AgentContentPart

Provider-neutral text, image, audio, video, and document content passed from Channel attachments to an agent.

AgentContentPart is the multimodal prompt union used by Channels.

type MediaDataSource = {
  type: "data";
  value: string;
  mimeType: string;
};

type AgentContentPart =
  | { type: "text"; text: string }
  | { type: "image"; source: MediaDataSource }
  | { type: "audio"; source: MediaDataSource }
  | { type: "video"; source: MediaDataSource }
  | { type: "document"; source: MediaDataSource };

Binary value is base64. Managed ingress maps image, audio, video, and PDF files to binary parts, decodes text/* as text, and represents other binary types with a text note.

Pass parts through thread.runAgent({ prompt }). The selected agent framework and model decide which media kinds they can consume.

See Files and multimodal input.