Function collapseMessagesToInput

apps/sim/providers/gemini/core.ts:437–465

* Collapses a ProviderRequest into a single input string and optional system instruction * for the Interactions API, which takes a flat input rather than a messages array. * * Deep research is single-turn only — it takes one research query and returns a report. * Memory/conversation history is h

(request: ProviderRequest)

 * the last user message is used as input. System messages are passed via system_instruction.
 */
function collapseMessagesToInput(request: ProviderRequest): {
  input: string
  systemInstruction: string | undefined
} {
  const systemParts: string[] = []
  const userParts: string[] = []

  if (request.systemPrompt) {
    systemParts.push(request.systemPrompt)
  }

  if (request.messages) {
    for (const msg of request.messages) {
      if (msg.role === 'system' && msg.content) {
        systemParts.push(msg.content)
      } else if (msg.role === 'user' && msg.content) {
        userParts.push(msg.content)
      }
    }
  }

  return {
    input:
      userParts.length > 0
        ? userParts[userParts.length - 1]
        : 'Please conduct research on the provided topic.',
    systemInstruction: systemParts.length > 0 ? systemParts.join('\n\n') : undefined,
  }
}

/**
 * Extracts text content from a completed interaction's outputs array.