# State models

Auto-generated reference for JBrowse's [MobX state-tree](https://jbrowse.org/jb2-staging/docs/developer_guide)
models: the views, tracks, displays, sessions, and mixins that make up a running
app, along with their properties, actions, and views. These pages are generated
from the model definitions in the source, so they always match the current
release.

For how these fit together and how to extend them, see the
[developer guide](https://jbrowse.org/jb2-staging/docs/developer_guide).

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