/**
 * The gate of a conditional promise (a commitment waiting on the owner): the
 * question from the same message ("你看这样写行吗？你点头后我就…") whose card
 * answer opens or drops it (CREW-440). Pure helpers, no I/O.
 *
 * @module services/open-items/open-item-gate
 */
import type { OwnerDecision } from '../../types/decision.types.js';
import type { RequestOpenItem } from '../../types/v2/open-item.types.js';
/** What a settled (or pending) gate decision means for the promise. */
export type GateVerdict = 'wait' | 'open' | 'skipped' | 'declined';
/**
 * The question item a conditional promise waits behind: `gateItemId`, else
 * (promises stored before CREW-440) the question of the same source message.
 *
 * @param item - The waiting commitment
 * @param items - All items of the request
 * @returns The question item, or null
 */
export declare function siblingQuestion(item: RequestOpenItem, items: readonly RequestOpenItem[]): RequestOpenItem | null;
/**
 * What an owner's answer on the gate card means for the promise.
 *
 * @param d - The gate decision
 * @returns `open` (yes), `skipped` (drop it, tell the agent), `declined` (no / withdrawn), `wait` (still pending, or "reply in words")
 */
export declare function gateVerdict(d: Pick<OwnerDecision, 'status' | 'chosenKey' | 'yesKey' | 'options'>): GateVerdict;
/**
 * A waiting promise nobody can open: its sibling question was dropped (skipped,
 * withdrawn, expired), or it has neither a sibling nor a gate card. A sibling
 * that was ANSWERED is not dead: the sweep opens or drops the promise by that
 * answer. (Auto-accept by silence closes dead ones instead of parking the
 * ticket in `awaiting_followup`.)
 *
 * @param item - Item
 * @param items - All items of the request
 * @returns True when no answer can ever reach it
 */
export declare function isDeadGate(item: RequestOpenItem, items: readonly RequestOpenItem[]): boolean;
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