langchain/dist/agents/middleware/autoMode.d.ts

Typescript bindings for langchain

import { AgentMiddleware } from "./types.js";
import { ClientTool } from "@langchain/core/tools";
import { BaseDecisionModel, NoulCriteria } from "@langchain/core/decisions";
export interface AutoModeMiddlewareConfig {
  /**
   * Tool names or tool instances to classify before execution. Unlisted tools
   * are passed to the handler without classification.
   */
  tools: (string | ClientTool)[];
  /** Decision model used to classify tool calls. */
  classifier: BaseDecisionModel;
  /** Classification instructions sent to the decision model. */
  instructions?: string;
  /** Optional descriptions of the blocked and allowed outcomes. */
  criteria?: NoulCriteria | null;
}
/**
 * Allow low-risk tool calls and block risky calls using a decision model (beta).
 *
 * The middleware intercepts explicitly configured tools immediately before
 * execution and asks a `Noul` question for the probability that each call is
 * risky or insufficiently authorized. Calls below 0.5 execute normally. Calls
 * at or above it return an error `ToolMessage` without invoking the tool
 * handler. Tool names not listed in `tools` bypass classification.
 *
 * The classifier receives the proposed tool call, the tool description, and up
 * to 30 recent messages. Classification failures propagate and the tool
 * handler is not called. This middleware blocks calls; it does not request
 * human approval.
 *
 * @example
 * ```ts
 * import { createAgent, autoModeMiddleware } from "langchain";
 *
 * const autoMode = autoModeMiddleware({
 *   tools: [deleteFile],
 *   criteria: {
 *     true: "The call writes, deletes, publishes, or changes access.",
 *     false: "The call only reads public or user-provided data.",
 *   },
 *   classifier,
 * });
 * const agent = createAgent({
 *   model,
 *   tools: [readFile, deleteFile],
 *   middleware: [autoMode],
 * });
 * ```
 *
 * @throws Error if `tools` is empty.
 */
export declare function autoModeMiddleware(config: AutoModeMiddlewareConfig): AgentMiddleware<undefined, undefined, unknown, readonly (import("@langchain/core/tools").ServerTool | ClientTool)[], readonly []>;
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