/**
 * review_task tool — Human-in-the-loop approval gate for tasks.
 *
 * Allows a human reviewer to approve, reject, or request changes on
 * tasks that are in `needs_review` status. This enables approval gates
 * before agent work is considered complete.
 *
 * Actions:
 * - "approve"          → marks the task as completed, unblocks dependents
 * - "reject"           → marks the task as revision_requested with feedback
 * - "request_changes"  → marks the task as revision_requested with feedback
 */
import { z } from "zod";
import { Vault } from "../vault.js";
import { Config } from "../config.js";
export declare const reviewTaskSchema: {
    task_id: z.ZodString;
    action: z.ZodEnum<{
        approve: "approve";
        reject: "reject";
        request_changes: "request_changes";
    }>;
    feedback: z.ZodOptional<z.ZodString>;
    reviewer: z.ZodOptional<z.ZodString>;
};
export declare const reviewTaskHandler: (vault: Vault, config: Config) => (input: {
    task_id: string;
    action: "approve" | "reject" | "request_changes";
    feedback?: string;
    reviewer?: string;
}) => Promise<{
    content: {
        type: "text";
        text: string;
    }[];
    isError?: boolean;
}>;
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