPress.WP.I18n">
+        <properties>
+            <property name="text_domain" type="array" value="wc-worldpay,woocommerce"/>
+        </properties>
+    </rule>
+</ruleset>
+```
+
+Then, define a composer script:
+```json
+# composer.json
+{
+  "scripts": {
+    "check-style": "phpcs --colors -p"
+  }
+}
+```
+
+Run the command:
+```php
+composer check-style
+```
+
+## PrettyCI
+
+Create [`.prettyci.composer.json`](https://prettyci.com/documentation) at project root:
+```php
+# .prettyci.composer.json
+{
+  "require-dev": {
+       "itinerisltd/itineris-wp-coding-standards": "^999.999.999"
+   }
+}
+```
+
+To make [PrettyCI](https://prettyci.com) works, ensure:
+ - you created [`.prettyci.composer.json`](https://prettyci.com/documentation) at project root
+ - you created [`phpcs.xml`](#usage) at project root
+ - versions in `.prettyci.composer.json` are the same as in `composer.json`
+
+## Required Readings
+
+- [Whitelisting code which flags errors](https://github.com/WordPress-Coding-Standards/WordPress-Coding-Standards/wiki/Whitelisting-code-which-flags-errors)
+- [Flagged superglobal usage in WordPress VIP](https://github.com/WordPress-Coding-Standards/WordPress-Coding-Standards/wiki/Flagged-superglobal-usage-in-WordPress-VIP)
+- [Fixing errors for input data](https://github.com/WordPress-Coding-Standards/WordPress-Coding-Standards/wiki/Fixing-errors-for-input-data)
+- [Sanitizing array input data](https://github.com/WordPress-Coding-Standards/WordPress-Coding-Standards/wiki/Sanitizing-array-input-data)
+- [Customizable sniff properties](https://github.com/WordPress-Coding-Standards/WordPress-Coding-Standards/wiki/Customizable-sniff-properties)
+
+## FAQs
+
+### Will you add support for older PHP versions?
+
+Never! This plugin will only works on [actively supported PHP versions](https://secure.php.net/supported-versions.php).
+
+Don't use it on **end of life** or **security fixes only** PHP versions.
+
+### It looks awesome. Where can I find some more goodies like this?
+
+- Articles on [Itineris' blog](https://www.itineris.co.uk/blog/)
+- More projects on [Itineris' GitHub profile](https://github.com/itinerisltd)
+- Follow [@itineris_ltd](https://twitter.com/itineris_ltd) and [@TangRufus](https://twitter.com/tangrufus) on Twitter
+- Hire [Itineris](https://www.itineris.co.uk/services/) to build your next awesome site
+
+### This isn't on wp.org. Where can I give a ⭐️⭐️⭐️⭐️⭐️ review?
+
+Thanks! Glad you like it. It's important to make my boss know somebody is using this project. Instead of giving reviews on wp.org, consider:
+
+- tweet something good with mentioning [@itineris_ltd](https://twitter.com/itineris_ltd)
+- star this [Github repo](https://github.com/ItinerisLtd/itineris-wp-coding-standards)
+- watch this [Github repo](https://github.com/ItinerisLtd/itineris-wp-coding-standards)
+- write blog posts
+- submit pull requests
+- [hire Itineris](https://www.itineris.co.uk/services/)
+
+## Feedback
+
+**Please provide feedback!** We want to make this library useful in as many projects as possible.
+Please submit an [issue](https://github.com/ItinerisLtd/itineris-wp-coding-standards/issues/new) and point out what you do and don't like, or fork the project and make suggestions.
+**No issue is too small.**
+
+## Change Log
+
+Please see [CHANGELOG](./CHANGELOG.md) for more information on what has changed recently.
+
+## Security
+
+If you discover any security related issues, please email [hello@itineris.co.uk](mailto:hello@itineris.co.uk) instead of using the issue tracker.
+
+## Credits
+
+[Itineris WP Coding Standards](https://github.com/ItinerisLtd/itineris-wp-coding-standards) is a [Itineris Limited](https://www.itineris.co.uk/) project created by [Tang Rufus](https://typist.tech).
+
+Full list of contributors can be found [here](https://github.com/ItinerisLtd/itineris-wp-coding-standards/graphs/contributors).
+
+## License
+
+[Itineris WP Coding Standards](https://github.com/ItinerisLtd/itineris-wp-coding-standards) is licensed under the [MIT License](https://opensource.org/licenses/MIT).
+Please see [License File](./LICENSE) for more information.