TYPO3 Documentation Skill

Create and maintain TYPO3 extension documentation following official docs.typo3.org standards.

TYPO3 API First: Always use TYPO3's built-in APIs, core features, and established conventions before creating custom implementations. Do not reinvent what TYPO3 already provides. Always verify that the APIs and methods you use exist and are not deprecated in your target TYPO3 version (v13 or v14) by checking the official TYPO3 documentation.

When to Use

Creating documentation from scratch (no Documentation/ exists)
Editing Documentation/**/*.rst files
Using TYPO3 directives: confval, versionadded, card-grid, tabs
Creating/adding screenshots
Rendering and testing documentation locally
Deploying to docs.typo3.org

Documentation Structure

Documentation/
├── Index.rst                 # Main entry point
├── guides.xml                # Configuration file
├── Introduction/
│   └── Index.rst
├── Installation/
│   └── Index.rst
├── Configuration/
│   └── Index.rst
├── Usage/
│   └── Index.rst
├── Developer/
│   └── Index.rst
└── Images/
    └── screenshot.png

Creating Documentation from Scratch

When no Documentation/ directory exists, use the init command:

docker run --rm --pull always -v $(pwd):/project -it \
  ghcr.io/typo3-documentation/render-guides:latest init

Interactive prompts:

Format: Choose rst (ReStructuredText) for full TYPO3 theme features
Site Set: Enter name/path if extension defines a Site set

guides.xml Configuration

<?xml version="1.0" encoding="UTF-8"?>
<guides xmlns="https://www.phpdoc.org/guides" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xsi:schemaLocation="https://www.phpdoc.org/guides https://docs.typo3.org/render-guides/guides.xsd">
    <project title="My Extension"/>
    <extension name="my_extension"/>
</guides>

With GitHub Integration

<?xml version="1.0" encoding="UTF-8"?>
<guides xmlns="https://www.phpdoc.org/guides" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xsi:schemaLocation="https://www.phpdoc.org/guides https://docs.typo3.org/render-guides/guides.xsd">
    <project title="My Extension" version="1.0.0"/>
    <extension name="my_extension"/>
    <inventory id="t3coreapi" url="https://docs.typo3.org/m/typo3/reference-coreapi/main/en-us/"/>
    <settings>
        <setting name="edit_on_github" value="https://github.com/vendor/my-extension/edit/main/Documentation/"/>
        <setting name="edit_on_github_branch" value="main"/>
    </settings>
</guides>

RST Syntax Reference

Headings

==========
Page Title
==========

Section
=======

Subsection
----------

Subsubsection
~~~~~~~~~~~~~

Code Blocks

..  code-block:: php
    :caption: Classes/Service/MyService.php

    <?php
    declare(strict_types=1);

    namespace Vendor\MyExtension\Service;

    final class MyService
    {
        // ...
    }

Inline Code and Text Roles

Use :php:`MyClass` for PHP references.
The file :file:`ext_localconf.php` is loaded automatically.
Click :guilabel:`Save` to apply changes.
Press :kbd:`Ctrl+S` to save.

Links and References

See :ref:`my-reference-label` for more information.

External link: `TYPO3 Documentation <https://docs.typo3.org/>`__

..  _my-reference-label:

Section with Reference
======================

This section can be referenced from anywhere.

TYPO3 Directives

confval (Configuration Values)

..  confval:: encryptionMethod
    :name: ext-myext-encryptionMethod
    :type: string
    :default: 'aes-256-gcm'
    :required: false

    The encryption method to use for API keys.

    Available options:

    -   ``aes-256-gcm`` (recommended)
    -   ``aes-256-cbc``

versionadded / versionchanged / deprecated

..  versionadded:: 2.0.0
    This feature was added in version 2.0.0.

..  versionchanged:: 2.1.0
    The default value was changed from ``false`` to ``true``.

..  deprecated:: 3.0.0
    Use :php:`newMethod()` instead.

Admonitions

..  note::
    Background information users should know.

..  tip::
    Helpful suggestion for better results.

..  warning::
    Potential issue or data loss risk.

..  important::
    Critical information that must not be missed.

Tabs

..  tabs::

    ..  group-tab:: Composer

        Install via Composer:

        ..  code-block:: bash

            composer require vendor/my-extension

    ..  group-tab:: TER

        Download from the TYPO3 Extension Repository.

Card Grid

..  card-grid::
    :columns: 2
    :card-height: 100

    ..  card:: Installation

        Learn how to install the extension.

        :ref:`Read more <installation>`

    ..  card:: Configuration

        Configure the extension for your needs.

        :ref:`Read more <configuration>`

Accordion

..  accordion::

    ..  accordion-item:: How do I install this extension?

        See the :ref:`installation` chapter.

    ..  accordion-item:: What PHP version is required?

        PHP 8.2 or higher is required.

Editor Configuration

Create Documentation/.editorconfig:

root = true

[*]
charset = utf-8
end_of_line = lf
indent_style = space
indent_size = 4
insert_final_newline = true
trim_trailing_whitespace = true
max_line_length = 80

Rendering Documentation

Local Rendering

# Render documentation
docker run --rm --pull always -v $(pwd):/project -it \
  ghcr.io/typo3-documentation/render-guides:latest

# Output is in Documentation-GENERATED-temp/

With Live Preview

# Start watch mode for live preview
docker run --rm --pull always -v $(pwd):/project -p 8080:8080 -it \
  ghcr.io/typo3-documentation/render-guides:latest --watch

# Open http://localhost:8080 in browser

Validation

# Validate RST syntax
docker run --rm --pull always -v $(pwd):/project -it \
  ghcr.io/typo3-documentation/render-guides:latest --no-progress --fail-on-log

Screenshots

Requirements

PNG format
72 DPI
Appropriate size (not too large)
Always include :alt: text

Adding Screenshots

..  figure:: /Images/BackendModule.png
    :alt: Backend module screenshot
    :class: with-shadow

    The backend module provides an overview of all items.

Screenshot Directory

Documentation/
└── Images/
    ├── BackendModule.png
    ├── Configuration.png
    └── Frontend.png

Writing Guidelines

General Rules

Use American English spelling (color, behavior, optimize)
Use sentence case for headings (not Title Case)
Maximum line length: 80 characters
Use 4 spaces for indentation (no tabs)
Add blank line before and after code blocks
Use present tense

CamelCase for Files

Index.rst (not index.rst)
Configuration/ (not configuration/)
BackendModule.png (not backend-module.png)

Example: Good Documentation

============
Installation
============

This chapter explains how to install the extension.

Requirements
============

-   TYPO3 v13.4 or v14.x
-   PHP 8.2 or higher

Installation via Composer
=========================

Run the following command:

..  code-block:: bash

    composer require vendor/my-extension

After installation, activate the extension:

..  code-block:: bash

    vendor/bin/typo3 extension:activate my_extension

Deployment to docs.typo3.org

Prerequisites

Extension registered on extensions.typo3.org
Documentation in Documentation/ directory
Valid guides.xml configuration

Webhook Setup

Go to https://intercept.typo3.com/
Login with TYPO3.org account
Register your repository
Add webhook to GitHub/GitLab

Trigger Rendering

Documentation is automatically rendered when:

Webhook receives push event
Manual trigger via Intercept

Complete Index.rst Example

..  include:: /Includes.rst.txt

.. _start:

==============
My Extension
==============

:Extension key:
    my_extension

:Package name:
    vendor/my-extension

:Version:
    |release|

:Language:
    en

:Author:
    Your Name

:License:
    This document is published under the
    `Creative Commons BY 4.0 <https://creativecommons.org/licenses/by/4.0/>`__
    license.

:Rendered:
    |today|

----

This extension provides functionality for managing items.

----

**Table of Contents**

..  toctree::
    :maxdepth: 2
    :titlesonly:

    Introduction/Index
    Installation/Index
    Configuration/Index
    Usage/Index
    Developer/Index

..  toctree::
    :hidden:

    Sitemap

Resources

TYPO3 Documentation Guide: https://docs.typo3.org/m/typo3/docs-how-to-document/main/en-us/
RST Primer: https://docs.typo3.org/m/typo3/docs-how-to-document/main/en-us/WritingReST/
Render Guides: https://github.com/TYPO3-Documentation/render-guides
Intercept: https://intercept.typo3.com/

v14-Only Documentation Changes

The following documentation-related changes apply exclusively to TYPO3 v14.

XLIFF 2.x Support [v14 only]

TYPO3 v14 supports XLIFF 2.x translation files (#107710) alongside the existing XLIFF 1.2 format. Document which XLIFF version your extension uses.

Translation Domain Mapping [v14 only]

New translation domain mapping feature (#93334) allows flexible XLIFF file resolution. Extensions can map translation domains to specific XLIFF files without following the convention-based path.

TranslateViewHelper Domain Syntax [v14 only]

The TranslateViewHelper (<f:translate>) supports a new domain syntax (#107759) for referencing translations across extension boundaries using LLL:EXT: shorthand.

Symfony Translation Component [v14 only]

TYPO3's localization system now uses the Symfony Translation Component (#107436) internally. This affects how translation files are parsed and cached. Custom localization parser implementations are deprecated.

`xml:space` Attribute in XLIFF [v14.2+ only]

XLIFF files now respect the xml:space attribute for whitespace handling. Document any whitespace-sensitive translations appropriately.

Credits & Attribution

Thanks to Netresearch DTT GmbH for their contributions to the TYPO3 community.