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The phase of an assistant message. Use commentary for an intermediate assistant message and final_answer for the final assistant message. For follow-up requests with models like gpt-5.3-codex and later, preserve and resend phase on all assistant messages. Omitting it can degrade performance. Not used for user messages.

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Supported Types

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OutputMessagePhaseCommentary

outputMessagePhaseUnion := components.CreateOutputMessagePhaseUnionOutputMessagePhaseCommentary(components.OutputMessagePhaseCommentary{/* values here */})

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OutputMessagePhaseFinalAnswer

outputMessagePhaseUnion := components.CreateOutputMessagePhaseUnionOutputMessagePhaseFinalAnswer(components.OutputMessagePhaseFinalAnswer{/* values here */})

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outputMessagePhaseUnion := components.CreateOutputMessagePhaseUnionAny(any{/* values here */})

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Union Discrimination

Use the Type field to determine which variant is active, then access the corresponding field: 
switch outputMessagePhaseUnion.Type {
	case components.OutputMessagePhaseUnionTypeOutputMessagePhaseCommentary:
		// outputMessagePhaseUnion.OutputMessagePhaseCommentary is populated
	case components.OutputMessagePhaseUnionTypeOutputMessagePhaseFinalAnswer:
		// outputMessagePhaseUnion.OutputMessagePhaseFinalAnswer is populated
	case components.OutputMessagePhaseUnionTypeAny:
		// outputMessagePhaseUnion.Any is populated
}