The WordPress docs that matter.

The official docs, current version. Your AI finds the right page with wp_docs.

Core handbooks

Plugin Handbook: Building plugins: hooks, settings, security, internationalization.
Theme Handbook: Block themes, theme.json, templates and patterns.
Common APIs: Options, HTTP, transients, cron, and the other core APIs.
Code Reference: Every function, hook, class and method, with the version it arrived in.
Security: Sanitizing, escaping, nonces and capability checks.
Coding Standards: PHP, JavaScript, CSS, HTML and accessibility standards.

Blocks and the editor

Block Editor Handbook: Creating blocks, extending the editor, data and components.
block.json metadata: The recommended way to register a block.
Interactivity API: Front-end interactivity for blocks without a framework.

Common developer topics

Theme Handbook: getting started: Building a block theme: files, templates, theme.json and the tools.
Block styles: Registering style variations for a block (register_block_style).
My site was hacked (WordPress FAQ): The official first steps after a hack: contact the host, change passwords, restore, update.
Hardening WordPress: File permissions, keys, admin users and other hardening steps.
Brute force attacks: Protecting the login against brute force attacks.
Nonces: Create and verify nonces to protect URLs and forms.
REST API authentication: Cookie, nonce and application password authentication for the REST API.
Posts (REST API reference): The /wp/v2/posts endpoint: list, create, update and delete posts, with every argument.
REST API reference: Every core endpoint under /wp/v2/: posts, pages, media, users, terms and the rest.
Adding custom REST endpoints: register_rest_route, permission callbacks and responses.
WordPress 7.2 release page: The 7.2 development cycle: schedule, release team and dates (wp_now gives the planned date with its source).
ServerSideRender: The component that previews a server-rendered block in the editor.
Creating dynamic blocks: Blocks rendered in PHP at view time (render in block.json, or render_callback).
Registration of a block: Registering a block with block.json, in PHP and JavaScript.
block.json metadata: Every block.json field, and why it is the recommended way to register a block.
register_block_type(): The PHP function that registers a block from its block.json.
PHP compatibility and WordPress versions: Which PHP versions each WordPress version supports (core only: plugins and themes state only a minimum).
WordPress backups: What to back up (database and files), how often, and where to keep copies.
Backing up and restoring the database: Database backups, and restoring one with phpMyAdmin or the MySQL command line.
Backing up your WordPress files: Which files to copy (wp-content, wp-config.php) and how.
CSS in WordPress: Where to add your own CSS (Additional CSS, the Site Editor, a child theme) and the classes WordPress adds.
Styles overview (Site Editor): Change colors, typography and layout site-wide in Appearance > Editor > Styles, and add custom CSS, without code.
Site Editor: Editing templates, template parts, navigation and styles in a block theme.
Email troubleshooting (WooCommerce): Why order emails are not sent or land in spam, and how to check and fix it.
wp_mail(): How WordPress sends email (through the server unless an SMTP plugin takes over), its filters and failures.
Moving WordPress: Moving a site to a new host or domain, and changing its URLs safely.
wp search-replace: Replace the old URL in the database safely, serialized data included (try --dry-run first).
HTTPS for WordPress: Moving a site to HTTPS, and fixing mixed content and redirect loops.
Common WordPress errors: The critical error message, Recovery Mode, the white screen, database connection and 500 errors, and what to do for each.
Debugging in WordPress: WP_DEBUG and the debug log, to find which plugin or theme causes an error.
Discussion settings: Comment approval, links held for moderation, disallowed words and closing comments on old posts.
Comment moderation: Approving, marking as spam and moderating comments.
Spam filtering (Contact Form 7): Contact Form 7's spam protection: the disallowed list, Akismet, reCAPTCHA and Turnstile.
Permalinks settings: Settings > Permalinks: the URL structure, and saving it again to rebuild the rewrite rules (fixes most 404s after a move).
Apache and .htaccess: The WordPress .htaccess rules and mod_rewrite on Apache.
Nginx: WordPress rewrite rules for Nginx (it ignores .htaccess).
General settings: Site title, tagline, addresses, timezone, language, and whether anyone can register.
Site icon (favicon): Set the site icon in Settings, General (WordPress 6.5+), or in the Site Editor or Customizer.
Schedule a post: Pick a future date and time under Publish in the post settings sidebar; the post shows as Scheduled until then.
Limit post revisions: WP_POST_REVISIONS in wp-config.php: a number to keep, or false to stop saving revisions.
Increase the PHP memory limit: WP_MEMORY_LIMIT and WP_MAX_MEMORY_LIMIT in wp-config.php; the host's PHP limit still caps them.
Synced patterns (reusable blocks): Create, edit and detach synced patterns, formerly reusable blocks.
Template hierarchy: Which template file WordPress picks for each page, including custom post type archives and singles.
Reading settings: Choose a static front page or latest posts, posts per page, and search engine visibility.
Navigation block (menus): Adding and editing menus in a block theme with the Navigation block.
Appearance Menus screen: Menus in classic themes: Appearance > Menus.
Manage widgets: Adding and arranging widgets in sidebars and other widget areas.
Reset your password: Resetting a password from the login screen, the profile, or the database when locked out.
Plugin and theme auto-updates: Turning automatic updates on or off for each plugin and theme.
Tools Import screen: Importing posts, pages and media from another WordPress site or another platform.
WordPress in your language: Running WordPress and its admin in another language.
Child themes: Creating a child theme to change a theme without losing the changes on update.
Administration menus: Adding a top-level or sub menu page to the admin for your plugin.
Tutorial: build your first block: Building a custom block step by step with block.json and @wordpress/create-block.
the_content: The filter that changes post content before it is displayed.
Cron: WP-Cron: scheduling events and intervals.
Abilities API: Registering what a site can do, for agents and MCP.
Abilities API PHP reference: wp_register_ability, wp_register_ability_category and their hooks, with every argument.
Disable the plugin and theme file editor: DISALLOW_FILE_EDIT in wp-config.php removes the code editors from the admin.
Typography in theme.json: Font families, sizes and font faces in theme.json.
Template parts: Reusable parts of a block theme such as the header and the footer.
File permissions: Safe file and folder permissions for WordPress on the server.
Database table prefix: The $table_prefix setting in wp-config.php.
is_user_logged_in(): Checking whether the current visitor is logged in.
login_redirect: The filter that sets where users land after logging in.
add_role(): Creating a custom role with its capabilities (run once, on plugin activation).
Roles and Capabilities (for site owners): What Administrators, Editors, Authors, Contributors and Subscribers can each do.
Roles and capabilities: Roles, capabilities and checking them.
Transients: Temporary cached data with an expiration.
Caching: Page, object and browser caching for WordPress.
Settings API: Settings pages, sections and fields.
Options API: Storing and reading settings in the options table.
Registering custom post types: register_post_type and its arguments.
Shortcodes: Creating and registering shortcodes.
Sanitizing data: Cleaning user input before saving it.
Escaping data: Escaping output to prevent XSS.
HTTP API: wp_remote_get, wp_remote_post and responses.
Internationalization: Making plugins translatable.
Block Bindings API: Connecting block attributes to custom fields and other sources.
Metadata: Post, user and term meta.
AJAX: AJAX requests in plugins (admin-ajax and nonces).
theme.json: global settings and styles: Settings and styles for block themes in theme.json.
Block patterns: Registering and using block patterns.
wp core update-db: Runs the database upgrade after a core update; --network does every site of a multisite.
Network Admin: Updates, plugins and themes for a whole network: what the Network Admin screens do.
Upgrading WordPress: The official steps for a core upgrade, backup first.
Multisite: Creating and running a WordPress network.
WP-CLI commands: Every WP-CLI command and its options.
User metadata: Storing data per user.
Custom taxonomies: register_taxonomy and working with terms.
Admin menus: Adding top-level and sub-menus in the admin.
Including CSS and JavaScript: wp_enqueue_script and wp_enqueue_style.
Uninstall methods: Cleaning up when a plugin is deleted.
Heartbeat API: The admin heartbeat: polling the server from the browser.
Hooks: actions and filters: How add_action and add_filter work.
REST API Handbook: The REST API: routes, endpoints, authentication and extending it.

Popular plugins

HPOS recipe book (WooCommerce): High-Performance Order Storage: declaring compatibility (FeaturesUtil::declare_compatibility) and moving to the order CRUD APIs.
Payment methods in the Checkout block (WooCommerce): Registering a payment method for the block-based Cart and Checkout (PHP integration plus registerPaymentMethod).
Payment Gateway API (WooCommerce): Building a payment gateway with WC_Payment_Gateway.
WooCommerce REST API: The WooCommerce REST API reference (wc/v3): orders, products, customers.
WooCommerce developer docs: Official WooCommerce developer documentation: extensions, blocks, features and APIs.
ACF Blocks (Advanced Custom Fields): Building blocks with ACF and block.json.
Register ACF fields via PHP: acf_add_local_field_group: field groups defined in code.
ACF developer resources: Official ACF documentation: functions, field types, filters, blocks and the REST API.
Yoast SEO developer portal: Yoast SEO APIs and filters (wpseo_*), including the Schema API.
Gravity Forms REST API v2: Forms and entries over the Gravity Forms REST API (gf/v2).
Gravity Forms developer docs: Hooks (gform_after_submission and the rest), add-on framework and APIs.
Configuring caching plugins for WooCommerce: Which pages and cookies to exclude from page caching (cart, checkout, my account) so a shop keeps working.

WordPress.com

Form block (WordPress.com): Contact forms on WordPress.com, with the built-in Form block.
SEO tools (WordPress.com): Built-in SEO tools on WordPress.com.
WordPress.com Support: Help for sites hosted on WordPress.com, where the host runs core and PHP.

Page builders

Their current versions and official MCP servers are on Page builders.

Elementor: Custom widgets, controls, dynamic tags and hooks. Official MCP.
Divi: Divi 5 modules, extensions and the builder APIs.
Beaver Builder: Custom modules, hooks and filters. Official MCP.
Bricks: Elements, query loops, custom elements and hooks.
Breakdance: User guide and developer docs, including custom elements. Official MCP.
Oxygen: Oxygen 6 docs, by the team behind Breakdance. Official MCP.
WPBakery: Knowledge base, including the inner API for custom elements.

AI and MCP

Abilities API: Register what a site can do, so agents and other code can call it.
AI Client in WordPress 7.0: wp_ai_client_prompt() and provider plugins.
MCP Adapter: The official plugin that exposes abilities to MCP clients.

Tools and operations

REST API Handbook: Routes, authentication and extending the REST API.
WP-CLI commands: Every WP-CLI command and its options.
Advanced Administration: Hosting, performance, security hardening and debugging.
WordPress Playground: A full WordPress in the browser, for testing and demos.

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