/**
 * Hook Event Payload Validators
 *
 * Type-predicate validators for each hook event family.
 * Validation runs at mediated ingress (MessageBus path) before planning.
 *
 * @plan PLAN-20250218-HOOKSYSTEM.P09
 * @plan PLAN-20250218-HOOKSYSTEM.P11
 * @requirement DELTA-HPAY-001, DELTA-HPAY-005
 */
import type { BeforeToolInput, AfterToolInput, BeforeAgentInput, AfterAgentInput, BeforeModelInput, AfterModelInput, BeforeToolSelectionInput, NotificationInput } from './types.js';
/**
 * Type guard: checks if value is a non-null, non-array object.
 *
 * @plan PLAN-20250218-HOOKSYSTEM.P11
 * @requirement DELTA-HPAY-005
 */
export declare function isObject(value: unknown): value is Record<string, unknown>;
/**
 * Type guard: checks if value is a non-empty string.
 *
 * @plan PLAN-20250218-HOOKSYSTEM.P11
 * @requirement DELTA-HPAY-005
 */
export declare function isNonEmptyString(value: unknown): value is string;
/**
 * Validates BeforeTool event input.
 * Required fields: tool_name (non-empty string), tool_input (object)
 *
 * @plan PLAN-20250218-HOOKSYSTEM.P11
 * @requirement DELTA-HPAY-001, DELTA-HPAY-005
 */
export declare function validateBeforeToolInput(input: unknown): input is BeforeToolInput;
/**
 * Validates AfterTool event input.
 * Required fields: tool_name (non-empty string), tool_input (object), tool_response (object)
 *
 * @plan PLAN-20250218-HOOKSYSTEM.P11
 * @requirement DELTA-HPAY-001, DELTA-HPAY-005
 */
export declare function validateAfterToolInput(input: unknown): input is AfterToolInput;
/**
 * Validates BeforeAgent event input.
 * Required fields: prompt (string)
 *
 * @plan PLAN-20250218-HOOKSYSTEM.P11
 * @requirement DELTA-HPAY-001, DELTA-HPAY-005
 */
export declare function validateBeforeAgentInput(input: unknown): input is BeforeAgentInput;
/**
 * Validates AfterAgent event input.
 * Required fields: prompt (string), prompt_response (string), stop_hook_active (boolean)
 *
 * @plan PLAN-20250218-HOOKSYSTEM.P11
 * @requirement DELTA-HPAY-001, DELTA-HPAY-005
 */
export declare function validateAfterAgentInput(input: unknown): input is AfterAgentInput;
/**
 * Validates BeforeModel event input.
 * Required fields: llm_request (object)
 *
 * @plan PLAN-20250218-HOOKSYSTEM.P11
 * @requirement DELTA-HPAY-001, DELTA-HPAY-005
 */
export declare function validateBeforeModelInput(input: unknown): input is BeforeModelInput;
/**
 * Validates AfterModel event input.
 * Required fields: llm_request (object), llm_response (object)
 *
 * @plan PLAN-20250218-HOOKSYSTEM.P11
 * @requirement DELTA-HPAY-001, DELTA-HPAY-005
 */
export declare function validateAfterModelInput(input: unknown): input is AfterModelInput;
/**
 * Validates BeforeToolSelection event input.
 * Required fields: llm_request (object)
 *
 * @plan PLAN-20250218-HOOKSYSTEM.P11
 * @requirement DELTA-HPAY-001, DELTA-HPAY-005
 */
export declare function validateBeforeToolSelectionInput(input: unknown): input is BeforeToolSelectionInput;
/**
 * Validates Notification event input.
 * Required fields: notification_type (enum), message (non-empty string), details (object)
 *
 * @plan PLAN-20250218-HOOKSYSTEM.P11
 * @requirement DELTA-HPAY-001, DELTA-HPAY-005
 */
export declare function validateNotificationInput(input: unknown): input is NotificationInput;