> ## Documentation Index
> Fetch the complete documentation index at: https://docs.earthity.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Demo mode is read-only

**Status:** `403`

**`field` member:** never present

**Source:** `service_error`

lib/authz.ts DemoReadOnlyError. Every mutation route carries an inline equivalent 403 today (`isDemo` check) — the ServiceError class is the future single home.