# Editor State Rules

- `editor/` owns transient app/editor state types and the app store.
- Transient state includes viewport/camera, selection, tools, active entities, and drag/session state.
- Do not put persisted document fields here; use `core/` for saved image document state.
- Do not import React, renderer/WebGL, storage, network, or filesystem APIs.
- The store must expose read/subscribe and command dispatch only; no public direct setters.
- State changes must flow through commands, including viewport/camera changes.