import type { DelegationMeta, RootBudget, SessionStats } from "./types.js";
export declare class TaskStateManager {
    private readonly rootBudgets;
    private readonly sessionToRoot;
    private readonly sessionStats;
    private readonly sessionDelegationMeta;
    private readonly subagentSessions;
    ensureStats(sessionID: string): SessionStats;
    getStats(sessionID: string): SessionStats | undefined;
    addWarning(sessionID: string, warning: string): void;
    resetStats(sessionID: string): SessionStats;
    private ensureRootBudget;
    getRootBudget(rootID: string): RootBudget | undefined;
    reserveDescendant(rootID: string, maxDescendantsPerRoot: number): number;
    commitDescendant(rootID: string, sessionID: string): number;
    rollbackReservation(rootID: string): void;
    setSessionRoot(sessionID: string, rootID: string): void;
    getSessionRoot(sessionID: string): string | undefined;
    inheritRootFromParent(sessionID: string, parentID: string): void;
    getDelegationMeta(sessionID: string): DelegationMeta | undefined;
    setDelegationMeta(sessionID: string, meta: DelegationMeta): void;
    hydrateDelegationState(sessionID: string, meta: DelegationMeta): void;
    registerSubagent(parentID: string, childID: string): void;
    getSubagents(parentID: string): Set<string>;
    forgetSession(sessionID: string): void;
    clear(): void;
}
export declare const taskState: TaskStateManager;
export declare function ensureSessionStats(sessionID: string): SessionStats;
export declare function getSessionStats(sessionID: string): SessionStats | undefined;
export declare function addWarning(sessionID: string, warning: string): void;
export declare function reserveDescendant(rootID: string, maxDescendantsPerRoot: number): number;
export declare function commitDescendant(rootID: string, sessionID: string): number;
export declare function rollbackReservation(rootID: string): void;
export declare function forgetSession(sessionID: string): void;
export declare function getDelegationMeta(sessionID: string): DelegationMeta | undefined;
export declare function setDelegationMeta(sessionID: string, meta: DelegationMeta): void;
export declare function hydrateDelegationState(sessionID: string, meta: DelegationMeta): void;
export declare function inheritRootFromParent(sessionID: string, parentID: string): void;
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