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patchlevel/event-sourcing-phpstan-extension
===========================================

PHPStan that understands your aggregates and catches event sourcing mistakes before runtime

1.3.0(4w ago)158.2k↓59.3%[1 issues](https://github.com/patchlevel/event-sourcing-phpstan-extension/issues)MITPHPPHP ~8.1.0 || ~8.2.0 || ~8.3.0 || ~8.4.0 || ~8.5.0CI passing

Since Aug 13Pushed 2w ago2 watchersCompare

[ Source](https://github.com/patchlevel/event-sourcing-phpstan-extension)[ Packagist](https://packagist.org/packages/patchlevel/event-sourcing-phpstan-extension)[ Docs](https://patchlevel.dev/docs/event-sourcing-phpstan-extension/latest)[ RSS](/packages/patchlevel-event-sourcing-phpstan-extension/feed)WikiDiscussions 1.4.x Synced 1w ago

READMEChangelog (4)Dependencies (16)Versions (15)Used By (0)

[![Latest Stable Version](https://camo.githubusercontent.com/41831f0b9dca8dce09e401bd6ca6feb37453086ceb194984ed28656a44cd1ddc/68747470733a2f2f706f7365722e707567782e6f72672f70617463686c6576656c2f6576656e742d736f757263696e672d7068707374616e2d657874656e73696f6e2f76)](//packagist.org/packages/patchlevel/event-sourcing-phpstan-extension)[![License](https://camo.githubusercontent.com/3094614018c0a260abc1481df34d6887fd219a20bf0421c32bb1596fe94c205d/68747470733a2f2f706f7365722e707567782e6f72672f70617463686c6576656c2f6576656e742d736f757263696e672d7068707374616e2d657874656e73696f6e2f6c6963656e7365)](//packagist.org/packages/patchlevel/event-sourcing-phpstan-extension)

event-sourcing-phpstan-extension
================================

[](#event-sourcing-phpstan-extension)

"PHPStan that understands your aggregates and catches event sourcing mistakes before runtime."

Features
--------

[](#features)

- [Property initialization](https://patchlevel.dev/docs/event-sourcing-phpstan-extension/latest/getting-started#property-initialization) for aggregate roots and child aggregates, so PHPStan does not report false uninitialized property errors.
- [Unused properties](https://patchlevel.dev/docs/event-sourcing-phpstan-extension/latest/getting-started#unused-properties) are reported when no apply method writes them, because such a property can never receive state from an event.
- [Write only properties](https://patchlevel.dev/docs/event-sourcing-phpstan-extension/latest/getting-started#write-only-properties) are reported when apply methods store state that is never read, because state that is not used to check invariants belongs in a projection.
- [Recording in apply methods](https://patchlevel.dev/docs/event-sourcing-phpstan-extension/latest/getting-started#recording-in-apply-methods) is reported as an error, because recording events while replaying them leads to duplicated events.
- [Writing state outside apply methods](https://patchlevel.dev/docs/event-sourcing-phpstan-extension/latest/getting-started#writing-state-outside-apply-methods) is reported as an error, because state that is not derived from an event is lost when the aggregate is reloaded.

Installation
------------

[](#installation)

```
composer require --dev patchlevel/event-sourcing-phpstan-extension
```

If you use [phpstan/extension-installer](https://github.com/phpstan/extension-installer), the extension is registered automatically. Otherwise register it in your `phpstan.neon`:

```
includes:
    - vendor/patchlevel/event-sourcing-phpstan-extension/extension.neon
```

Documentation
-------------

[](#documentation)

- Latest [Docs](https://patchlevel.dev/docs/event-sourcing-phpstan-extension/latest)
- Related [Blog](https://patchlevel.dev/blog)

Integration
-----------

[](#integration)

- [patchlevel/event-sourcing](https://github.com/patchlevel/event-sourcing)

Contributing
------------

[](#contributing)

We are open to contributions as long as they are in line with our [BC-Policy](https://patchlevel.dev/our-backward-compatibility-promise).

Also note that the `composer.lock` is always generated with the newest supported PHP version as this is the version our tools run in the CI.

###  Health Score

49

—

FairBetter than 94% of packages

Maintenance75

Regular maintenance activity

Popularity33

Limited adoption so far

Community11

Small or concentrated contributor base

Maturity62

Established project with proven stability

 Bus Factor1

Top contributor holds 79.2% of commits — single point of failure

How is this calculated?**Maintenance (25%)** — Last commit recency, latest release date, and issue-to-star ratio. Uses a 2-year decay window.

**Popularity (30%)** — Total and monthly downloads, GitHub stars, and forks. Logarithmic scaling prevents top-heavy scores.

**Community (15%)** — Contributors, dependents, forks, watchers, and maintainers. Measures real ecosystem engagement.

**Maturity (30%)** — Project age, version count, PHP version support, and release stability.

###  Release Activity

Cadence

Every ~40 days

Recently: every ~27 days

Total

10

Last Release

10d ago

Major Versions

1.1.x-dev → 2.0.x-dev2025-12-04

PHP version history (2 changes)1.0.0PHP ~8.1 || ~8.2 || ~8.3 || 8.4

1.1.0PHP ~8.1.0 || ~8.2.0 || ~8.3.0 || ~8.4.0 || ~8.5.0

### Community

Maintainers

![](https://avatars.githubusercontent.com/u/470138?v=4)[David Badura](/maintainers/DavidBadura)[@DavidBadura](https://github.com/DavidBadura)

---

Top Contributors

[![renovate[bot]](https://avatars.githubusercontent.com/in/2740?v=4)](https://github.com/renovate[bot] "renovate[bot] (152 commits)")[![DanielBadura](https://avatars.githubusercontent.com/u/2017762?v=4)](https://github.com/DanielBadura "DanielBadura (28 commits)")[![DavidBadura](https://avatars.githubusercontent.com/u/470138?v=4)](https://github.com/DavidBadura "DavidBadura (12 commits)")

---

Tags

PHPStanstatic analysisevent sourcingpatchlevelaggregate

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