/**
 * [WHO]: Pure formatting helpers for goal display: formatGoalElapsedSeconds, formatTokens, goalStatusLabel, goalUsageSummary, goalSummaryLines, goalStatusIndicator, shouldConfirmBeforeReplacing, editedGoalStatus, validateObjective, validateBudget
 * [FROM]: Depends on ./goal-types
 * [TO]: Consumed by ./goal-command, ./goal-tools, ./index (status line)
 * [HERE]: extensions/builtin/goal/goal-format.ts - display & validation boundary; no I/O
 */
import { type ThreadGoal, type ThreadGoalStatus } from "./goal-types.js";
export declare function formatGoalElapsedSeconds(seconds: number): string;
export declare function formatTokens(tokens: number): string;
export declare function goalStatusLabel(status: ThreadGoalStatus): string;
export interface GoalUsageSummary {
    elapsed: string;
    tokensLabel: string;
    tokensUsed: string;
    tokensBudget: string;
    hasBudget: boolean;
}
export declare function goalUsageSummary(goal: ThreadGoal): GoalUsageSummary;
export declare function goalSummaryLines(goal: ThreadGoal): string[];
export type GoalStatusIndicator = {
    type: "Active";
    usage: string;
} | {
    type: "Paused";
} | {
    type: "Blocked";
} | {
    type: "UsageLimited";
} | {
    type: "BudgetLimited";
    usage: string | null;
} | {
    type: "Complete";
    usage: string;
};
export declare function goalStatusIndicator(goal: ThreadGoal, activeTurnStartedAt: number | null): GoalStatusIndicator;
export declare function shouldConfirmBeforeReplacing(goal: ThreadGoal): boolean;
export declare function editedGoalStatus(status: ThreadGoalStatus): ThreadGoalStatus;
export declare function validateObjective(input: string): {
    ok: true;
    value: string;
} | {
    ok: false;
    reason: string;
};
export declare function validateBudget(input: number | null | undefined): {
    ok: true;
    value: number | null;
} | {
    ok: false;
    reason: string;
};