Documentation / @agentick/google / toGoogleMessages

Function: toGoogleMessages()

toGoogleMessages(messages): object

Defined in: google.ts:518

Transform agentick Message[] into the shape Google's GenAI API expects:

• contents — the conversational turns (user / model)
• systemInstruction — a single string with ALL system messages joined

Google's systemInstruction accepts only one value, but agentick callers can emit multiple role: "system" messages (e.g. an identity block and a separate resource-listing block). A naïve last-write-wins implementation silently drops everything but the final system message — a class of bug that mostly surfaces in production once the system prompt is split. We accumulate ALL system message texts into systemParts and concatenate them with a blank-line separator, mirroring the Anthropic adapter's toAnthropicMessages pattern.

Empty system messages (no text blocks, or all empty after filtering) are skipped so they don't introduce spurious separators.

Parameters

messages

Message[]

Returns

object

contents

contents: any[]

systemInstruction

systemInstruction: string | undefined