/**
 * Context store abstraction (Phase 2): the operational index for context item metadata,
 * retention/policy decisions, and retrieval records. Per memory-architecture.md, this is
 * an index/state/cache layer, not the sole audit source — transcript and artifacts remain
 * canonical. An in-memory implementation is provided for tests; sqlite-runtime-index.ts
 * provides an explicit SQLite implementation for callers that opt into it.
 *
 * Nothing here is wired into session persistence or prompt construction by default yet.
 */
import type { ContextItem } from "./context-item.ts";
import type { PolicyDecision } from "./policy-types.ts";
export type RetrievalSliceKind = "metadata" | "preview" | "lines_around_error" | "file_range" | "search_sample" | "transcript_slice" | "full_artifact";
export interface RetrievalRecord {
    id: string;
    contextItemId: string;
    requestedAtTurn: number;
    sliceKind: RetrievalSliceKind;
    resultSummary: string;
}
export interface PolicyDecisionRecord {
    id: string;
    contextItemId?: string;
    decision: PolicyDecision;
    recordedAtTurn: number;
}
export interface ContextStore {
    upsertItem(item: ContextItem): void;
    getItem(id: string): ContextItem | undefined;
    listItems(): ContextItem[];
    removeItem(id: string): void;
    recordPolicyDecision(record: PolicyDecisionRecord): void;
    listPolicyDecisions(contextItemId?: string): PolicyDecisionRecord[];
    recordRetrieval(record: RetrievalRecord): void;
    listRetrievals(contextItemId?: string): RetrievalRecord[];
}
export declare function createInMemoryContextStore(): ContextStore;
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