Since v6.3.* will be last minor patch, let's start to plan next major !
We will mainly focus on AutoMapper for this update !

Jane

• Rework namespaces in order to move all current components into src/Component/, this will allow to create new library such as bridges (see [AutoMapper] Ignore API Platform resources when using AutoMapper normalizer #432) (done in [Jane] Rework namespaces #457)

AutoMapper

Refactoring

• Remove the TransformerFactory behavior, we can manage everything in Transformer class to make this easier to extends. To do that we also needs to add a supports(Type $sourceType, Type $targetType, MapperMetadataInterface $mapperMetadata) method in transformers.
• Priority in transformers should be managed by a PrioritizedTransformerInterface (done in [AutoMapper] Add PrioritizedTransformerFactoryInterface and implementation #458)
• Dependencies in transformers should be managed by a DependentTransformerInterface (done in [AutoMapper] Add DependentTransformerInterface and implementation #459)
• Reference assignement in transformers should be managed by a AssignedByReferenceTransformerInterface (done in [AutoMapper] Add AssignedByReferenceTransformerInterface and implementation #460)

Enhancement

• Automatically tag ConfigurationPassInterface instance with autoconfiguration (will need an update of the related interface, see [AutoMapper] Automatically tag ConfigurationPassInterface instance #450) [only a deprecation to remove now] (done in Remove deprecated code #467)
• Handle dictionary with ArrayTransformer (done in [AutoMapper] Handle dictionary with ArrayTransformer #433)

Bundle

• Extract AutoMapper bundle from the component (done in [AutoMapper] Move bundle out of the component #462)

Bridge

• Create the API Platform bridge to skip AutoMapper on APIP resources (see [AutoMapper] Ignore API Platform resources when using AutoMapper normalizer #432)

Documentation

• Add a "Getting started with Symfony" guide
• Add a "Make a custom transformer" guide

External contributions

• Add a Symfony Flex recipe (see https://github.com/symfony/recipes-contrib)