NonStandardContentBlock

Provider-specific content data.

This block contains data for which there is not yet a standard type.

The purpose of this block should be to simply hold a provider-specific payload. If a provider's non-standard output includes reasoning and tool calls, it should be the adapter's job to parse that payload and emit the corresponding standard ReasoningContentBlock and ToolCalls.

Has no extras field, as provider-specific data should be included in the value field.