I've migrated my BYOM config for LM Studio and the qwen/qwen3.6-27b model to the Custom Endpoint and chat-completions API now that the openai compatible API option is deprecated, and things work fine with the following config:

{
  "name": "LM Studio",
  "vendor": "customendpoint",
  "apiKey": "lmstudio",
  "apiType": "chat-completions",
  "models": [
    {
      "id": "qwen/qwen3.6-27b",
      "name": "Qwen 3.6 27B",
      "url": "http://127.0.0.1:1234/v1/chat/completions",
      "toolCalling": true,
      "vision": true,
      "maxInputTokens": 50000
    }
  ]
}

I noticed that if "toolCalling" is not set to true, the model is not listed in Pick Model UI. Is there any documentation that lists what config keys are supported for VS Code Insider's chatLanguageModels.json config file?