import { type GoalCustomEntry, type GoalEntrySource, type GoalResult, type GoalSnapshot, type GoalStatus, type SessionEntryLike, type ThreadGoal } from "./types.js";
export interface ApplyUsageOptions {
    expectedGoalId?: string | null;
    accountBudgetLimited?: boolean;
}
export declare function unixSeconds(): number;
export declare function unixMilliseconds(): number;
export declare function cloneGoal(goal: ThreadGoal): ThreadGoal;
export declare function validateObjective(objective: string): string | null;
export declare function validateTokenBudget(tokenBudget: number | null | undefined): string | null;
export declare function statusAfterBudgetLimit(status: GoalStatus, tokensUsed: number, tokenBudget: number | null): GoalStatus;
export declare function createThreadGoal(objective: string, tokenBudget?: number | null, now?: number): ThreadGoal;
export declare function setEntry(goal: ThreadGoal, source: GoalEntrySource, at?: number): GoalCustomEntry;
export declare function clearEntry(clearedGoalId: string | null, source: GoalEntrySource, at?: number): GoalCustomEntry;
export declare function isGoalCustomEntry(data: unknown): data is GoalCustomEntry;
export declare function isThreadGoal(goal: unknown): goal is ThreadGoal;
export declare function isGoalStatus(status: unknown): status is GoalStatus;
export declare function reconstructGoal(entries: Iterable<SessionEntryLike>): GoalSnapshot;
export declare function createGoal(current: ThreadGoal | null, objective: string, tokenBudget?: number | null): GoalResult;
export declare function replaceGoal(objective: string, tokenBudget?: number | null): GoalResult;
export declare function updateGoalStatus(current: ThreadGoal | null, status: GoalStatus): GoalResult;
export declare function updateGoalBudget(current: ThreadGoal | null, tokenBudget: number | null): GoalResult;
export interface EditGoalInput {
    objective?: string;
    tokenBudget?: number | null;
}
export declare function editGoal(current: ThreadGoal | null, input: EditGoalInput): GoalResult;
export declare function applyUsage(current: ThreadGoal | null, tokensDelta: number, activeSecondsDelta: number, options?: ApplyUsageOptions): {
    goal: ThreadGoal | null;
    changed: boolean;
    crossedBudget: boolean;
};
export declare function goalWithLiveUsage(current: ThreadGoal | null, activeGoalId: string | null, lastAccountedAt: number | null, now?: number): ThreadGoal | null;
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