Doctrine

Tier: core — an entity, a repository and a reviewed migration are not optional. SELECT NEW projections are the on-demand part: reach for one when a list hydrates more than it shows.

Entities, relations, repositories, and migrations that survive contact with real data.

Everything here follows from one decision: entities are dumb. They are the maker shape — private properties, getters and setters, mapping attributes, nothing else. That choice has consequences all the way up the stack, so it is worth stating the consequence before the rules.

vendor/ is the source of truth over anything written here. This skill was verified against Doctrine ORM 3.6, DBAL 4.4, doctrine-bundle 3.3 and Symfony 8.1; several APIs that older blog posts still show no longer exist.

The entity, and what it cannot do