ReferenceSDK ReferenceChatOutputFormatUser-facing rendering format for chat-triggered agent responses.Copy MarkdownOpenSDK v2026.4.0 Kind: typeAlias Signature ExampleCopyexport type ChatOutputFormat = markdown | text | htmlChatOutputDefinitionDeclarative contract selecting the chat-facing value from final step output.chatTranscriptMessagesReturn normalized prior chat messages from the current step input.