/**
 * compressContext — thin async wrapper around the token-compression engine.
 *
 * The underlying engine is a zero-dependency ESM module. We load it via a
 * dynamic import so that the CJS host (CommonJS SDK) can consume it without
 * any build-time changes or npm installs.
 */
/** Content type hint for compression strategy selection. */
export type ContentType = "code" | "prose" | "auto";
export interface CompressContextOptions {
    /** Fraction of tokens to remove (0–1). Default: 0.45 */
    targetReduction?: number;
    /** Do not compress if context is shorter than this many tokens. Default: 80 */
    minCompressionTokens?: number;
    /** Maximum number of sentences to keep. Default: 20 */
    maxCompressionSentences?: number;
    /**
     * Content type hint. 'auto' (default) detects source code by heuristic and
     * skips compression for code blobs to preserve keyword density.
     * Set to 'code' to force passthrough, 'prose' to always compress.
     */
    contentType?: ContentType;
}
export interface CompressContextResult {
    /** Compressed (or original, for code passthrough) text. */
    compressedText: string;
    /**
     * Alias for compressedText — provided for callers that destructure
     * { compressedContext } from the result object.
     */
    compressedContext: string;
    originalTokens: number;
    compressedTokens: number;
    reductionRatio: number;
    latencyMs: number;
}
/**
 * Compress `context` by extracting the sentences most relevant to `query`.
 *
 * When contentType is 'auto' (default), source code blobs are detected via
 * heuristic and returned as-is (passthrough) to preserve keyword density.
 * Set contentType='prose' to force compression regardless of content type.
 *
 * @param context  - The raw context string to compress.
 * @param query    - The query / task description used to score relevance.
 * @param options  - Optional tuning knobs (all have sensible defaults).
 * @returns        Compressed text with token-count stats and wall-clock latency.
 */
export declare function compressContext(context: string, query: string, options?: CompressContextOptions): Promise<CompressContextResult>;
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