Development

TYPO3 Core Contributions

Guide contributions to TYPO3 core following official contribution guidelines. Includes patch creation, Gerrit workflow, coding guidelines, testing requirements, and review processes for contributing to the TYPO3 core.

Latest release v1.19.1

Install

Choose a supported route below. Package contents, agent registration and runtime dependencies can differ between installers.

  1. Claude Code via this marketplace
    /plugin install typo3-core-contributions@netresearch-claude-code-marketplace

    First add the marketplace once in Claude Code: /plugin marketplace add netresearch/claude-code-marketplace. Then install the selected plugin. For setup and installation scopes, see Claude Code plugin setup A plugin can include several skills and additional components.

  2. npx interactive skill selection
    npx skills add https://github.com/netresearch/typo3-core-contributions-skill

    Requires Node.js 22.20+. Run from the target project, then choose the source skills and agents in the installer. Uses the skills CLI from skills.sh Installs skill instructions. Extra plugin hooks, commands and external runtime tools are not installed by this route.

  3. composer require PHP project, as a package
    composer require netresearch/typo3-core-contributions-skill

    Allow the Composer skill installer to activate and approve skill registration when prompted. Requires netresearch/composer-agent-skill-plugin Discovers trusted skill packages and registers their instructions in AGENTS.md. Runtime tools may need separate setup.

  4. composer skills:add PHP project, direct source
    composer skills:add netresearch/typo3-core-contributions-skill

    Install and activate netresearch/composer-agent-skill-plugin first; approve the selected source's skill registration. Provided by netresearch/composer-agent-skill-plugin Pins source repositories without a Packagist package and records them in composer.skills.lock. Runtime dependencies remain separate.

What you can do with it

  • Step-by-step guidance from setup to patch submission
  • Automated detection of common issues
  • Best practices enforcement at every stage
  • Systematic debugging of failed GitLab CI jobs
  • Pattern recognition for common failures
  • Automated fix suggestions
  • Pre-submission validation
  • Code style enforcement (CGL)
  • PHPStan static analysis
  • Comprehensive test coverage
  • Gerrit workflow reference
  • Commit message format guidelines
  • Troubleshooting guide for the Gerrit-specific failures
  • WIP state management

What you get back

  • A prepared TYPO3 Core patch with the required commit message and pre-submission checks, or a diagnosis of a failing contribution pipeline.

What it expects in your project

  • Git configured with your TYPO3.org email
  • SSH key uploaded to review.typo3.org
  • Docker (for DDEV) or native PHP 8.2+ environment

Tags

  • development
  • typo3