Function userMessage

packages/app/src/context/sync-optimistic.test.ts:7–14

(id: string, sessionID: string)

type Text = Extract<Part, { type: "text" }>

const userMessage = (id: string, sessionID: string): Message => ({
  id,
  sessionID,
  role: "user",
  time: { created: 1 },
  agent: "assistant",
  model: { providerID: "openai", modelID: "gpt" },
})

const textPart = (id: string, sessionID: string, messageID: string): Text => ({
  id,