import type { PromptAnalysis } from "./types.js";
export interface GateResult {
    allow: boolean;
    score: number;
    grade: PromptAnalysis["grade"];
    analysis: PromptAnalysis;
    /** Human-readable reason when allow=false */
    reason?: string;
}
export interface PromptGate {
    /** Check a prompt against the threshold. Returns allow=false if below minimum score. */
    check(prompt: string): GateResult;
    /** Convenience: throws if prompt is blocked (useful in middleware). */
    assert(prompt: string): void;
}
/**
 * Create a prompt quality gate for use in proxy middleware.
 *
 * @param minScore  Minimum acceptable score (0-100). Default: 40.
 * @param warnOnly  If true, allow=true but result.reason is still set (warn-only mode). Default: false.
 *
 * Usage in Maiife proxy (7th policy type: prompt_quality):
 *   const gate = createPromptGate({ minScore: policy.minScore, warnOnly: policy.action === "warn" });
 *   const result = gate.check(request.prompt);
 *   if (!result.allow) return policyDenyResponse(result.reason);
 */
export declare function createPromptGate(options?: {
    minScore?: number;
    warnOnly?: boolean;
}): PromptGate;
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