Papi is a tool for developers who build and manage structured content on PHP-based content management systems. It provides a programmatic method for defining custom fields and page types, moving this configuration out of the admin interface and into version-controlled code.

• Code-Based Configuration: Define all custom fields, page types, and their properties directly in PHP files. This integrates with development workflows, allowing for version control, easier team collaboration, and deployment through standard processes.
• Clean Database Storage: The system saves only the raw values entered into custom fields. It does not store metadata about the field types or structures in the database, which results in a simpler database schema and can make site migrations or starting with a fresh database more straightforward.
• Native Admin Interface Integration: While the setup is code-driven, the editing interface for content managers mirrors the standard system admin. Custom fields appear as native form elements, providing a familiar editing experience without requiring training on a new UI.
• Page Type Selection: When creating new content, users can select from pre-defined page types that are bound to specific post types. This enforces consistent templates and field sets for different kinds of content directly within the standard publishing workflow.
• Open Source Project: It is freely available as an open-source project, encouraging community use, review, and contribution.