curl --request PATCH \
  --url https://prod.featherhq.com/api/v1/agents/{agentId}/versions/{versionId} \
  --header 'Content-Type: application/json' \
  --header 'X-API-Key: <api-key>' \
  --data '{
  "mode": "FLOW",
  "flows": {
    "blocks": [
      {
        "blockId": "<string>",
        "blockType": "prompt",
        "systemPrompt": "<string>",
        "variables": [
          {
            "name": "<string>",
            "required": true,
            "defaultValue": "<string>"
          }
        ],
        "loop": false,
        "tools": [],
        "nextBlocks": [],
        "metadata": {},
        "inputCaptureType": "phone",
        "transferNumber": "<string>"
      }
    ],
    "startBlockId": "<string>",
    "systemPrompt": "<string>",
    "variables": [
      {
        "name": "<string>",
        "required": true,
        "defaultValue": "<string>"
      }
    ],
    "allVariables": [
      {
        "name": "<string>",
        "required": true,
        "defaultValue": "<string>"
      }
    ]
  },
  "prompt": {
    "system": "<string>",
    "systemUIFormatting": "<any>",
    "variables": [
      {
        "name": "<string>",
        "required": true,
        "defaultValue": "<string>"
      }
    ],
    "tools": [
      "<string>"
    ],
    "preBuiltTools": [
      "<string>"
    ]
  },
  "sttConfigId": "<string>",
  "ttsConfigId": "<string>",
  "llmConfigId": "<string>",
  "overrideSTTConfig": {},
  "overrideTTSConfig": {},
  "overrideLLMConfig": {},
  "voiceId": "<string>",
  "channels": [
    "INBOUND_CALL"
  ],
  "postCallPrompt": "<string>",
  "knowledgeBaseCollectionIds": [
    "<string>"
  ],
  "voicemailMessage": "<string>",
  "useKnowledgeBase": true,
  "enableBackgroundAudio": true,
  "backgroundAudio": 50,
  "rotationStrategy": "ROUND_ROBIN",
  "forwardingPhoneNumber": "<string>",
  "postCallVariables": [
    {
      "variableName": "<string>",
      "type": "STRING",
      "description": "<string>",
      "required": false
    }
  ]
}'

{
  "version": {
    "id": "<string>",
    "version": 123,
    "createdAt": "2023-11-07T05:31:56Z",
    "updatedAt": "2023-11-07T05:31:56Z",
    "mode": "FLOW",
    "flows": {
      "blocks": [
        {
          "blockId": "<string>",
          "blockType": "prompt",
          "systemPrompt": "<string>",
          "variables": [
            {
              "name": "<string>",
              "required": true,
              "defaultValue": "<string>"
            }
          ],
          "loop": false,
          "tools": [],
          "nextBlocks": [],
          "metadata": {},
          "inputCaptureType": "phone",
          "transferNumber": "<string>"
        }
      ],
      "startBlockId": "<string>",
      "systemPrompt": "<string>",
      "variables": [
        {
          "name": "<string>",
          "required": true,
          "defaultValue": "<string>"
        }
      ],
      "allVariables": [
        {
          "name": "<string>",
          "required": true,
          "defaultValue": "<string>"
        }
      ]
    },
    "prompt": {
      "system": "<string>",
      "systemUIFormatting": "<any>",
      "variables": [
        {
          "name": "<string>",
          "required": true,
          "defaultValue": "<string>"
        }
      ],
      "tools": [
        "<string>"
      ],
      "preBuiltTools": [
        "<string>"
      ]
    },
    "sttConfigId": "<string>",
    "ttsConfigId": "<string>",
    "llmConfigId": "<string>",
    "overrideSTTConfig": {},
    "overrideTTSConfig": {},
    "overrideLLMConfig": {},
    "voiceId": "<string>",
    "channels": [
      "INBOUND_CALL"
    ],
    "postCallPrompt": "<string>",
    "postCallVariables": [
      {
        "variableName": "<string>",
        "type": "STRING",
        "description": "<string>",
        "required": false
      }
    ],
    "knowledgeBaseCollectionIds": [
      "<string>"
    ],
    "voicemailMessage": "<string>",
    "useKnowledgeBase": true,
    "enableBackgroundAudio": false,
    "backgroundAudio": 50,
    "rotationStrategy": "ROUND_ROBIN",
    "forwardingPhoneNumber": "<string>"
  }
}