Overview
Systematic TYPO3 extension upgrades to newer LTS versions with modern PHP compatibility. Extension Scanner assessment, Rector for PHP migrations, Fractor for FlexForms/TypoScript/YAML/Fluid, PHPStan, and testing setup. Version-specific guidance for v11→v12, v12→v13, and dual-compatibility.
Detailed guide coming soon. We haven't written a full guide for this skill yet.
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