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patchlevel

Documentation for the patchlevel open-source PHP libraries - a complete event-sourcing toolkit including the core library, framework integrations for Symfony and Laravel, and the hydrator used to (de)serialize events and aggregates.

For agents: Documentation for patchlevel open-source PHP event-sourcing libraries, with Symfony and Laravel integrations, snapshots, subscriptions and upcasting guides.

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# patchlevel

> Documentation for the patchlevel open-source PHP libraries - a complete event-sourcing toolkit including the core library, framework integrations for Symfony and Laravel, and the hydrator used to (de)serialize events and aggregates.

Site: https://patchlevel.dev

## About

- patchlevel/event-sourcing is a fully typed, developer-experience focused event-sourcing library for PHP, built on top of the Doctrine ecosystem.
- Native integrations exist for Symfony (event-sourcing-bundle) and Laravel (laravel-event-sourcing).
- The hydrator package powers (de)serialization of events, aggregates, and value objects.

Each link below resolves to the raw markdown source of the page (the same content the on-site renderer consumes), so AI tools can fetch it directly without HTML parsing.

For the full markdown of every doc page concatenated into a single file, see https://patchlevel.dev/llms-full.txt.


## patchlevel/event-sourcing

> The core PHP event-sourcing library: aggregates, events, repositories, stores, subscriptions, and the message/command/event/query buses.

- [Upcasting](https://patchlevel.dev/docs/event-sourcing/latest/upcasting.md)
- [Testing](https://patchlevel.dev/docs/event-sourcing/latest/testing.md)
- [Our supported versions](https://patchlevel.dev/docs/event-sourcing/latest/supported-versions.md)
- [Subscriptions](https://patchlevel.dev/docs/event-sourcing/latest/subscription.md)
- [Store](https://patchlevel.dev/docs/event-sourcing/latest/store.md)
- [Split Stream](https://patchlevel.dev/docs/event-sourcing/latest/split-stream.md)
- [Snapshots](https://patchlevel.dev/docs/event-sourcing/latest/snapshots.md)
- [Repository](https://patchlevel.dev/docs/event-sourcing/latest/repository.md)
- [Query Bus](https://patchlevel.dev/docs/event-sourcing/latest/query-bus.md)
- [Personal Data (GDPR)](https://patchlevel.dev/docs/event-sourcing/latest/personal-data.md)
- [Our Backward Compatibility Promise](https://patchlevel.dev/docs/event-sourcing/latest/our-backward-compatibility-promise.md)
- [Normalizer](https://patchlevel.dev/docs/event-sourcing/latest/normalizer.md)
- [Metadata Cache](https://patchlevel.dev/docs/event-sourcing/latest/metadata-cache.md)
- [Message](https://patchlevel.dev/docs/event-sourcing/latest/message.md)
- [Message Decorator](https://patchlevel.dev/docs/event-sourcing/latest/message-decorator.md)
- [Event-Sourcing](https://patchlevel.dev/docs/event-sourcing/latest/introduction.md)
- [Getting Started](https://patchlevel.dev/docs/event-sourcing/latest/getting-started.md)
- [Events](https://patchlevel.dev/docs/event-sourcing/latest/events.md)
- [Event Bus](https://patchlevel.dev/docs/event-sourcing/latest/event-bus.md)
- [Command Bus](https://patchlevel.dev/docs/event-sourcing/latest/command-bus.md)
- [Clock](https://patchlevel.dev/docs/event-sourcing/latest/clock.md)
- [CLI](https://patchlevel.dev/docs/event-sourcing/latest/cli.md)
- [Aggregate](https://patchlevel.dev/docs/event-sourcing/latest/aggregate.md)
- [Agg
…

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