Package:
@hexos/react-coreDiscriminated union of structured content parts within an AgentMessage.
Enables rich message rendering: text blocks, tool call/result pairs, reasoning
(extended thinking), and inline images. The type field discriminates each variant.
Related: ToolCallState tracks tool execution progress, MessageBubble renders parts, ReasoningDisplay shows reasoning blocks.
type MessagePart = | { type: 'text'; content: string }
| { type: 'tool-call'; toolCallId: string; toolName: string; args: unknown; state: ToolCallState }
| { type: 'tool-result'; toolCallId: string; result: unknown }
| { type: 'reasoning'; content: string; isVisible: boolean }
| { type: 'image'; url: string; alt?: string }