import { type RoutingContext } from '../im/lark/event-dispatcher.js';
import { type Locale } from '../i18n/index.js';
/** Truncated placeholder chat name from the user's message text (T0 of the
 *  two-phase naming; the async AI title replaces it seconds later). */
export declare function buildPlaceholderName(text: string | null, prefix: string, locale: Locale): string;
/**
 * Does this inbound message decline session-group birth because it is a slash
 * command? Exported so the CALLER can ask BEFORE it charges message quota.
 *
 * A command (`/help`, `/login`, `/close`, …) never reaches a CLI, so it must
 * neither spend a quota unit nor be blocked by an exhausted one — but the
 * pre-birth charge has to run before the real Feishu chat is created (a quota
 * denial must have zero external side effects), i.e. long before the router's
 * own slash parsing. Hoisting THIS predicate is what keeps both invariants.
 *
 * Single source of truth on purpose: the caller's "skip the charge" decision and
 * this function's "don't birth" decision have to be the SAME decision. A caller
 * predicate NARROWER than this one re-opens the charge-a-command bug; a WIDER
 * one silently stops births for messages this function would still birth. Both
 * sides must call this.
 *
 * Leading @mentions are stripped FIRST, with the same helper and the same
 * mention list the router later uses to build `cmdContent`. Without that step
 * this predicate and the router disagree about the exact same message: Lark
 * delivers "@Bot /help" as text "@_user_1 /help" (resolved to "@Bot /help"),
 * which does not start with "/" here — so the message was charged a quota unit
 * AND birthed a group — while the router, reading the mention-stripped text,
 * still routed it as /help and never reached a CLI. That is a pure quota loss
 * on the most natural way to type a command at a bot.
 */
export declare function declinesSessionGroupBirthAsSlashCommand(data: any): boolean;
export declare function maybeBirthSessionGroup(data: any, ctx: RoutingContext): Promise<RoutingContext | null>;
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