/**
 * LLM Guard Interface.
 *
 * Policy decorator over ILlmService that enforces budget limits,
 * per-feature toggles, and usage tracking. All LLM consumers
 * should go through the guard rather than calling ILlmService directly.
 *
 * Part of Phase 6B: Cost/Privacy Controls.
 */
import type { ILlmResponse, ILlmRequestOptions } from './ILlmService';
import type { LlmFeature } from './ILlmUsageTracker';
/**
 * Guarded LLM completion service.
 * Enforces budget, feature toggles, and records usage.
 */
export interface ILlmGuard {
    /**
     * Send a completion request with policy enforcement.
     *
     * @param prompt - The user prompt text
     * @param feature - Which LLM feature is making the request
     * @param options - Optional request overrides
     * @throws LlmFeatureDisabledError if the feature is toggled off
     * @throws LlmBudgetExceededError if over the monthly budget
     * @throws LlmDisabledError if LLM is disabled globally
     * @throws LlmProviderError if the provider returns an error
     */
    complete(prompt: string, feature: LlmFeature, options?: ILlmRequestOptions): Promise<ILlmResponse>;
    /**
     * Check whether a specific LLM feature is enabled.
     * Checks both the master switch and per-feature toggles.
     */
    isFeatureEnabled(feature: LlmFeature): Promise<boolean>;
}
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