/**
 * Summarization Service Interface.
 *
 * Produces LLM-generated summaries of accumulated memory facts.
 * Supports date filtering, topic filtering, and style options.
 *
 * Part of Phase 6B: AI-Powered Memory Summarization.
 */
import type { ILlmUsage } from './ILlmService';
/**
 * Result of a summarization operation.
 */
export interface ISummarizationResult {
    readonly summary: string;
    readonly factCount: number;
    readonly timeRange: {
        readonly from: string;
        readonly to: string;
    };
    readonly topics: readonly string[];
    readonly usage: ILlmUsage;
}
/**
 * Options for summarization.
 */
export interface ISummarizationOptions {
    /** Only include facts created after this date. */
    readonly since?: Date;
    /** Filter facts by topic tag. */
    readonly topic?: string;
    /** Maximum number of facts to send to the LLM (default: 50). */
    readonly maxFacts?: number;
    /** Summary style: concise (2-3 paragraphs) or detailed (4-6 paragraphs). */
    readonly style?: 'concise' | 'detailed';
}
/**
 * Summarization service.
 * Produces LLM-generated digests of project memory facts.
 *
 * Note: Group IDs are no longer used - the git repo provides scoping via git-mem.
 */
export interface ISummarizationService {
    /**
     * Summarize memory facts.
     *
     * @param options - Optional filters and style settings
     * @throws LlmDisabledError if LLM is disabled
     * @throws LlmFeatureDisabledError if summarization feature is disabled
     * @throws LlmBudgetExceededError if monthly budget limit is exceeded
     */
    summarize(options?: ISummarizationOptions): Promise<ISummarizationResult>;
}
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