Phials developer documentation

This section is for contributors and plugin authors: the plugin architecture, APIs, and how to ship extensions that run inside Phials.

Building plugins → — Overview, getting started, plugin types, lifecycle, and the public API contract.

Session state → — Contributor notes for session JSON (including favorites shape and normalization).

End-user guides (collections, vials, previews, settings) live in the Phials user doc set on docs.phoundry.app; use the site header to switch between user and developer docs.