name: typo3-conformance description: "Use when assessing TYPO3 extension quality, conformance checking, standards compliance, modernization to v12/v13/v14 (v14.3 LTS is the default/gold standard), TER readiness, or best practices review. Also triggers on: extension audit, quality score, full assessment, fix all findings, conformance audit, Fluid 5 strict ViewHelpers, ext_tables.php removal, Extbase attributes (Authorize/RateLimit), HashService removal, Bootstrap 5 migration, CSP compliance, ViewHelper security, XLIFF hygiene, PHP 8.4/8.5 compat." metadata: version: "2.13.0" repository: https://github.com/netresearch/typo3-conformance-skill author: Netresearch DTT GmbH

TYPO3 Extension Conformance Checker

Evaluate TYPO3 extensions against TYPO3 coding standards, architecture patterns, and best practices.

When to Use

• Extension quality / TER readiness
• Scored conformance reports
• Modernization to v12/v13/v14 (v14.3 LTS is default/gold standard)

Delegation

Testing -> typo3-testing | Docs -> typo3-docs | OpenSSF -> enterprise-readiness

Workflow

Step 0: Context

Read ext_emconf.php + composer.json for version, type, scope.

Steps 1-11: Checks

1. Metadata -- key, TYPO3 version, type
2. Structure -- composer.json, ext_emconf.php, Classes/, Configuration/, Resources/
3. Coding -- strict_types, PSR-12, PHP 8.4 explicit nullable, PHP 8.5 float-to-int
4. Prohibited -- no $GLOBALS, no GeneralUtility::makeInstance() for services
5. Architecture -- constructor DI, Services.yaml, PSR-14 events (try/catch), PSR-3 logging (LoggerAware+NullLogger), factory fallback
6. Backend -- ES6, Modal API, CSRF, CSP (v13+)
7. Testing -- PHPUnit, Playwright E2E, coverage >70%
8. Practices -- DDEV, runTests.sh, CI/CD
9. TER -- publish workflow, upload comment
10. Audit -- PHPStan baseline, TCA searchFields, XLIFF, cache has()+get(), query properties, multi-version adapters
11. v14 readiness -- no ext_tables.php/HashService/magic finders; Fluid VHs strict; XLF 2-space. See references/v14-deprecations.md.

Step 12: Verify

Re-run after fixes. Document score delta.

Quick Grep Recipes

grep -rL 'strict_types' Classes/ --include='*.php'                   # missing strict_types
grep -rn '\$GLOBALS' Classes/ --include='*.php'                       # prohibited $GLOBALS
grep -rn 'GeneralUtility::makeInstance' Classes/ --include='*.php'    # makeInstance for services
grep -rPn '\(\s*[A-Za-z\\]+\s+\$\w+\s*=\s*null' Classes/ --include='*.php' | grep -v '?'  # PHP 8.4 implicit nullable
grep -rn '->has(' Classes/ --include='*.php'                          # cache has()+get() anti-pattern
grep -l 'strict_types' ext_emconf.php                                 # ext_emconf must NOT have strict_types
grep -rn '(int)\s*\$' Classes/ --include='*.php'                      # PHP 8.5 implicit float-to-int
grep -rn 'data-toggle\|data-dismiss\|data-ride' Resources/ --include='*.html'  # Bootstrap 4 in Fluid
grep -rn 'HashService\|GeneralUtility::hmac(\|->findBy[A-Z]\|->findOneBy[A-Z]\|->countBy[A-Z]' Classes/ --include='*.php'  # v14 removals
[ -f ext_tables.php ] && echo "WARN: ext_tables.php deprecated (#109438)"   # v14.3 deprecation

Scoring

Base (0-100): Architecture(20) + Guidelines(20) + PHP(20) + Testing(20) + Practices(20). Excellence bonus up to 22. Critical issues block regardless.

References

See references/:

• Architecture & code: extension-architecture.md, directory-structure.md, php-architecture.md, coding-guidelines.md, best-practices.md, hooks-and-events.md
• Validation: composer-validation.md, ext-emconf-validation.md, ext-files-validation.md, runtests-validation.md, version-requirements.md, testing-standards.md
• Multi-version: dual-version-compatibility.md (v12+v13), v13-v14-dual-compatibility.md (v13+v14), multi-version-dependency-compatibility.md, v13-deprecations.md, v14-deprecations.md
• Practices & environment: development-environment.md (DDEV)
• Backend & publishing: backend-module-v13.md, ter-publishing.md, report-template.md, excellence-indicators.md, localization-coverage.md, crowdin-integration.md

Asset templates in assets/Build/: PHPStan, PHP-CS-Fixer, Rector, ESLint, Stylelint, TypoScript lint.