/**
 * "+Nk" turn token-budget directive.
 *
 * A standalone `+<number>[k|m]` token in the user's message sets a per-turn
 * output-token budget surfaced by the `eval` `budget` helper. By default it is
 * ADVISORY — the model self-limits via `budget.remaining()`. Append `!`
 * (`+500k!`) to make it a HARD ceiling: eval `agent()` refuses to spawn once the
 * turn's spend reaches it. Matching is anchored to token boundaries so it does
 * not fire on prices or version strings embedded in prose.
 */
export interface TurnBudget {
    /** Output-token ceiling for the turn. */
    total: number;
    /** Whether the ceiling is enforced (eval `agent()` throws past it) vs advisory. */
    hard: boolean;
}
/** Parse a `+Nk`/`+N`/`+Nm`(`!`) turn-budget directive from `text`, or null when absent. */
export declare function parseTurnBudget(text: string): TurnBudget | null;