import type { Observation, ObservationIndex, Session, SessionSummary } from "../types";
import { type ScoringContext } from "./relevance";
/** Token-budgeted context payload injected into the system prompt. */
export interface ProgressiveContext {
    recentSummaries: SessionSummary[];
    observationIndex: ObservationIndex[];
    fullObservations: Observation[];
    totalTokens: number;
}
/**
 * Select summaries and observation-index entries that fit within the
 * token budget. Summaries are higher priority (richer context).
 *
 * When `scoringContext` is provided, observations are sorted by relevance
 * score (descending) before applying the token budget — prioritizing
 * recent, important entries. Without it, chronological order is preserved.
 */
export declare function buildProgressiveContext(_recentSessions: ReadonlyArray<Session>, summaries: ReadonlyArray<SessionSummary>, observationIndex: ReadonlyArray<ObservationIndex>, maxTokens: number, fullObservations?: ReadonlyArray<Observation>, scoringContext?: ScoringContext): ProgressiveContext;
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