import type { ContextSessionDelta, ContextSessionState } from '../contracts/context-session.js';
export interface ContextSessionRefInput {
    ref: string;
    content: string;
    token_count?: number;
}
export declare function createContextSessionState(): ContextSessionState;
export declare function buildContextSession(refs: readonly ContextSessionRefInput[], previous: ContextSessionState | undefined): {
    session_state: ContextSessionState;
    session_delta: ContextSessionDelta;
};