generated: '2026-08-13'
method: searched
source: >-
  registry.npmjs.org, repo.packagist.org and github.com/Yoast, queried
  unauthenticated on 2026-08-13
note: >-
  Yoast ships two very different families of package. The FIRST family is the
  JavaScript analysis + UI stack that the Yoast SEO plugin itself is built from and
  which third parties reuse to embed Yoast's content analysis (yoastseo, @yoast/*).
  The SECOND family is PHP: the plugin distributions themselves plus Yoast's widely
  reused developer tooling (yoast/phpunit-polyfills alone has 46M+ Composer installs).
  The only packages that are true API CLIENTS — the MyYoast provisioning clients — are
  published as git repositories rather than to a registry, so they carry version: null
  with a note; a consumer pinning them is pinning a git ref, not a release.
packages:
  # --- MyYoast Provisioning API clients (the only first-party API SDKs) ---
  - language: php
    registry: git
    name: yoast/subscription-api-php-client
    url: https://github.com/Yoast/subscription-api-php-client
    install: 'composer require yoast/subscription-api-php-client:*@dev  # via VCS repository entry'
    official: true
    version: null
    published: null
    api: MyYoast Provisioning API
    note: >-
      Checked and absent from Packagist (repo.packagist.org returns 404). Yoast's own
      README instructs installation via a composer "repositories" VCS entry pointing at
      the GitHub repo with constraint "*@dev", so the distribution is unpinned and floats
      to the default branch. Swagger Codegen output; declares API version 1.0.0.
  - language: javascript
    registry: git
    name: subscription-api-javascript-client
    url: https://github.com/Yoast/subscription-api-javascript-client
    install: 'npm install Yoast/subscription-api-javascript-client --save'
    official: true
    version: null
    published: null
    api: MyYoast Provisioning API
    note: >-
      Checked and absent from npm under both the plausible names. The README explicitly
      tells consumers to publish it themselves or install from git, so there is no
      published release to date. Swagger Codegen output; declares package version 1.0.0.

  # --- JavaScript content-analysis + UI stack ---
  - language: javascript
    registry: npm
    name: yoastseo
    url: https://www.npmjs.com/package/yoastseo
    install: npm install yoastseo
    official: true
    version: 3.6.0
    published: '2026-02-13'
    description: Yoast client-side content analysis
  - language: javascript
    registry: npm
    name: '@yoast/ui-library'
    url: https://www.npmjs.com/package/@yoast/ui-library
    install: npm install @yoast/ui-library
    official: true
    version: 4.5.0
    published: '2026-03-16'
    description: Yoast UI library
  - language: javascript
    registry: npm
    name: '@yoast/search-metadata-previews'
    url: https://www.npmjs.com/package/@yoast/search-metadata-previews
    install: npm install @yoast/search-metadata-previews
    official: true
    version: 3.0.0
    published: '2026-03-16'
    description: Google/social snippet preview components
  - language: javascript
    registry: npm
    name: '@yoast/replacement-variable-editor'
    url: https://www.npmjs.com/package/@yoast/replacement-variable-editor
    install: npm install @yoast/replacement-variable-editor
    official: true
    version: 2.0.0
    published: '2026-03-16'
    description: Editor for Yoast replacement variables
  - language: javascript
    registry: npm
    name: '@yoast/related-keyphrase-suggestions'
    url: https://www.npmjs.com/package/@yoast/related-keyphrase-suggestions
    install: npm install @yoast/related-keyphrase-suggestions
    official: true
    version: 0.4.0
    published: '2026-03-16'
    description: Yoast related keyphrase suggestions package
  - language: javascript
    registry: npm
    name: '@yoast/components'
    url: https://www.npmjs.com/package/@yoast/components
    install: npm install @yoast/components
    official: true
    version: 3.0.0-alpha.3
    published: '2025-11-12'
    description: Yoast Components
    note: latest published dist-tag is a prerelease
  - language: javascript
    registry: npm
    name: '@yoast/analysis-report'
    url: https://www.npmjs.com/package/@yoast/analysis-report
    install: npm install @yoast/analysis-report
    official: true
    version: 2.0.0-alpha.2
    published: '2025-11-12'
    description: Rendering components for Yoast analysis results
    note: latest published dist-tag is a prerelease
  - language: javascript
    registry: npm
    name: '@yoast/helpers'
    url: https://www.npmjs.com/package/@yoast/helpers
    install: npm install @yoast/helpers
    official: true
    version: 0.17.0-alpha.2
    published: '2025-11-12'
    description: All Yoast helper functions
    note: latest published dist-tag is a prerelease
  - language: javascript
    registry: npm
    name: '@yoast/style-guide'
    url: https://www.npmjs.com/package/@yoast/style-guide
    install: npm install @yoast/style-guide
    official: true
    version: 0.14.0-alpha.1
    published: '2025-11-12'
    description: Yoast style guide
    note: latest published dist-tag is a prerelease
  - language: javascript
    registry: npm
    name: '@yoast/feature-flag'
    url: https://www.npmjs.com/package/@yoast/feature-flag
    install: npm install @yoast/feature-flag
    official: true
    version: 0.6.0-alpha.2
    published: '2025-11-12'
    note: latest published dist-tag is a prerelease
  - language: javascript
    registry: npm
    name: '@yoast/browserslist-config'
    url: https://www.npmjs.com/package/@yoast/browserslist-config
    install: npm install @yoast/browserslist-config
    official: true
    version: 1.2.5
    published: '2025-11-11'
    description: The browserslist configuration for Yoast projects

  # --- PHP: plugin distributions and developer tooling ---
  - language: php
    registry: packagist
    name: yoast/wordpress-seo
    url: https://packagist.org/packages/yoast/wordpress-seo
    install: composer require yoast/wordpress-seo
    official: true
    version: 28.3-RC2
    published: '2026-08-04'
    description: The Yoast SEO plugin distributed as a Composer package
  - language: php
    registry: packagist
    name: yoast/duplicate-post
    url: https://packagist.org/packages/yoast/duplicate-post
    install: composer require yoast/duplicate-post
    official: true
    version: '4.6'
    published: '2026-03-09'
    description: Yoast Duplicate Post plugin
  - language: php
    registry: packagist
    name: yoast/phpunit-polyfills
    url: https://packagist.org/packages/yoast/phpunit-polyfills
    install: composer require --dev yoast/phpunit-polyfills
    official: true
    version: 4.0.0
    published: '2025-02-09'
    description: PHPUnit cross-version polyfills
  - language: php
    registry: packagist
    name: yoast/wp-test-utils
    url: https://packagist.org/packages/yoast/wp-test-utils
    install: composer require --dev yoast/wp-test-utils
    official: true
    version: 1.2.1
    published: '2026-02-05'
    description: PHPUnit cross-version compatibility layer for testing WordPress plugins
  - language: php
    registry: packagist
    name: yoast/yoastcs
    url: https://packagist.org/packages/yoast/yoastcs
    install: composer require --dev yoast/yoastcs
    official: true
    version: 3.4.3
    published: '2026-08-07'
    description: PHP_CodeSniffer rules for Yoast projects
  - language: php
    registry: packagist
    name: yoast/test-helper
    url: https://packagist.org/packages/yoast/test-helper
    install: composer require --dev yoast/test-helper
    official: true
    version: '1.19'
    published: '2026-05-27'
    description: Yoast plugin testing helper
  - language: php
    registry: packagist
    name: yoast/whip
    url: https://packagist.org/packages/yoast/whip
    install: composer require yoast/whip
    official: true
    version: 2.0.0
    published: '2023-12-27'
    description: Nudges users to upgrade outdated PHP/WordPress
    note: no release in over two years
  - language: php
    registry: packagist
    name: yoast/i18n-module
    url: https://packagist.org/packages/yoast/i18n-module
    install: composer require yoast/i18n-module
    official: true
    version: 3.1.1
    published: '2019-05-07'
    description: Handle i18n for WordPress plugins
    note: last release 2019; effectively dormant
counts:
  total: 21
  official: 21
  languages:
    javascript: 12
    php: 9
  api_clients: 2
  unpinned_or_unpublished: 2