export interface ContextSessionStoredRef {
    hash: string;
    token_count: number;
}
export interface ContextSessionState {
    version: 1;
    revision: number;
    refs: Record<string, ContextSessionStoredRef>;
}
export interface ContextSessionDeltaRef {
    ref: string;
    hash: string;
    token_count: number;
    content: string;
}
export interface ContextSessionDelta {
    version: 1;
    previous_revision: number | null;
    next_revision: number;
    added: ContextSessionDeltaRef[];
    updated: ContextSessionDeltaRef[];
    invalidated: string[];
    reused_refs: string[];
    reused_token_count: number;
}
export interface ContextSessionDiagnostics {
    mode: 'initial' | 'follow_up';
    previous_revision: number | null;
    reused_refs: string[];
    added_refs: string[];
    updated_refs: string[];
    invalidated_refs: string[];
    reused_context_tokens: number;
    effective_token_count: number;
}