1. 1. Overview
2. 2. About the product
   1. 2.1. Use cases
   2. 2.2. How delivery works
   3. 2.3. Delivery semantics
3. 3. Getting started
   1. 3.1. Client configuration
4. 4. Security & Auth
   1. 4.1. Tokens
   2. 4.2. Permissions model
   3. 4.3. Threat model & best practices
5. 5. Channels
   1. 5.1. Channel naming
   2. 5.2. Patterns & matching
6. 6. SDKs
   1. 6.1. WebSocket client
   2. 6.2. gRPC client
7. 7. API
   1. 7.1. REST API
   2. 7.2. gRPC
8. 8. Usage examples
   1. 8.1. Using tenants
   2. 8.2. Channel patterns
9. 9. Operations
   1. 9.1. Observability
   2. 9.2. Limits & scaling
10. 10. Reference
    1. 10.1. Limits
    2. 10.2. Schemas
11. 11. Troubleshooting
    1. 11.1. Error codes