Function toolCallIdToName

packages/kosong/src/providers/google-genai.ts:146–158

(toolCallId: string, toolNameById: Map<string, string>)

}

function toolCallIdToName(toolCallId: string, toolNameById: Map<string, string>): string {
  const name = toolNameById.get(toolCallId);
  if (name !== undefined) return name;
  // Fallback: ids produced by this provider follow the format
  // "{tool_name}_{id_suffix}" where `tool_name` may itself contain
  // underscores (e.g. `fetch_image`) and `id_suffix` is a single trailing
  // token without underscores (e.g. a random hex / UUID fragment). We strip
  // the last "_<suffix>" segment by matching it explicitly — splitting on
  // the first underscore would truncate multi-word tool names like
  // `fetch_image_<id>` to just `fetch`.
  const match = /^(.+)_[^_]+$/.exec(toolCallId);
  return match?.[1] ?? toolCallId;
}

/**
 * Convert a data URL or HTTP URL to a Google GenAI inline/file data part.