Agentgateway Llm Backend Structure

{
  "$schema": "https://json-structure.org/meta/core/v0/#",
  "$id": "https://raw.githubusercontent.com/api-evangelist/agentgateway/refs/heads/main/json-structure/agentgateway-llm-backend-structure.json",
  "name": "LLMBackend",
  "description": "Configuration for an LLM provider backend in AgentGateway, defining the target model, authentication, and routing parameters.",
  "type": "object",
  "properties": {
    "name": {
      "type": "string",
      "description": "Unique name for this LLM backend.",
      "example": "openai-gpt4"
    },
    "provider": {
      "type": "string",
      "description": "The LLM provider for this backend.",
      "enum": [
        "openai",
        "anthropic",
        "gemini",
        "bedrock",
        "azure-openai",
        "ollama",
        "vllm"
      ],
      "example": "openai"
    },
    "model": {
      "type": "string",
      "description": "The model identifier to use for requests.",
      "example": "gpt-4o"
    },
    "alias": {
      "type": "string",
      "description": "Optional alias exposed to clients instead of the actual model name.",
      "example": "primary-llm"
    },
    "baseUrl": {
      "type": "uri",
      "description": "Base URL for the LLM provider API endpoint.",
      "example": "https://api.openai.com/v1"
    },
    "authentication": {
      "type": "object",
      "description": "Authentication configuration for this backend.",
      "properties": {
        "type": {
          "type": "string",
          "enum": [
            "bearer",
            "apikey",
            "basic"
          ],
          "example": "bearer"
        },
        "secretRef": {
          "type": "string",
          "description": "Reference to a secret containing the API key.",
          "example": "openai-api-key"
        }
      }
    },
    "weight": {
      "type": "int32",
      "description": "Load balancing weight for this backend (higher means more traffic).",
      "example": 100
    },
    "priority": {
      "type": "int32",
      "description": "Failover priority, lower values have higher priority.",
      "example": 1
    }
  },
  "required": [
    "name",
    "provider",
    "model"
  ]
}