import { type CompactionSettings, type SummarizeFn } from '../../context/compaction.js';
import type { ContextPruningSettings, PruneResult } from '../../context/pruning.js';
import type { LLMProvider } from './llm-provider.js';
import type { Message } from '../session/session-jsonl.js';
export type SummarizationStrategyKind = 'client_llm' | 'provider_server_compaction';
export type SummarizationStrategyInput = {
    messages: Message[];
    contextWindowTokens: number;
    pruningSettings?: Partial<ContextPruningSettings>;
    compactionSettings?: Partial<CompactionSettings>;
    systemPrompt?: string;
    charsPerTokenUnit?: number;
    maxTokens?: number;
    skipLlmCompaction?: boolean;
    forceCompaction?: boolean;
    abortSignal?: AbortSignal;
};
export type ProviderServerCompactionPayload = {
    encryptedContent?: string;
    input?: unknown;
    raw?: unknown;
};
export type SummarizationStrategyResult = {
    kind: 'none';
    source: SummarizationStrategyKind;
    pruneResult?: PruneResult;
} | {
    kind: 'client_summary';
    source: 'client_llm';
    summary: string;
    summaryMessage: Message;
    pruneResult: PruneResult;
} | {
    kind: 'provider_compaction';
    source: 'provider_server_compaction';
    compaction: ProviderServerCompactionPayload;
    pruneResult?: PruneResult;
};
export interface SummarizationStrategy {
    readonly id: string;
    readonly kind: SummarizationStrategyKind;
    compact(input: SummarizationStrategyInput): Promise<SummarizationStrategyResult>;
}
export declare function createSummarizeFnFromLlmProvider(params: {
    provider: Pick<LLMProvider, 'complete'>;
    model: string;
}): SummarizeFn;
export declare function createClientLlmSummarizationStrategy(params: {
    summarize: SummarizeFn;
    id?: string;
}): SummarizationStrategy;
export type ProviderServerCompactionFn = (input: SummarizationStrategyInput) => Promise<ProviderServerCompactionPayload | null | undefined>;
export declare function createProviderServerCompactionStrategy(params: {
    compact: ProviderServerCompactionFn;
    id?: string;
}): SummarizationStrategy;
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