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24ba1f5 | 1 2 3 4 5 6 7 8 9 10 11 12 13 | # KB: Domain Router
The **Domain Router** is the traffic controller of the EbookBuilder ecosystem, responsible for directing requests to the correct agent or service based on the context of the task.
## Functions
- **Contextual Routing**: Analyzes incoming user prompts to determine if they need a "Creative Writer", an "API Wizard", or a "Technical Editor".
- **Multi-Tenant Support**: Maps custom subdomains (e.g., `user-1.ebookbuilder.com`) to specific Hugging Face Space instances.
- **Load Balancing**: Distributes heavy generation tasks across multiple backend model endpoints to maintain responsiveness.
## Architecture
- **Layer 7 Routing**: Operates at the application level to inspect headers and path parameters.
- **Failover Logic**: If a specific model provider is down, the router automatically switches to a fallback (e.g., switching from Vertex AI to Hugging Face Inference Endpoints).
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