import type { CompiledContextPack, ContextPackCommunityContext, ContextPackNode, ContextPackRelationship } from '../contracts/context-pack.js';
export interface DeltaContextPackResult<TNode extends ContextPackNode = ContextPackNode, TRelationship extends ContextPackRelationship = ContextPackRelationship, TCommunity extends ContextPackCommunityContext = ContextPackCommunityContext> {
    /** True iff the input pack overlapped with previously-sent ids. When
     *  false, the delta is identical to the input pack. */
    delta_applied: boolean;
    /** Pack with overlapping nodes + their relationships removed. */
    delta_pack: CompiledContextPack<TNode, TRelationship, TCommunity>;
    /** Node ids the caller already had — surfaced explicitly so the agent
     *  can resolve them from session state instead of re-reading content. */
    referenced_ids: string[];
    /** Bytes-saved estimate (delta vs original JSON length). */
    bytes_saved: number;
}
export declare function computeDeltaContextPack<TNode extends ContextPackNode = ContextPackNode, TRelationship extends ContextPackRelationship = ContextPackRelationship, TCommunity extends ContextPackCommunityContext = ContextPackCommunityContext>(pack: CompiledContextPack<TNode, TRelationship, TCommunity>, previouslySentNodeIds: ReadonlyArray<string>): DeltaContextPackResult<TNode, TRelationship, TCommunity>;
/**
 * Convenience overload: extract every `node_id` from a pack. Use this to
 * record what the agent received after each call so the next call's
 * `previouslySentNodeIds` argument is correct.
 */
export declare function collectPackNodeIds<TNode extends ContextPackNode>(pack: CompiledContextPack<TNode>): string[];