/**
 * Structured Distillation for trajectory content (#2241 §SOTA — arXiv:2603.13017).
 *
 * The arXiv paper compresses agent exchanges from ~371 to ~38 tokens (11×) using
 * a four-field schema, and reports retrieval MRR going from 0.745 (raw) to
 * 0.759 (distilled) on a 214 K-pair consensus-graded corpus. The schema is
 * domain-portable; we adopt it for trajectory step content so SONA's recall
 * works against a denser, higher-signal representation.
 *
 * This module is the RULE-BASED extractor. A future round can plug in a
 * learned distiller (cross-encoder / LLM); the schema and the harness stay
 * the same so the swap is drop-in.
 *
 * Schema:
 *   summary  — first sentence (capped); the headline of the exchange
 *   detail   — the rest of the content (capped); kept for fidelity
 *   labels   — domain tokens: verbs, nouns, and recognised actions
 *   paths    — file paths and file:line references (high-signal anchors)
 */
/** Distilled trajectory content. */
export interface DistilledContent {
    summary: string;
    detail: string;
    labels: string[];
    paths: string[];
}
/**
 * Distill a raw trajectory step's content into the 4-field schema.
 * Deterministic, dependency-free, sub-millisecond.
 */
export declare function distillTrajectoryContent(raw: string): DistilledContent;
/**
 * Serialise a distilled object into a compact embedding-ready string. The
 * resulting form is what gets embedded for retrieval — labels and paths come
 * first so they get high attention weight in the embedding.
 *
 * The paper's MRR uplift comes from the ordering: high-signal tokens (labels,
 * paths) lead, so the embedder allocates more probability mass to them.
 */
export declare function serialiseDistilled(d: DistilledContent): string;
/** Convenience: distill then serialise. */
export declare function distillAndSerialise(raw: string): string;
/**
 * Compression ratio: raw bytes / distilled bytes. >1 means distilled is
 * smaller. Used by the benchmark harness.
 */
export declare function compressionRatio(raw: string): number;
//# sourceMappingURL=structured-distill.d.ts.map