/**
 * Rotation scheduler — ADR-301 content ratio, enforced structurally.
 *
 *   - Educational: at least 4 of every 5 rotation slots.
 *   - Promotional: at most 1 of every 5 slots (slot % 5 === 4), and only
 *     when no promotion has shown in the last 30 minutes.
 *   - Deterministic: selection is a pure function of (time slot, registry,
 *     last-promo state) — no Math.random, so renders are reproducible and
 *     the statusline cache can't skew the ratio.
 */
import type { FunnelMessage } from './types.js';
/** One rotation slot — ADR-301 allows 15–30s; 20s sits inside the band. */
export declare const ROTATION_SLOT_MS = 20000;
/** The same promotion appears at most once every 30 minutes (ADR-301). */
export declare const PROMO_REPEAT_CAP_MS: number;
/** 1 promotional slot per 5 (ADR-301: ≤ 1 in 5 rotations). */
export declare const PROMO_SLOT_MODULO = 5;
export declare function selectMessage(now?: Date, release?: string): FunnelMessage | null;
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