Messages

Choose message roles and distinguish model input from stored history.

Read the walkthrough before consulting individual signatures.

Public interfaces

Interface	Purpose
AgentMessage	Internal extension input, persisted as agent and sent as user to providers.
AssistantMessage	Model text, reasoning, and complete tool calls.
ImageBytesSource	In-memory encoded image bytes and their MIME type.
ImageContent	One image block in an ordered multimodal message.
ImageDetail	Provider-neutral image fidelity requested from a vision-capable model.
ImageUrlSource	Remote or data URL containing an image.
Message	Common base for user, internal agent, assistant, system, and tool roles.
MessageRole	Roles understood by the provider-neutral agent protocol.
SystemMessage	Application instructions placed before conversational messages.
TextContent	One text block in an ordered multimodal message.
ToolCall	A complete model request to invoke a named tool.
ToolMessage	One tool result returned to the model.
UserMessage	User text or ordered text/image blocks.