TYPO3 CMS: Core development roles and groups

The TYPO3 CMS Core has a lot of different areas. Right now no individual contributor or Core Team member knows every area of code by heart. This often makes it really hard to decide on how to proceed when it comes to specialized code areas.

This is a companion discussion topic for the original entry at https://typo3.org/article/typo3-cms-core-development-roles-and-groups/