import type { IntentRequest, CapabilityInvocation } from "../types/index.js";
/** Validation error */
export type ValidationError = {
    field: string;
    message: string;
    severity: "error" | "warning";
};
/** Validation result */
export type ValidationResult = {
    valid: boolean;
    errors: ValidationError[];
};
/** Validate an intent request */
export declare function validateIntentRequest(req: IntentRequest): ValidationResult;
/** Validate a capability invocation */
export declare function validateInvocation(invocation: CapabilityInvocation): ValidationResult;
/** Check if payload matches expected schema (basic type checking) */
export declare function validatePayloadSchema(payload: Record<string, unknown>, schema: {
    required?: string[];
    types?: Record<string, string>;
}): ValidationResult;
/** Compose multiple validators into one */
export declare function composeValidators(...validators: ((req: IntentRequest) => ValidationResult)[]): (req: IntentRequest) => ValidationResult;