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Keep large tool results out of model context while retaining full output in attachment storage.
middleware.ToolResponseMiddleware limits successful tool results before they enter history or a durable journal. It measures text bytes or the JSON encoding of multipart output. Control fields such as IDs, state updates, interruptions, and background task metadata are preserved.
Import pkg/agents/middleware and pkg/agents. With store implementing attachments.UploadStore:
config.Middlewares = []agents.Middleware{
middleware.NewToolResponseMiddleware(middleware.ToolResponseMiddlewareConfig{
Store: store,
MaxResponseBytes: 32 << 10,
MaxSummaryBytes: 2 << 10,
}),
middleware.NewAttachmentMiddleware(middleware.AttachmentMiddlewareConfig{
Store: store,
}),
}