TYPO3 v14 development

Source: https://github.com/dirnbauer/webconsulting-skills

Strategy: This collection targets TYPO3 v14.x only. Patterns here assume a v14 codebase. For migrating from older majors, use typo3-rector, typo3-extension-upgrade, Fractor, and the official upgrade guide first.

Scope — read this before using any constraint below. This skill is the v14 API reference: how v14 code is written. It does not run upgrades. Upgrading a whole project or site from v12/v13 is typo3-upgrade-run, which owns the version constraints, the PHP target, the ext_emconf.php policy and the migration process end to end. Where the two differ, typo3-upgrade-run wins — load it first for an upgrade run and use this skill as the API reference during its manual-migration phase.

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 TYPO3 v14 by checking the official TYPO3 documentation.

1. Version Strategy

Target: TYPO3 v14.x only