> For the complete documentation index, see [llms.txt](https://docs.sonsofphp.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.sonsofphp.com/contracts.md).

# Contracts

- [Contracts Overview](https://docs.sonsofphp.com/contracts/index.md)
- [Common](https://docs.sonsofphp.com/contracts/common.md): PHP Common Contracts
- [Cookie](https://docs.sonsofphp.com/contracts/cookie.md)
- [CQRS](https://docs.sonsofphp.com/contracts/cqrs.md)
- [Filesystem](https://docs.sonsofphp.com/contracts/filesystem.md)
- [Mailer](https://docs.sonsofphp.com/contracts/mailer.md)
- [Pager](https://docs.sonsofphp.com/contracts/pager.md)
- [Registry](https://docs.sonsofphp.com/contracts/registry.md)
- [State Machine](https://docs.sonsofphp.com/contracts/state-machine.md)