TYPO3 Extension Conformance Checker
A comprehensive Claude Code skill for evaluating TYPO3 extensions against official TYPO3 coding standards, architecture patterns, and best practices.
🔌 Compatibility
This is an Agent Skill following the open standard originally developed by Anthropic and released for cross-platform use.
Supported Platforms:
- ✅ Claude Code (Anthropic)
- ✅ Cursor
- ✅ GitHub Copilot
- ✅ Other skills-compatible AI agents
Skills are portable packages of procedural knowledge that work across any AI agent supporting the Agent Skills specification.
Overview
This skill enables systematic evaluation of TYPO3 extensions for conformance to official TYPO3 standards.
Skill Ecosystem Integration
This conformance checker acts as an orchestrator that delegates to specialized skills for deep domain analysis:
🔧 Testing Analysis: typo3-tests
📚 Documentation Analysis: typo3-docs
Delegation Benefits:
- Depth: Each skill provides domain expertise beyond surface-level checks
- Accuracy: Specialized validation reduces false positives/negatives
- Modularity: Skills can be used independently or together
- Maintainability: Each skill focuses on single responsibility
Fallback Strategy:
- Surface-level checks performed if specialized skills unavailable
- Basic validation ensures conformance reports always generate
- Full accuracy requires all ecosystem skills installed
Standards Checked
| Standard | Version/Specification |
|---|
| TYPO3 Core | 14.3 LTS (default / gold standard) / 13.4 LTS / 12.4 LTS |
| PHP | 8.2 / 8.3 / 8.4 / 8.5 (v14 floor: 8.2; ceiling: 8.5.99) |
| Coding Style | PSR-12 (Extended Coding Style) |
| Architecture | Dependency Injection (PSR-11), PSR-14 Events, PSR-15 Middleware, Fluid 5 strict VHs, Extbase PHP attributes |
| Testing | PHPUnit 11/12/13, TYPO3 Testing Framework 9.x, Playwright E2E |
| Documentation | reStructuredText (RST), TYPO3 Documentation Standards, XLIFF 2.x (v14+) |
Conformance Areas
- Extension Architecture - File structure, naming conventions, required files
- Coding Guidelines - PSR-12 compliance, TYPO3-specific code style
- PHP Architecture - Dependency injection, services, events, Extbase patterns
- Testing Standards - Unit, functional, and Playwright E2E testing requirements
- Best Practices - Real-world patterns from Tea extension and core standards
Features
Automated Validation Scripts
- ✅ check-conformance.sh - Main orchestration script
- 📁 check-file-structure.sh - File structure and directory validation
- 📝 check-coding-standards.sh - PSR-12 and TYPO3 code style checks
- 🏗️ check-architecture.sh - Dependency injection and architecture patterns
- 🧪 check-testing.sh - Testing infrastructure and coverage analysis
- 📊 generate-report.sh - Comprehensive conformance report generation
Reference Documentation
Core Standards:
- version-requirements.md - Official TYPO3 and PHP version compatibility matrix
- extension-architecture.md - TYPO3 file structure standards
- coding-guidelines.md - PSR-12 and TYPO3 code style guide
- php-architecture.md - Dependency injection and architectural patterns
- testing-standards.md - Unit, functional, and Playwright E2E testing
- best-practices.md - Real-world patterns and project infrastructure
Advanced Validation Guides:
- runtests-validation.md - Validate Build/Scripts/runTests.sh against Tea extension reference
- development-environment.md - Validate DDEV/Docker development environment setup
- directory-structure.md - Validate .Build/ vs Build/ directory separation and organization
Excellence Indicators:
- excellence-indicators.md - Optional quality features for exceptional extensions (0-20 bonus points)
- Community & Internationalization: Crowdin, issue templates, .gitattributes, README badges
- Advanced Quality Tooling: Fractor, TYPO3 CodingStandards, StyleCI, Makefile, CI matrix
- Documentation Excellence: 100+ RST files, modern tooling (guides.xml, screenshots.json)
- Extension Configuration: ext_conf_template.txt, composer doc scripts, multiple Sets
Secondary References:
- georgringer/news - Community reference extension demonstrating excellence patterns
Quality Tool Configuration Templates
