Engineering Notes

Technical write-ups on PHP, Symfony and domain modeling. The kind of detail that doesn't fit a service page: full code, real trade-offs, no generic tutorials.

• September 24, 2026 · ~8 min read

  Recorded, Not Injected

  Publish a domain event the moment an aggregate method runs, and you're announcing something before you know it's true. An AggregateRoot base class with recordThat() and pullEvents() fixes exactly that, and opens three smaller ways to get it wrong instead.

• September 23, 2026 · ~6 min read

  Readonly Doesn't Make a Value Object

  final readonly class makes a Value Object immutable, not comparable. Why === and array_unique() break on equal values, and the equals() contract PHP leaves to you.