/**
 * The product-lifetime bound on an explicitly internal-beta capability. Past this
 * date `enable` refuses AND an existing flag stops being honored, so FORGETTING
 * THIS TURNS THE FEATURE OFF — the safe direction.
 *
 * This is deliberately a constant in shipped code rather than a CI test with a
 * hard-coded date: such a test fires in an uninvolved engineer's lap at a moment
 * with no context, and the cheapest green is bumping the constant. Reaching this
 * date is a decision to make (extend, or remove the feature), not a number to
 * raise.
 */
export declare const DX_UNATTENDED_SUNSET: number;
export interface Enablement {
    enabled: boolean;
    /** The raw ISO8601 grant time. Present only when `enabled` is true. */
    at?: string;
}
/**
 * Decide enablement from an already-parsed config object. Pure, and STRICT:
 * identity against `true`, never truthiness.
 *
 * Truthiness fails OPEN on `"false"`, `"0"`, `{}`, `[]`, `1`, and `"garbage"` —
 * every one of those is truthy in JavaScript. The worst is `"false"`, which is
 * what a person hand-editing this file writes when they are trying to turn the
 * feature OFF; `{}` is what a refactor grouping the two fields produces. A gate
 * that reads a creator's "off" as "on" is inverted, not merely loose.
 */
export declare function readEnablement(cfg: unknown, now: number): Enablement;
/**
 * Read enablement from the real machine config.
 *
 * Wrapped in its OWN try/catch, independent of the auth read, because
 * `readJsonIfExists` rethrows everything that is not ENOENT: a truncated
 * config.json must DISABLE the relaxation, not throw through it and take an
 * unrelated verb down with it.
 */
export declare function loadEnablement(now: number): Promise<Enablement>;
/** Whole days elapsed, floored, never negative — a clock skew must not print `(-2 days)`. */
export declare function ageInDays(at: string, now: number): number;
/** The calendar day of the grant, in UTC. The time of day is noise at this age scale. */
export declare function grantedOn(at: string): string;
/**
 * The one visibility line, in the single pinned shape every human surface uses:
 *
 *   Unattended send: ENABLED since 2026-04-01 (145 days)
 *
 * Returns undefined when not enabled. Nothing is printed in that case, on
 * purpose: a line that prints unconditionally is a line readers learn to skip,
 * which would cost exactly the attention the enabled line needs.
 */
export declare function enablementLine(e: Enablement, now: number): string | undefined;