diff --git a/.gitignore b/.gitignore
new file mode 100644
index 000000000..22d0d82f8
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+vendor
diff --git a/.travis.yml b/.travis.yml
new file mode 100644
index 000000000..ce1973f8c
--- /dev/null
+++ b/.travis.yml
@@ -0,0 +1,64 @@
+sudo: false
+
+dist: trusty
+
+language: php
+
+php:
+    - 7.0
+    - 7.1
+    - 7.2
+    - 7.3
+
+notifications:
+  email:
+    on_success: never
+    on_failure: change
+
+branches:
+  only:
+    - master
+    - development
+
+cache:
+  apt: true
+  directories:
+    - vendor
+    - node_modules
+    - composer
+    - $HOME/.composer/cache
+
+matrix:
+  fast_finish: true
+  include:
+    - php: 7.3
+      env: WP_VERSION=latest WP_MULTISITE=0
+    - php: 7.2
+      env: WP_VERSION=latest WP_MULTISITE=0
+    - php: 7.2
+      env: WP_VERSION=latest WP_MULTISITE=1
+    - php: 7.1
+      env: WP_VERSION=latest WP_MULTISITE=0
+    - php: 7.0
+      env: WP_VERSION=latest WP_MULTISITE=1
+
+  allow_failures:
+    # Allow failures for unstable builds.
+    - php: nightly
+
+before_install:
+  # Speed up build time by disabling Xdebug.
+  # https://johnblackbourn.com/reducing-travis-ci-build-times-for-wordpress-projects/
+  # https://twitter.com/kelunik/status/954242454676475904
+  - phpenv config-rm xdebug.ini || echo 'No xdebug config.'
+  # Install PHP CodeSniffer.
+  - composer self-update
+  - composer clearcache
+  - composer install
+  - phpenv rehash
+
+script:
+  # Search for PHP syntax errors.
+  - find -L . -path ./vendor -prune -o -name '*.php' -print0 | xargs -0 -n 1 -P 4 php -l
+  # Run PHPCS.
+  - composer check-cs . -- --runtime-set ignore_warnings_on_exit 1
diff --git a/README.md b/README.md
new file mode 100644
index 000000000..ae733528e
--- /dev/null
+++ b/README.md
@@ -0,0 +1,3 @@
+# Eightshift Libs
+
+TBD
diff --git a/composer.json b/composer.json
new file mode 100644
index 000000000..69f8be61a
--- /dev/null
+++ b/composer.json
@@ -0,0 +1,44 @@
+{
+  "name": "infinum/eightshift-libs",
+  "description": "WordPress libs developed by Eightshift team to use in modern WordPress.",
+  "keywords": [
+    "composer", "installer", "plugin"
+  ],
+  "homepage": "https://eightshift.com/",
+  "license": "MIT",
+  "authors": [
+    {
+      "name": "Eightshift team",
+      "email": "team@eightshift.com",
+      "homepage": "https://eightshift.com/",
+      "role": "Developer / IT Manager"
+    }
+  ],
+  "support": {
+    "issues": "https://github.com/infinum/eightshift-libs/issues",
+    "source": "https://github.com/infinum/eightshift-libs"
+  },
+  "require": {
+    "php": ">=7.0"
+  },
+  "require-dev": {
+    "infinum/coding-standards-wp": "^0.4.1",
+    "dealerdirect/phpcodesniffer-composer-installer": "^0.5"
+  },
+  "autoload": {
+    "psr-4": {
+      "Eightshift_Libs\\": "src/"
+    }
+  },
+  "minimum-stability": "dev",
+  "prefer-stable": true,
+  "config": {
+    "sort-packages": true,
+    "optimize-autoloader": true,
+    "process-timeout": 2000
+  },
+  "scripts": {
+    "check-cs": "@php ./vendor/bin/phpcs",
+    "fix-cs": "@php ./vendor/bin/phpcbf"
+  }
+}
diff --git a/composer.lock b/composer.lock
new file mode 100644
index 000000000..50de2d975
--- /dev/null
+++ b/composer.lock
@@ -0,0 +1,389 @@
+{
+    "_readme": [
+        "This file locks the dependencies of your project to a known state",
+        "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
+        "This file is @generated automatically"
+    ],
+    "content-hash": "fda87bcab613aa12bab5ea6cc1cf4ea0",
+    "packages": [],
+    "packages-dev": [
+        {
+            "name": "dealerdirect/phpcodesniffer-composer-installer",
+            "version": "v0.5.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/Dealerdirect/phpcodesniffer-composer-installer.git",
+                "reference": "e749410375ff6fb7a040a68878c656c2e610b132"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/Dealerdirect/phpcodesniffer-composer-installer/zipball/e749410375ff6fb7a040a68878c656c2e610b132",
+                "reference": "e749410375ff6fb7a040a68878c656c2e610b132",
+                "shasum": ""
+            },
+            "require": {
+                "composer-plugin-api": "^1.0",
+                "php": "^5.3|^7",
+                "squizlabs/php_codesniffer": "^2|^3"
+            },
+            "require-dev": {
+                "composer/composer": "*",
+                "phpcompatibility/php-compatibility": "^9.0",
+                "sensiolabs/security-checker": "^4.1.0"
+            },
+            "type": "composer-plugin",
+            "extra": {
+                "class": "Dealerdirect\\Composer\\Plugin\\Installers\\PHPCodeSniffer\\Plugin"
+            },
+            "autoload": {
+                "psr-4": {
+                    "Dealerdirect\\Composer\\Plugin\\Installers\\PHPCodeSniffer\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Franck Nijhof",
+                    "email": "franck.nijhof@dealerdirect.com",
+                    "homepage": "http://www.frenck.nl",
+                    "role": "Developer / IT Manager"
+                }
+            ],
+            "description": "PHP_CodeSniffer Standards Composer Installer Plugin",
+            "homepage": "http://www.dealerdirect.com",
+            "keywords": [
+                "PHPCodeSniffer",
+                "PHP_CodeSniffer",
+                "code quality",
+                "codesniffer",
+                "composer",
+                "installer",
+                "phpcs",
+                "plugin",
+                "qa",
+                "quality",
+                "standard",
+                "standards",
+                "style guide",
+                "stylecheck",
+                "tests"
+            ],
+            "time": "2018-10-26T13:21:45+00:00"
+        },
+        {
+            "name": "infinum/coding-standards-wp",
+            "version": "0.4.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/infinum/coding-standards-wp.git",
+                "reference": "87aa3608eb064308291f8f7f3d3d30a8fd1ea296"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/infinum/coding-standards-wp/zipball/87aa3608eb064308291f8f7f3d3d30a8fd1ea296",
+                "reference": "87aa3608eb064308291f8f7f3d3d30a8fd1ea296",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.6",
+                "phpcompatibility/phpcompatibility-wp": "^2.0",
+                "squizlabs/php_codesniffer": "^3.3.0",
+                "wp-coding-standards/wpcs": "^1.0.0"
+            },
+            "require-dev": {
+                "dealerdirect/phpcodesniffer-composer-installer": "^0.4.3",
+                "phpcompatibility/php-compatibility": "^9.0",
+                "phpunit/phpunit": "^4.0 || ^5.0 || ^6.0 || ^7.0",
+                "roave/security-advisories": "dev-master"
+            },
+            "suggest": {
+                "dealerdirect/phpcodesniffer-composer-installer": "^0.4.3 || This Composer plugin will sort out the PHPCS 'installed_paths' automatically."
+            },
+            "type": "phpcodesniffer-standard",
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Contributors",
+                    "homepage": "https://github.com/infinum/coding-standards-wp/graphs/contributors"
+                }
+            ],
+            "description": "Infinum WordPress Coding Standards",
+            "homepage": "https://github.com/infinum/coding-standards-wp",
+            "keywords": [
+                "Eightshift",
+                "Infinum",
+                "phpcs",
+                "standards",
+                "wordpress"
+            ],
+            "time": "2018-11-15T12:49:58+00:00"
+        },
+        {
+            "name": "phpcompatibility/php-compatibility",
+            "version": "9.1.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/PHPCompatibility/PHPCompatibility.git",
+                "reference": "2b63c5d284ab8857f7b1d5c240ddb507a6b2293c"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/PHPCompatibility/PHPCompatibility/zipball/2b63c5d284ab8857f7b1d5c240ddb507a6b2293c",
+                "reference": "2b63c5d284ab8857f7b1d5c240ddb507a6b2293c",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.3",
+                "squizlabs/php_codesniffer": "^2.3 || ^3.0.2"
+            },
+            "conflict": {
+                "squizlabs/php_codesniffer": "2.6.2"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "~4.5 || ^5.0 || ^6.0 || ^7.0"
+            },
+            "suggest": {
+                "dealerdirect/phpcodesniffer-composer-installer": "^0.4.3 || This Composer plugin will sort out the PHPCS 'installed_paths' automatically.",
+                "roave/security-advisories": "dev-master || Helps prevent installing dependencies with known security issues."
+            },
+            "type": "phpcodesniffer-standard",
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "LGPL-3.0-or-later"
+            ],
+            "authors": [
+                {
+                    "name": "Contributors",
+                    "homepage": "https://github.com/PHPCompatibility/PHPCompatibility/graphs/contributors"
+                },
+                {
+                    "name": "Wim Godden",
+                    "homepage": "https://github.com/wimg",
+                    "role": "lead"
+                },
+                {
+                    "name": "Juliette Reinders Folmer",
+                    "homepage": "https://github.com/jrfnl",
+                    "role": "lead"
+                }
+            ],
+            "description": "A set of sniffs for PHP_CodeSniffer that checks for PHP cross-version compatibility.",
+            "homepage": "http://techblog.wimgodden.be/tag/codesniffer/",
+            "keywords": [
+                "compatibility",
+                "phpcs",
+                "standards"
+            ],
+            "time": "2018-12-30T23:16:27+00:00"
+        },
+        {
+            "name": "phpcompatibility/phpcompatibility-paragonie",
+            "version": "1.0.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/PHPCompatibility/PHPCompatibilityParagonie.git",
+                "reference": "9160de79fcd683b5c99e9c4133728d91529753ea"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/PHPCompatibility/PHPCompatibilityParagonie/zipball/9160de79fcd683b5c99e9c4133728d91529753ea",
+                "reference": "9160de79fcd683b5c99e9c4133728d91529753ea",
+                "shasum": ""
+            },
+            "require": {
+                "phpcompatibility/php-compatibility": "^9.0"
+            },
+            "require-dev": {
+                "dealerdirect/phpcodesniffer-composer-installer": "^0.4.4"
+            },
+            "suggest": {
+                "dealerdirect/phpcodesniffer-composer-installer": "^0.4.4 || This Composer plugin will sort out the PHP_CodeSniffer 'installed_paths' automatically.",
+                "roave/security-advisories": "dev-master || Helps prevent installing dependencies with known security issues."
+            },
+            "type": "phpcodesniffer-standard",
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "LGPL-3.0-or-later"
+            ],
+            "authors": [
+                {
+                    "name": "Wim Godden",
+                    "role": "lead"
+                },
+                {
+                    "name": "Juliette Reinders Folmer",
+                    "role": "lead"
+                }
+            ],
+            "description": "A set of rulesets for PHP_CodeSniffer to check for PHP cross-version compatibility issues in projects, while accounting for polyfills provided by the Paragonie polyfill libraries.",
+            "homepage": "http://phpcompatibility.com/",
+            "keywords": [
+                "compatibility",
+                "paragonie",
+                "phpcs",
+                "polyfill",
+                "standards"
+            ],
+            "time": "2018-12-16T19:10:44+00:00"
+        },
+        {
+            "name": "phpcompatibility/phpcompatibility-wp",
+            "version": "2.0.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/PHPCompatibility/PHPCompatibilityWP.git",
+                "reference": "cb303f0067cd5b366a41d4fb0e254fb40ff02efd"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/PHPCompatibility/PHPCompatibilityWP/zipball/cb303f0067cd5b366a41d4fb0e254fb40ff02efd",
+                "reference": "cb303f0067cd5b366a41d4fb0e254fb40ff02efd",
+                "shasum": ""
+            },
+            "require": {
+                "phpcompatibility/php-compatibility": "^9.0",
+                "phpcompatibility/phpcompatibility-paragonie": "^1.0"
+            },
+            "require-dev": {
+                "dealerdirect/phpcodesniffer-composer-installer": "^0.4.3"
+            },
+            "suggest": {
+                "dealerdirect/phpcodesniffer-composer-installer": "^0.4.3 || This Composer plugin will sort out the PHP_CodeSniffer 'installed_paths' automatically.",
+                "roave/security-advisories": "dev-master || Helps prevent installing dependencies with known security issues."
+            },
+            "type": "phpcodesniffer-standard",
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "LGPL-3.0-or-later"
+            ],
+            "authors": [
+                {
+                    "name": "Wim Godden",
+                    "role": "lead"
+                },
+                {
+                    "name": "Juliette Reinders Folmer",
+                    "role": "lead"
+                }
+            ],
+            "description": "A ruleset for PHP_CodeSniffer to check for PHP cross-version compatibility issues in projects, while accounting for polyfills provided by WordPress.",
+            "homepage": "http://phpcompatibility.com/",
+            "keywords": [
+                "compatibility",
+                "phpcs",
+                "standards",
+                "wordpress"
+            ],
+            "time": "2018-10-07T18:31:37+00:00"
+        },
+        {
+            "name": "squizlabs/php_codesniffer",
+            "version": "3.4.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/squizlabs/PHP_CodeSniffer.git",
+                "reference": "5b4333b4010625d29580eb4a41f1e53251be6baa"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/squizlabs/PHP_CodeSniffer/zipball/5b4333b4010625d29580eb4a41f1e53251be6baa",
+                "reference": "5b4333b4010625d29580eb4a41f1e53251be6baa",
+                "shasum": ""
+            },
+            "require": {
+                "ext-simplexml": "*",
+                "ext-tokenizer": "*",
+                "ext-xmlwriter": "*",
+                "php": ">=5.4.0"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "^4.0 || ^5.0 || ^6.0 || ^7.0"
+            },
+            "bin": [
+                "bin/phpcs",
+                "bin/phpcbf"
+            ],
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "3.x-dev"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Greg Sherwood",
+                    "role": "lead"
+                }
+            ],
+            "description": "PHP_CodeSniffer tokenizes PHP, JavaScript and CSS files and detects violations of a defined set of coding standards.",
+            "homepage": "https://github.com/squizlabs/PHP_CodeSniffer",
+            "keywords": [
+                "phpcs",
+                "standards"
+            ],
+            "time": "2019-03-19T03:22:27+00:00"
+        },
+        {
+            "name": "wp-coding-standards/wpcs",
+            "version": "1.2.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/WordPress-Coding-Standards/WordPress-Coding-Standards.git",
+                "reference": "f328bcafd97377e8e5e5d7b244d5ddbf301a3a5c"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/WordPress-Coding-Standards/WordPress-Coding-Standards/zipball/f328bcafd97377e8e5e5d7b244d5ddbf301a3a5c",
+                "reference": "f328bcafd97377e8e5e5d7b244d5ddbf301a3a5c",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.3",
+                "squizlabs/php_codesniffer": "^2.9.0 || ^3.0.2"
+            },
+            "require-dev": {
+                "phpcompatibility/php-compatibility": "^9.0"
+            },
+            "suggest": {
+                "dealerdirect/phpcodesniffer-composer-installer": "^0.4.3 || This Composer plugin will sort out the PHPCS 'installed_paths' automatically."
+            },
+            "type": "phpcodesniffer-standard",
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Contributors",
+                    "homepage": "https://github.com/WordPress-Coding-Standards/WordPress-Coding-Standards/graphs/contributors"
+                }
+            ],
+            "description": "PHP_CodeSniffer rules (sniffs) to enforce WordPress coding conventions",
+            "keywords": [
+                "phpcs",
+                "standards",
+                "wordpress"
+            ],
+            "time": "2018-12-18T09:43:51+00:00"
+        }
+    ],
+    "aliases": [],
+    "minimum-stability": "dev",
+    "stability-flags": [],
+    "prefer-stable": true,
+    "prefer-lowest": false,
+    "platform": {
+        "php": ">=7.0"
+    },
+    "platform-dev": []
+}
diff --git a/examples/admin/class-register-post-type.php b/examples/admin/class-register-post-type.php
new file mode 100644
index 000000000..3affd0477
--- /dev/null
+++ b/examples/admin/class-register-post-type.php
@@ -0,0 +1,72 @@
+<?php
+/**
+ * File that holds faq custom post type registration details
+ *
+ * @since 1.0.0
+ * @package Custom_Namespace\Admin
+ */
+
+namespace Custom_Namespace\Admin;
+
+use Eightshift_Libs\Custom_Post_Type\Base_Post_Type;
+use Eightshift_Libs\Custom_Post_Type\Label_Generator;
+
+/**
+ * Class that initializes the faq custom post type and taxonomy
+ *
+ * @since 1.0.0
+ */
+final class Faq extends Base_Post_Type {
+
+  /**
+   * The custom post type type slug
+   *
+   * @var string
+   */
+   const POST_TYPE_SLUG = 'faq';
+
+  /**
+   * The custom post type menu icon
+   *
+   * @var string
+   */
+   const MENU_ICON = 'dashicons-list-view';
+
+  /**
+   * Get the slug to use for the custom post type.
+   *
+   * @return string Custom post type slug.
+   */
+  protected function get_post_type_slug() : string {
+    return self::POST_TYPE_SLUG;
+  }
+
+  /**
+   * Get the arguments that configure the custom post type.
+   *
+   * @return array Array of arguments.
+   */
+  protected function get_post_type_arguments() : array {
+    $nouns = [
+      Label_Generator::SINGULAR_NAME_UC => esc_html_x( 'FAQ', 'post type upper case singular name', 'eightshift-libs' ),
+      Label_Generator::SINGULAR_NAME_LC => esc_html_x( 'faq', 'post type lower case singular name', 'eightshift-libs' ),
+      Label_Generator::PLURAL_NAME_UC   => esc_html_x( 'FAQs', 'post type upper case plural name', 'eightshift-libs' ),
+      Label_Generator::PLURAL_NAME_LC   => esc_html_x( 'faqs', 'post type lower case plural name', 'eightshift-libs' ),
+    ];
+
+    return [
+      'label'              => $nouns[ Label_Generator::SINGULAR_NAME_UC ],
+      'labels'             => ( new Label_Generator() )->get_generated_labels( $nouns ),
+      'public'             => true,
+      'menu_position'      => 50,
+      'menu_icon'          => self::MENU_ICON,
+      'supports'           => array( 'title', 'revisions', 'editor' ),
+      'has_archive'        => false,
+      'show_in_rest'       => true,
+      'publicly_queryable' => true,
+      'capability_type'    => 'page',
+      'map_meta_cap'       => true,
+      'can_export'         => true,
+    ];
+  }
+}
diff --git a/examples/admin/class-register-taxonomy.php b/examples/admin/class-register-taxonomy.php
new file mode 100644
index 000000000..1c8c94924
--- /dev/null
+++ b/examples/admin/class-register-taxonomy.php
@@ -0,0 +1,77 @@
+<?php
+/**
+ * File that holds taxonomy class for fax taxonomy registration
+ *
+ * @since 1.0.0
+ * @package Custom_Namespace\Admin
+ */
+
+namespace Custom_Namespace\Admin;
+
+use Eightshift_Libs\Custom_Taxonomy\Base_Taxonomy;
+use Eightshift_Libs\Custom_Post_Type\Label_Generator;
+
+use Custom_Namespace\Admin\Faq;
+
+/**
+ * Class Faq_Taxonomy.
+ *
+ * @since 1.0.0
+ */
+class Faq_Taxonomy extends Base_Taxonomy {
+  /**
+   * The systems custom taxonomy type slug
+   *
+   * @var string
+   */
+   const TAXONOMY_SLUG = 'faq-category';
+
+  /**
+   * The custom post type type slug
+   *
+   * @var string
+   */
+   const POST_TYPE_SLUG = Faq::POST_TYPE_SLUG;
+
+  /**
+   * Get the slug of the custom taxonomy
+   *
+   * @return string Custom taxonomy slug.
+   */
+  protected function get_taxonomy_slug() : string {
+    return self::TAXONOMY_SLUG;
+  }
+
+  /**
+   * Get the post type slug to use the taxonomy to
+   *
+   * @return string Custom post type slug.
+   */
+  protected function get_post_type_slug() : string {
+    return self::POST_TYPE_SLUG;
+  }
+
+  /**
+   * Get the arguments that configure the custom taxonomy.
+   *
+   * @return array Array of arguments.
+   */
+  protected function get_taxonomy_arguments() : array {
+    $nouns = [
+      Label_Generator::SINGULAR_NAME_UC => esc_html_x( 'FAQ category', 'post type upper case singular name', 'eighshift-libs' ),
+      Label_Generator::SINGULAR_NAME_LC => esc_html_x( 'faq category', 'post type lower case singular name', 'eighshift-libs' ),
+      Label_Generator::PLURAL_NAME_UC   => esc_html_x( 'FAQ categories', 'post type upper case plural name', 'eighshift-libs' ),
+      Label_Generator::PLURAL_NAME_LC   => esc_html_x( 'faq categories', 'post type lower case plural name', 'eighshift-libs' ),
+    ];
+
+    return [
+      'label'              => $nouns[ Label_Generator::SINGULAR_NAME_UC ],
+      'labels'             => ( new Label_Generator() )->get_generated_labels( $nouns ),
+      'hierarchical'          => true,
+      'show_ui'               => true,
+      'show_admin_column'     => true,
+      'update_count_callback' => '_update_post_term_count',
+      'query_var'             => true,
+    ];
+  }
+}
diff --git a/examples/blocks/heading/class-heading.php b/examples/blocks/heading/class-heading.php
new file mode 100644
index 000000000..c259d09e8
--- /dev/null
+++ b/examples/blocks/heading/class-heading.php
@@ -0,0 +1,51 @@
+<?php
+/**
+ * All info regarding the Heading block
+ *
+ * @since 1.0.0
+ * @package Custom_Namespace\Blocks\Heading
+ */
+
+namespace Custom_Namespace\Blocks\Heading;
+
+use Eightshift_Libs\Blocks\Base_Block;
+
+/**
+ * Class Heading
+ */
+class Heading extends Base_Block {
+
+  /**
+   * Block's name.
+   *
+   * @since 1.0.0
+   */
+  const NAME = 'heading';
+
+  /**
+   * Get block attributes assigned inside block class.
+   *
+   * @return array
+   *
+   * @since 1.0.0
+   */
+  public function get_block_attributes() : array {
+    return array(
+      'content' => array(
+        'type' => parent::TYPE_STRING,
+      ),
+      'level' => array(
+        'type' => parent::TYPE_NUMBER,
+        'default' => '2',
+      ),
+      'styleAlign' => array(
+        'type' => parent::TYPE_STRING,
+        'default' => 'center',
+      ),
+      'styleSize' => array(
+        'type' => parent::TYPE_STRING,
+        'default' => 'huge',
+      ),
+    );
+  }
+}
diff --git a/examples/includes/class-main.php b/examples/includes/class-main.php
new file mode 100644
index 000000000..771cf621b
--- /dev/null
+++ b/examples/includes/class-main.php
@@ -0,0 +1,41 @@
+<?php
+/**
+ * The file that defines the main start class
+ *
+ * A class definition that includes attributes and functions used across both the
+ * theme-facing side of the site and the admin area.
+ *
+ * @since   1.0.0
+ * @package Custom_Namespace\Includes
+ */
+
+namespace Custom_Namespace\Includes;
+
+use Eightshift_Libs\Core\Main as LibMain;
+
+use Custom_Namespace\Admin;
+
+/**
+ * The main start class.
+ *
+ * This is used to define admin-specific hooks, and
+ * theme-facing site hooks.
+ *
+ * Also maintains the unique identifier of this theme as well as the current
+ * version of the theme.
+ */
+class Main extends LibMain {
+
+  /**
+   * Get the list of services to register.
+   *
+   * A list of classes which contain hooks.
+   *
+   * @return array<string> Array of fully qualified class names.
+   */
+  protected function get_service_classes() : array {
+    return [
+      Admin\Admin::class,
+    ];
+  }
+}
diff --git a/phpcs.xml.dist b/phpcs.xml.dist
new file mode 100644
index 000000000..4441c7318
--- /dev/null
+++ b/phpcs.xml.dist
@@ -0,0 +1,22 @@
+<?xml version="1.0"?>
+<ruleset name="Eightshift Library">
+  <description>Eightshift Library uses extended WordPress coding standards with some minor corections. TBD</description>
+
+  <rule ref="Infinum" />
+
+  <rule ref="Generic.CodeAnalysis.UnusedFunctionParameter.Found">
+    <severity>0</severity>
+  </rule>
+
+  <rule ref="WordPress.WP.GlobalVariablesOverride.OverrideProhibited">
+    <severity>0</severity>
+  </rule>
+
+  <rule ref="PHPCompatibility.FunctionDeclarations.NewParamTypeDeclarations.objectFound">
+    <severity>0</severity>
+  </rule>
+
+  <rule ref="Generic.CodeAnalysis.UnusedFunctionParameter.FoundInExtendedClassAfterLastUsed">
+    <severity>0</severity>
+  </rule>
+</ruleset>
diff --git a/phpunit.xml b/phpunit.xml
new file mode 100644
index 000000000..e69de29bb
diff --git a/src/blocks/class-attribute-type-enums.php b/src/blocks/class-attribute-type-enums.php
new file mode 100644
index 000000000..7eb51a564
--- /dev/null
+++ b/src/blocks/class-attribute-type-enums.php
@@ -0,0 +1,60 @@
+<?php
+/**
+ * File that holds all block attribute types used as enums.
+ *
+ * @since   1.0.0
+ * @package Eightshift_Libs\Blocks
+ */
+
+namespace Eightshift_Libs\Blocks;
+
+/**
+ * Class Attribute_Type_Enums
+ */
+abstract class Attribute_Type_Enums {
+
+  /**
+   * Type String Name.
+   *
+   * @var string
+   *
+   * @since 1.0.0
+   */
+  const TYPE_STRING = 'string';
+
+  /**
+   * Type Number Name.
+   *
+   * @var string
+   *
+   * @since 1.0.0
+   */
+  const TYPE_NUMBER = 'number';
+
+  /**
+   * Type Bool Name.
+   *
+   * @var string
+   *
+   * @since 1.0.0
+   */
+  const TYPE_BOOL = 'bool';
+
+  /**
+   * Type Array Name.
+   *
+   * @var string
+   *
+   * @since 1.0.0
+   */
+  const TYPE_ARRAY = 'array';
+
+  /**
+   * Type Object Name.
+   *
+   * @var string
+   *
+   * @since 1.0.0
+   */
+  const TYPE_OBJECT = 'object';
+}
diff --git a/src/blocks/class-base-block.php b/src/blocks/class-base-block.php
new file mode 100644
index 000000000..15bf47338
--- /dev/null
+++ b/src/blocks/class-base-block.php
@@ -0,0 +1,155 @@
+<?php
+/**
+ * File that holds base abstract class for Gutenberg blocks registration
+ *
+ * @since   1.0.0
+ * @package Eightshift_Libs\Blocks
+ */
+
+namespace Eightshift_Libs\Blocks;
+
+use Eightshift_Libs\Blocks\Block;
+use Eightshift_Libs\Core\Service;
+use Eightshift_Libs\Exception\Missing_Block_Name;
+
+/**
+ * Class Block
+ */
+abstract class Base_Block extends Attribute_Type_Enums implements Block {
+
+  /**
+   * Block Name.
+   *
+   * @var string
+   *
+   * @since 1.0.0
+   */
+  const NAME = 'abstract-block';
+
+  /**
+   * Namespace in which all our blocks exist.
+   *
+   * @var string
+   *
+   * @since 1.0.0
+   */
+  const BLOCK_NAMESPACE = 'eightshift';
+
+  /**
+   * Register all the hooks
+   *
+   * @since 1.0.0
+   */
+  public function register() : void {
+    add_action(
+      'init',
+      function() {
+        register_block_type(
+          static::BLOCK_NAMESPACE . '/' . static::NAME,
+          array(
+            'render_callback' => [ $this, 'render' ],
+            'attributes' => $this->get_attributes(),
+          )
+        );
+      }
+    );
+  }
+
+  /**
+   * Adds default attributes that are dynamically built for all blocks.
+   * These are:
+   * - blockName: Block's full name including namespace (example: infinum/heading)
+   * - rootClass: Block's root (base) BEM CSS class, built in "block/$name" format (example: block-heading)
+   * - jsClass:   Block's js selector class, built in "js-block-$name" format (example: js-block-heading)
+   *
+   * @throws \Exception On missing block name.
+   *
+   * @return array
+   *
+   * @since 1.0.0
+   */
+  public function get_default_attributes() : array {
+
+    // Make sure the class (block) extending this class (abstract Base_Block)
+    // has defined its own name.
+    if ( static::NAME === self::NAME ) {
+      throw Missing_Block::name_exception();
+    }
+
+    return [
+      'blockName' => array(
+        'type' => parent::TYPE_STRING,
+        'default' => self::BLOCK_NAMESPACE . '/' . static::NAME,
+      ),
+      'rootClass' => array(
+        'type' => parent::TYPE_STRING,
+        'default' => 'block-' . static::NAME,
+      ),
+      'jsClass' => array(
+        'type' => parent::TYPE_STRING,
+        'default' => 'js-block-' . static::NAME,
+      ),
+    ];
+  }
+
+  /**
+   * Get block attributes assigned inside block class.
+   *
+   * @return array
+   *
+   * @since 1.0.0
+   */
+  public function get_block_attributes() : array {
+    return [];
+  }
+
+  /**
+   * Get all block attributes. Default and block attributes.
+   *
+   * @return array
+   *
+   * @since 1.0.0
+   */
+  public function get_attributes() : array {
+    return array_merge( $this->get_default_attributes(), $this->get_block_attributes() );
+  }
+
+  /**
+   * Renders the block using a template in Infinum\Blocks\Templates namespace/folder.
+   * Template file must have the same name as the class-blockname file, for example:
+   *
+   *   Block:     class-heading.php
+   *   Template:  heading.php
+   *
+   * @param array  $attributes Array of attributes as defined in block's index.js.
+   * @param string $content    Block's content.
+   *
+   * @throws \Exception On missing attributes OR missing template.
+   * @echo   string
+   *
+   * @since 1.0.0
+   */
+  public function render( array $attributes, string $content ) : string {
+
+    // Block must have a defined name to find its template.
+    // Make sure the class (block) extending this class (abstract Base_Block)
+    // has defined its own name.
+    if ( static::NAME === self::NAME ) {
+      throw Missing_Block::name_exception();
+    }
+
+    $template_path = 'src/blocks/' . static::NAME . '/view/' . static::NAME . '.php';
+    $template      = locate_template( $template_path );
+
+    if ( empty( $template ) ) {
+      throw Missing_Block::view_exception( static::NAME, $template_path );
+    }
+
+    // If everything is ok, return the contents of the template (return, NOT echo).
+    ob_start();
+    include $template;
+    $output = ob_get_clean();
+    unset( $template );
+    return $output;
+  }
+}
diff --git a/src/blocks/interface-block.php b/src/blocks/interface-block.php
new file mode 100644
index 000000000..8fbc6ad91
--- /dev/null
+++ b/src/blocks/interface-block.php
@@ -0,0 +1,76 @@
+<?php
+/**
+ * Interface for blocks.
+ *
+ * @since   1.0.0
+ * @package Eightshift_Libs\Blocks
+ */
+
+namespace Eightshift_Libs\Blocks;
+
+/**
+ * Interface Block
+ */
+interface Block {
+
+  /**
+   * Register the current registrable.
+   *
+   * A register method holds the plugin action and filter hooks.
+   * Following the single responsibility principle, every class
+   * holds a functionality for a certain part of the plugin.
+   * This is why every class should hold its own hooks.
+   *
+   * @return void
+   *
+   * @since 1.0.0
+   */
+  public function register() : void;
+
+  /**
+   * Adds default attributes that are dynamically built for all blocks.
+   * These are:
+   * - blockName: Block's full name including namespace (example: Infinum/heading)
+   * - rootClass: Block's root (base) BEM CSS class, built in "block/$name" format (example: block-heading)
+   * - jsClass:   Block's js selector class, built in "js-block-$name" format (example: js-block-heading)
+   *
+   * @return array
+   *
+   * @since 1.0.0
+   */
+  public function get_default_attributes() : array;
+
+  /**
+   * Get block attributes assigned inside block class.
+   *
+   * @return array
+   *
+   * @since 1.0.0
+   */
+  public function get_block_attributes() : array;
+
+  /**
+   * Get all block attributes. Default and block attributes.
+   *
+   * @return array
+   *
+   * @since 1.0.0
+   */
+  public function get_attributes() : array;
+
+  /**
+   * Renders the block using a template in Infinum\Blocks\Templates namespace/folder.
+   * Template file must have the same name as the class-blockname file, for example:
+   *
+   *   Block:     class-heading.php
+   *   Template:  heading.php
+   *
+   * @param array  $attributes Array of attributes as defined in block's index.js.
+   * @param string $content    Block's content.
+   *
+   * @echo string
+   *
+   * @since 1.0.0
+   */
+  public function render( array $attributes, string $content ) : string;
+}
diff --git a/src/class-main.php b/src/class-main.php
new file mode 100644
index 000000000..70a37b510
--- /dev/null
+++ b/src/class-main.php
@@ -0,0 +1,148 @@
+<?php
+/**
+ * File containing the main intro class
+ *
+ * @since   1.0.0
+ * @package Eightshift_Libs\Core
+ */
+
+namespace Eightshift_Libs\Core;
+
+use Eightshift_Libs\Exception;
+
+/**
+ * The main start class.
+ *
+ * This is used to define admin-specific hooks, and
+ * theme-facing site hooks.
+ *
+ * Also maintains the unique identifier of this theme as well as the current
+ * version of the theme.
+ */
+abstract class Main implements Service {
+
+  /**
+   * Array of instantiated services.
+   *
+   * @var Service[]
+   */
+  private $services = [];
+
+  /**
+   * Register the plugin with the WordPress system.
+   *
+   * The register_service method will call the register() method in every service class,
+   * which holds the actions and filters - effectively replacing the need to manually add
+   * themn in one place.
+   *
+   * @throws Exception\Invalid_Service If a service is not valid.
+   *
+   * @return void
+   *
+   * @since 1.0.0
+   */
+  public function register() : void {
+
+    add_action( 'after_setup_theme', [ $this, 'register_services' ] );
+
+    $this->register_assets_manifest_data();
+  }
+
+  /**
+   * Register the individual services of this plugin.
+   *
+   * @throws Exception\Invalid_Service If a service is not valid.
+   *
+   * @return void
+   *
+   * @since 1.0.0
+   */
+  public function register_services() : void {
+
+    // Bail early so we don't instantiate services twice.
+    if ( ! empty( $this->services ) ) {
+      return;
+    }
+
+    $classes = $this->get_service_classes();
+
+    $this->services = array_map(
+      [ $this, 'instantiate_service' ],
+      $classes
+    );
+    array_walk(
+      $this->services,
+      function( Service $service ) {
+        $service->register();
+      }
+    );
+  }
+
+  /**
+   * Provide menifest json url location.
+   *
+   * @return string
+   *
+   * @since 1.0.0
+   */
+  protected function get_manifest_url() : string {
+    return get_template_directory() . '/skin/public/manifest.json';
+  }
+
+  /**
+   * Register bundled asset manifest
+   *
+   * @throws Exception\Missing_Manifest Throws error if manifest is missing.
+   *
+   * @return void
+   *
+   * @since 1.0.0
+   */
+  public function register_assets_manifest_data() : void {
+
+    $manifest = $this->get_manifest_url();
+    if ( ! file_exists( $manifest ) ) {
+      $error_message = esc_html__( 'manifest.json is missing. Bundle the theme before using it.', 'developer-portal' );
+      throw Exception\Missing_Manifest::message( $error_message );
+    }
+
+    define( 'INF_ASSETS_MANIFEST', implode( ' ', file( $manifest ) ) );
+  }
+
+  /**
+   * Instantiate a single service.
+   *
+   * @param string $class Service class to instantiate.
+   *
+   * @throws Exception\Invalid_Service If the service is not valid.
+   *
+   * @return Service
+   *
+   * @since 1.0.0
+   */
+  private function instantiate_service( $class ) {
+    if ( ! class_exists( $class ) ) {
+      throw Exception\Invalid_Service::from_service( $class );
+    }
+
+    $service = new $class();
+    if ( ! $service instanceof Service ) {
+      throw Exception\Invalid_Service::from_service( $service );
+    }
+
+    return $service;
+  }
+
+  /**
+   * Get the list of services to register.
+   *
+   * A list of classes which contain hooks.
+   *
+   * @return array<string> Array of fully qualified class names.
+   *
+   * @since 1.0.0
+   */
+  protected function get_service_classes() : array {
+    return [];
+  }
+}
diff --git a/src/custom-post-type/class-base-post-type.php b/src/custom-post-type/class-base-post-type.php
new file mode 100644
index 000000000..e22dbfdf8
--- /dev/null
+++ b/src/custom-post-type/class-base-post-type.php
@@ -0,0 +1,51 @@
+<?php
+/**
+ * File that holds base abstract class for custom post type registration
+ *
+ * @since   1.0.0
+ * @package Eightshift_Libs\Custom_Post_Type
+ */
+
+namespace Eightshift_Libs\Custom_Post_Type;
+
+use Eightshift_Libs\Core\Service;
+
+/**
+ * Abstract class Base_Post_Type.
+ */
+abstract class Base_Post_Type implements Service {
+
+  /**
+   * Register custom post type and taxonomy.
+   *
+   * @return void
+   *
+   * @since 1.0.0
+   */
+  public function register() : void {
+    add_action(
+      'init',
+      function() {
+        register_post_type( $this->get_post_type_slug(), $this->get_post_type_arguments() );
+      }
+    );
+  }
+
+  /**
+   * Get the slug to use for the custom post type.
+   *
+   * @return string Custom post type slug.
+   *
+   * @since 1.0.0
+   */
+  abstract protected function get_post_type_slug() : string;
+
+  /**
+   * Get the arguments that configure the custom post type.
+   *
+   * @return array Array of arguments.
+   *
+   * @since 1.0.0
+   */
+  abstract protected function get_post_type_arguments() : array;
+}
diff --git a/src/custom-post-type/class-label-generator.php b/src/custom-post-type/class-label-generator.php
new file mode 100644
index 000000000..20ffd69c5
--- /dev/null
+++ b/src/custom-post-type/class-label-generator.php
@@ -0,0 +1,159 @@
+<?php
+/**
+ * File containing label generator class
+ *
+ * Original author: https://github.com/schlessera/wcbtn-2018-api/blob/master/src/CustomPostType/LabelGenerator.php
+ *
+ * @since   1.0.0
+ * @package Eightshift_Libs\Custom_Post_Type
+ */
+
+namespace Eightshift_Libs\Custom_Post_Type;
+
+use Eightshift_Libs\Exception\Invalid_Nouns;
+
+/**
+ * Class that generates lables for custom post type
+ */
+final class Label_Generator {
+
+  /**
+   * Singular name UC Constant
+   *
+   * @var string
+   *
+   * @since 1.0.0
+   */
+  const SINGULAR_NAME_UC = 'singular_name_uc';
+
+  /**
+   * Singular name LC Constant
+   *
+   * @var string
+   *
+   * @since 1.0.0
+   */
+  const SINGULAR_NAME_LC = 'singular_name_lc';
+
+  /**
+   * Plural name UC Constant
+   *
+   * @var string
+   *
+   * @since 1.0.0
+   */
+  const PLURAL_NAME_UC = 'plural_name_uc';
+
+  /**
+   * Plural name LC Constant
+   *
+   * @var string
+   *
+   * @since 1.0.0
+   */
+  const PLURAL_NAME_LC = 'plural_name_lc';
+
+  /**
+   * Requiered Nons Constant
+   *
+   * @var string
+   *
+   * @since 1.0.0
+   */
+  const REQUIRED_NOUNS = [
+    self::SINGULAR_NAME_UC,
+    self::SINGULAR_NAME_LC,
+    self::PLURAL_NAME_UC,
+    self::PLURAL_NAME_LC,
+  ];
+
+  /**
+   * Get automatically generated labels from a singular and an optional
+   * plural noun.
+   *
+   * @param array $nouns Array of nouns to use for the labels.
+   *
+   * @return string[] array Array of labels.
+   * @throws Invalid_Nouns Invalid nouns exception.
+   *
+   * @since 1.0.0
+   */
+  public function get_generated_labels( array $nouns ) : array {
+
+    foreach ( self::REQUIRED_NOUNS as $noun_key ) {
+      if ( ! array_key_exists( $noun_key, $nouns ) ) {
+        throw Invalid_Nouns::from_key( $noun_key );
+      }
+    }
+
+    $label_templates = [
+      /* Translators: %1$s uc singular, %2$s lc singular, %3$s uc plural, %4$s lc plural. */
+      'name'                  => esc_html_x( '%3$s', 'Post Type General Name', 'developer-portal' ), /* phpcs:disable */
+      /* Translators: %1$s uc singular, %2$s lc singular, %3$s uc plural, %4$s lc plural. */
+      'singular_name'         => esc_html_x( '%1$s', 'Post Type Singular Name', 'developer-portal' ), /* phpcs:disable */
+      /* Translators: %1$s uc singular, %2$s lc singular, %3$s uc plural, %4$s lc plural. */
+      'menu_name'             => esc_html__( '%3$s', 'developer-portal' ), /* phpcs:disable */
+      /* Translators: %1$s uc singular, %2$s lc singular, %3$s uc plural, %4$s lc plural. */
+      'name_admin_bar'        => esc_html__( '%1$s', 'developer-portal' ), /* phpcs:disable */
+      /* Translators: %1$s uc singular, %2$s lc singular, %3$s uc plural, %4$s lc plural. */
+      'archives'              => esc_html__( '%1$s Archives', 'developer-portal' ),
+      /* Translators: %1$s uc singular, %2$s lc singular, %3$s uc plural, %4$s lc plural. */
+      'attributes'            => esc_html__( '%1$s Attributes', 'developer-portal' ),
+      /* Translators: %1$s uc singular, %2$s lc singular, %3$s uc plural, %4$s lc plural. */
+      'parent_item_colon'     => esc_html__( 'Parent %1$s:', 'developer-portal' ),
+      /* Translators: %1$s uc singular, %2$s lc singular, %3$s uc plural, %4$s lc plural. */
+      'all_items'             => esc_html__( 'All %3$s', 'developer-portal' ),
+      /* Translators: %1$s uc singular, %2$s lc singular, %3$s uc plural, %4$s lc plural. */
+      'add_new_item'          => esc_html__( 'Add New %1$s', 'developer-portal' ),
+      /* Translators: %1$s uc singular, %2$s lc singular, %3$s uc plural, %4$s lc plural. */
+      'add_new'               => esc_html__( 'Add New', 'developer-portal' ),
+      /* Translators: %1$s uc singular, %2$s lc singular, %3$s uc plural, %4$s lc plural. */
+      'new_item'              => esc_html__( 'New %1$s', 'developer-portal' ),
+      /* Translators: %1$s uc singular, %2$s lc singular, %3$s uc plural, %4$s lc plural. */
+      'edit_item'             => esc_html__( 'Edit %1$s', 'developer-portal' ),
+      /* Translators: %1$s uc singular, %2$s lc singular, %3$s uc plural, %4$s lc plural. */
+      'update_item'           => esc_html__( 'Update %1$s', 'developer-portal' ),
+      /* Translators: %1$s uc singular, %2$s lc singular, %3$s uc plural, %4$s lc plural. */
+      'view_item'             => esc_html__( 'View %1$s', 'developer-portal' ),
+      /* Translators: %1$s uc singular, %2$s lc singular, %3$s uc plural, %4$s lc plural. */
+      'view_items'            => esc_html__( 'View %3$s', 'developer-portal' ),
+      /* Translators: %1$s uc singular, %2$s lc singular, %3$s uc plural, %4$s lc plural. */
+      'search_items'          => esc_html__( 'Search %1$s', 'developer-portal' ),
+      /* Translators: %1$s uc singular, %2$s lc singular, %3$s uc plural, %4$s lc plural. */
+      'not_found'             => esc_html__( 'Not found', 'developer-portal' ),
+      /* Translators: %1$s uc singular, %2$s lc singular, %3$s uc plural, %4$s lc plural. */
+      'not_found_in_trash'    => esc_html__( 'Not found in Trash', 'developer-portal' ),
+      /* Translators: %1$s uc singular, %2$s lc singular, %3$s uc plural, %4$s lc plural. */
+      'featured_image'        => esc_html__( 'Featured Image', 'developer-portal' ),
+      /* Translators: %1$s uc singular, %2$s lc singular, %3$s uc plural, %4$s lc plural. */
+      'set_featured_image'    => esc_html__( 'Set featured image', 'developer-portal' ),
+      /* Translators: %1$s uc singular, %2$s lc singular, %3$s uc plural, %4$s lc plural. */
+      'remove_featured_image' => esc_html__( 'Remove featured image', 'developer-portal' ),
+      /* Translators: %1$s uc singular, %2$s lc singular, %3$s uc plural, %4$s lc plural. */
+      'use_featured_image'    => esc_html__( 'Use as featured image', 'developer-portal' ),
+      /* Translators: %1$s uc singular, %2$s lc singular, %3$s uc plural, %4$s lc plural. */
+      'insert_into_item'      => esc_html__( 'Insert into %2$s', 'developer-portal' ),
+      /* Translators: %1$s uc singular, %2$s lc singular, %3$s uc plural, %4$s lc plural. */
+      'uploaded_to_this_item' => esc_html__( 'Uploaded to this %2$s', 'developer-portal' ),
+      /* Translators: %1$s uc singular, %2$s lc singular, %3$s uc plural, %4$s lc plural. */
+      'items_list'            => esc_html__( '%3$s list', 'developer-portal' ),
+      /* Translators: %1$s uc singular, %2$s lc singular, %3$s uc plural, %4$s lc plural. */
+      'items_list_navigation' => esc_html__( '%3$s list navigation', 'developer-portal' ),
+      /* Translators: %1$s uc singular, %2$s lc singular, %3$s uc plural, %4$s lc plural. */
+      'filter_items_list'     => esc_html__( 'Filter %4$s list', 'developer-portal' ),
+    ];
+
+    return array_map(
+    function( $label ) use ( $nouns ) {
+      return sprintf(
+        $label,
+        $nouns[ self::SINGULAR_NAME_UC ],
+        $nouns[ self::SINGULAR_NAME_LC ],
+        $nouns[ self::PLURAL_NAME_UC ],
+        $nouns[ self::PLURAL_NAME_LC ]
+      );
+    },
+    $label_templates
+    );
+  }
+}
diff --git a/src/custom-taxonomy/class-base-taxonomy.php b/src/custom-taxonomy/class-base-taxonomy.php
new file mode 100644
index 000000000..0db369850
--- /dev/null
+++ b/src/custom-taxonomy/class-base-taxonomy.php
@@ -0,0 +1,66 @@
+<?php
+/**
+ * File that holds base abstract class for custom taxonomy registration
+ *
+ * @since   1.0.0
+ * @package Eightshift_Libs\Custom_Taxonomy
+ */
+
+namespace Eightshift_Libs\Custom_Taxonomy;
+
+use Eightshift_Libs\Core\Service;
+
+/**
+ * Abstract class Base_Taxonomy.
+ *
+ * @since 1.0.0
+ */
+abstract class Base_Taxonomy implements Service {
+
+  /**
+   * Register custom taxonomy.
+   *
+   * @return void
+   *
+   * @since 1.0.0
+   */
+  public function register() : void {
+    add_action(
+      'init',
+      function() {
+        register_taxonomy(
+          $this->get_taxonomy_slug(),
+          [ $this->get_post_type_slug() ],
+          $this->get_taxonomy_arguments()
+        );
+      }
+    );
+  }
+
+  /**
+   * Get the slug of the custom taxonomy
+   *
+   * @return string Custom taxonomy slug.
+   *
+   * @since 1.0.0
+   */
+  abstract protected function get_taxonomy_slug() : string;
+
+  /**
+   * Get the post type slug to use the taxonomy to
+   *
+   * @return string Custom post type slug.
+   *
+   * @since 1.0.0
+   */
+  abstract protected function get_post_type_slug() : string;
+
+  /**
+   * Get the arguments that configure the custom taxonomy.
+   *
+   * @return array Array of arguments.
+   *
+   * @since 1.0.0
+   */
+  abstract protected function get_taxonomy_arguments() : array;
+}
diff --git a/src/exception/class-failed-to-load-view.php b/src/exception/class-failed-to-load-view.php
new file mode 100644
index 000000000..2a6e3b038
--- /dev/null
+++ b/src/exception/class-failed-to-load-view.php
@@ -0,0 +1,37 @@
+<?php
+/**
+ * File containing failed to load view class
+ *
+ * @since   1.0.0
+ * @package Eightshift_Libs\Exception
+ */
+
+namespace Eightshift_Libs\Exception;
+
+/**
+ * Class Failed_To_Load_View.
+ */
+class Failed_To_Load_View extends \RuntimeException implements General_Exception {
+
+  /**
+   * Create a new instance of the exception if the view file itself created
+   * an exception.
+   *
+   * @param string     $uri       URI of the file that is not accessible or
+   *                              not readable.
+   * @param \Exception $exception Exception that was thrown by the view file.
+   *
+   * @return static
+   *
+   * @since 1.0.0
+   */
+  public static function view_exception( $uri, $exception ) {
+    $message = sprintf(
+      esc_html__( 'Could not load the View URI: %1$s. Reason: %2$s.', 'eightshift-libs' ),
+      $uri,
+      $exception->getMessage()
+    );
+
+    return new static( $message, $exception->getCode(), $exception );
+  }
+}
diff --git a/src/exception/class-invalid-callback.php b/src/exception/class-invalid-callback.php
new file mode 100644
index 000000000..4a400ace1
--- /dev/null
+++ b/src/exception/class-invalid-callback.php
@@ -0,0 +1,36 @@
+<?php
+/**
+ * File containing the invalid callback exception class
+ *
+ * @since   1.0.0
+ * @package Eightshift_Libs\Exception
+ */
+
+namespace Eightshift_Libs\Exception;
+
+/**
+ * Class Invalid_Callback.
+ */
+class Invalid_Callback extends \InvalidArgumentException implements General_Exception {
+
+  /**
+   * Create a new instance of the exception for a callback class name that is
+   * not recognized.
+   *
+   * @param string $callback Class name of the callback that was not recognized.
+   *
+   * @return static
+   *
+   * @since 1.0.0
+   */
+  public static function from_callback( $callback ) {
+    $message = sprintf(
+      esc_html__( 'The callback %s is not recognized and cannot be registered.', 'eightshift-libs' ),
+      is_object( $callback )
+        ? get_class( $callback )
+        : (string) $callback
+    );
+
+    return new static( $message );
+  }
+}
diff --git a/src/exception/class-invalid-nouns.php b/src/exception/class-invalid-nouns.php
new file mode 100644
index 000000000..c1256b0cd
--- /dev/null
+++ b/src/exception/class-invalid-nouns.php
@@ -0,0 +1,34 @@
+<?php
+/**
+ * File containing invalid nouns exception
+ *
+ * @since   1.0.0
+ * @package Eightshift_Libs\Exception
+ */
+
+namespace Eightshift_Libs\Exception;
+
+/**
+ * Class Invalid_Nouns.
+ */
+class Invalid_Nouns extends \InvalidArgumentException implements General_Exception {
+
+  /**
+   * Create a new instance of the exception for an array of nouns that is
+   * missing a required key.
+   *
+   * @param string $key Asset handle that is not valid.
+   *
+   * @return static
+   *
+   * @since 1.0.0
+   */
+  public static function from_key( string $key ) {
+    $message = sprintf(
+      esc_html__( 'The array of nouns passed into the Label_Generator is missing the %s noun.', 'eightshift-libs' ),
+      $key
+    );
+
+    return new static( $message );
+  }
+}
diff --git a/src/exception/class-invalid-service.php b/src/exception/class-invalid-service.php
new file mode 100644
index 000000000..e36095435
--- /dev/null
+++ b/src/exception/class-invalid-service.php
@@ -0,0 +1,36 @@
+<?php
+/**
+ * File containing the invalid service exception class
+ *
+ * @since   1.0.0
+ * @package Eightshift_Libs\Exception
+ */
+
+namespace Eightshift_Libs\Exception;
+
+/**
+ * Class Invalid_Service.
+ */
+class Invalid_Service extends \InvalidArgumentException implements General_Exception {
+
+  /**
+   * Create a new instance of the exception for a service class name that is
+   * not recognized.
+   *
+   * @param string $service Class name of the service that was not recognized.
+   *
+   * @return static
+   *
+   * @since 1.0.0
+   */
+  public static function from_service( $service ) {
+    $message = sprintf(
+      esc_html__( 'The service %s is not recognized and cannot be registered.', 'eightshift-libs' ),
+      is_object( $service )
+        ? get_class( $service )
+        : (string) $service
+    );
+
+    return new static( $message );
+  }
+}
diff --git a/src/exception/class-missing-block.php b/src/exception/class-missing-block.php
new file mode 100644
index 000000000..97b527ace
--- /dev/null
+++ b/src/exception/class-missing-block.php
@@ -0,0 +1,48 @@
+<?php
+/**
+ * File containing invalid Gutenberg Block exception
+ *
+ * @since   1.0.0
+ * @package Eightshift_Libs\Exception
+ */
+
+namespace Eightshift_Libs\Exception;
+
+/**
+ * Class Missing_Block.
+ */
+class Missing_Block extends \InvalidArgumentException implements General_Exception {
+
+  /**
+   * Create a new instance of the exception for an missing block name.
+   *
+   * @return static
+   *
+   * @since 1.0.0
+   */
+  public static function name_exception() {
+    $message = esc_html_e( 'Missing Block Name', 'eightshift-libs' );
+
+    return new static( $message );
+  }
+
+  /**
+   * Create a new instance of the exception for an missing block view.
+   *
+   * @param string $name Block name.
+   * @param string $path Path to block on disk.
+   *
+   * @return static
+   *
+   * @since 1.0.0
+   */
+  public static function view_exception( string $name, string $path ) {
+    $message = sprintf(
+      esc_html__( 'Missing view template for block called: %1$s | Expecting a template in path: %2$s', 'eightshift-libs' ),
+      $name,
+      $path
+    );
+
+    return new static( $message );
+  }
+}
diff --git a/src/exception/class-missing-manifest.php b/src/exception/class-missing-manifest.php
new file mode 100644
index 000000000..1b346ea88
--- /dev/null
+++ b/src/exception/class-missing-manifest.php
@@ -0,0 +1,30 @@
+<?php
+/**
+ * File containing the failure exception class when assets aren't bundled
+ *
+ * @since   1.0.0
+ * @package Eightshift_Libs\Exception
+ */
+
+namespace Eightshift_Libs\Exception;
+
+/**
+ * Class Plugin_Activation_Failure.
+ */
+class Missing_Manifest extends \InvalidArgumentException implements General_Exception {
+
+  /**
+   * Create a new instance of the exception in case
+   * a manifest file is missing.
+   *
+   * @param string $message Error message to show on
+   *                        thrown exception.
+   *
+   * @return static
+   *
+   * @since 1.0.0
+   */
+  public static function message( $message ) {
+    return new static( $message );
+  }
+}
diff --git a/src/exception/general-exception-interface.php b/src/exception/general-exception-interface.php
new file mode 100644
index 000000000..c5db6146b
--- /dev/null
+++ b/src/exception/general-exception-interface.php
@@ -0,0 +1,19 @@
+<?php
+/**
+ * File containing general exception interface
+ *
+ * @since   1.0.0
+ * @package Eightshift_Libs\Exception
+ */
+
+namespace Eightshift_Libs\Exception;
+
+/**
+ * Interface General_Exception.
+ *
+ * This interface is implemented by all portal exceptions, so that we can
+ * catch "internal" exceptions only.
+ */
+interface General_Exception {
+
+}
diff --git a/src/interface-registrable.php b/src/interface-registrable.php
new file mode 100644
index 000000000..05d4c7ed4
--- /dev/null
+++ b/src/interface-registrable.php
@@ -0,0 +1,31 @@
+<?php
+/**
+ * File that holds the registrable interface.
+ *
+ * @since   1.0.0
+ * @package Eightshift_Libs\Core
+ */
+
+namespace Eightshift_Libs\Core;
+
+/**
+ * Interface Registrable.
+ *
+ * An object that can be registered.
+ */
+interface Registrable {
+
+  /**
+   * Register the current registrable.
+   *
+   * A register method holds the plugin action and filter hooks.
+   * Following the single responsibility principle, every class
+   * holds a functionality for a certain part of the plugin.
+   * This is why every class should hold its own hooks.
+   *
+   * @return void
+   *
+   * @since 1.0.0
+   */
+  public function register() : void;
+}
diff --git a/src/interface-renderable.php b/src/interface-renderable.php
new file mode 100644
index 000000000..fc40dbf6d
--- /dev/null
+++ b/src/interface-renderable.php
@@ -0,0 +1,28 @@
+<?php
+/**
+ * File that holds the renderable interface.
+ *
+ * @since   1.0.0
+ * @package Eightshift_Libs\Core
+ */
+
+namespace Eightshift_Libs\Core;
+
+/**
+ * Interface Renderable.
+ *
+ * An object that can be rendered.
+ */
+interface Renderable {
+
+  /**
+   * Render the current Renderable.
+   *
+   * @param array $context Context in which to render.
+   *
+   * @return string Rendered HTML.
+   *
+   * @since 1.0.0
+   */
+  public function render( array $context = [] ) : string;
+}
diff --git a/src/interface-service.php b/src/interface-service.php
new file mode 100644
index 000000000..22d396ebb
--- /dev/null
+++ b/src/interface-service.php
@@ -0,0 +1,17 @@
+<?php
+/**
+ * File that holds Has_Activation interface
+ *
+ * @since   1.0.0
+ * @package Eightshift_Libs\Core
+ */
+
+namespace Eightshift_Libs\Core;
+
+/**
+ * Interface Service.
+ *
+ * A generic service. Service is a part of the plugin functionality.
+ */
+interface Service extends Registrable {
+}
diff --git a/src/rest-routes/interface-callable-field.php b/src/rest-routes/interface-callable-field.php
new file mode 100644
index 000000000..df8b9a625
--- /dev/null
+++ b/src/rest-routes/interface-callable-field.php
@@ -0,0 +1,31 @@
+<?php
+/**
+ * File containing field callable interface
+ *
+ * @since   1.0.0
+ * @package Eightshift_Libs\Routes
+ */
+
+namespace Eightshift_Libs\Routes;
+
+/**
+ * Field interface that adds/extends fields in routes
+ */
+interface Callable_Field {
+
+  /**
+   * Method that returns rest response
+   *
+   * @param  object $object      Post or custom post type object of the request.
+   * @param  string $attr        Rest field/attr string identifier from the second parameter of your register_rest_field() declaration.
+   * @param  object $request     Full request payload – as a WP_REST_Request object.
+   * @param  string $object_type The object type which the field is registered against. Typically first parameter of your register_rest_field() declaration.
+   *
+   * @return mixed          If response generated an error, WP_Error, if response
+   *                        is already an instance, WP_HTTP_Response, otherwise
+   *                        returns a new WP_REST_Response instance.
+   *
+   * @since 1.0.0
+   */
+  public function field_callback( object $object, string $attr, object $request, string $object_type );
+}
diff --git a/src/rest-routes/interface-callable-rest.php b/src/rest-routes/interface-callable-rest.php
new file mode 100644
index 000000000..d582aba4d
--- /dev/null
+++ b/src/rest-routes/interface-callable-rest.php
@@ -0,0 +1,28 @@
+<?php
+/**
+ * File containing rest callable interface
+ *
+ * @since   1.0.0
+ * @package Eightshift_Libs\Routes
+ */
+
+namespace Eightshift_Libs\Routes;
+
+/**
+ * Route interface that adds routes
+ */
+interface Callable_Rest {
+
+  /**
+   * Method that returns rest response
+   *
+   * @param  \WP_REST_Request $request Data got from enpoint url.
+   *
+   * @return WP_REST_Response|mixed If response generated an error, WP_Error, if response
+   *                                is already an instance, WP_HTTP_Response, otherwise
+   *                                returns a new WP_REST_Response instance.
+   *
+   * @since 1.0.0
+   */
+  public function rest_callback( \WP_REST_Request $request );
+}
diff --git a/src/rest-routes/interface-field.php b/src/rest-routes/interface-field.php
new file mode 100644
index 000000000..24d930ddd
--- /dev/null
+++ b/src/rest-routes/interface-field.php
@@ -0,0 +1,26 @@
+<?php
+/**
+ * File containing type interface
+ *
+ * @since   1.0.0
+ * @package Eightshift_Libs\Routes
+ */
+
+namespace Eightshift_Libs\Routes;
+
+use Eightshift_Libs\Core\Service;
+
+/**
+ * Route interface that adds routes
+ */
+interface Field extends Service {
+
+  /**
+   * Method for adding custom routes
+   *
+   * @return void
+   *
+   * @since 1.0.0
+   */
+  public function register_field() : void;
+}
diff --git a/src/rest-routes/interface-route.php b/src/rest-routes/interface-route.php
new file mode 100644
index 000000000..40f23fdb1
--- /dev/null
+++ b/src/rest-routes/interface-route.php
@@ -0,0 +1,71 @@
+<?php
+/**
+ * File containing type interface
+ *
+ * @since   1.0.0
+ * @package Eightshift_Libs\Routes
+ */
+
+namespace Eightshift_Libs\Routes;
+
+use Eightshift_Libs\Core\Service;
+
+/**
+ * Route interface that adds routes
+ */
+interface Route extends Service {
+
+  /**
+   * Alias for GET transport method.
+   *
+   * @var string
+   *
+   * @since 1.0.0
+   */
+  const READABLE = 'GET';
+
+  /**
+   * Alias for POST transport method.
+   *
+   * @var string
+   *
+   * @since 1.0.0
+   */
+  const CREATABLE = 'POST';
+
+    /**
+   * Alias for PATCH transport method.
+   *
+   * @var string
+   *
+   * @since 1.0.0
+   */
+  const EDITABLE = 'PATCH';
+
+  /**
+   * Alias for PUT transport method.
+   *
+   * @var string
+   *
+   * @since 1.0.0
+   */
+  const UPDATEABLE = 'PUT';
+
+  /**
+   * Alias for DELETE transport method.
+   *
+   * @var string
+   *
+   * @since 1.0.0
+   */
+  const DELETABLE = 'DELETE';
+
+  /**
+   * Method for adding custom routes
+   *
+   * @return void
+   *
+   * @since 1.0.0
+   */
+  public function register_route() : void;
+}
diff --git a/tests/.gitkeep b/tests/.gitkeep
new file mode 100644
index 000000000..e69de29bb