import type { Activity } from '../../shared/activity.js';
import { AgentUsageStore } from '../storage/schema/agent-usage.store.js';
import { SessionStore, type ArchivedProviderSession, type ProviderSession, type Session } from '../storage/schema/session.store.js';
import type { ProviderSessionRecord } from '../providers/contract.js';
export type { ProviderSession, Session };
export interface RecoveredProviderSession {
    archived: ArchivedProviderSession;
    session: Session;
}
export declare class RuntimeSessionService {
    private readonly agentId;
    private readonly sessionStore;
    private readonly usageStore;
    constructor(agentId: string, sessionStore?: SessionStore, usageStore?: AgentUsageStore);
    upsertPrimarySession(): Promise<Session>;
    persistProviderSession(kind: string, session: ProviderSessionRecord): Promise<Session | undefined>;
    archiveCorruptProviderSession(kind: string, providerSessionId: string, note: string): Promise<RecoveredProviderSession | undefined>;
    updateRuntimeStats(runtimeKind: string, runtimeEnv: Record<string, string> | undefined, activity: Activity): Promise<Session | undefined>;
    readLifetimeTokens(): Promise<number | undefined>;
    recordLifetimeTokenUsageForItem(itemId: string): Promise<number | undefined>;
    private readUsage;
}
export declare function runtimeSessionServiceForAgent(agentId: string): RuntimeSessionService;
export declare function tokenDeltaForActivities(activities: Activity[]): number | undefined;
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