import { type ElicitRequestFormParams, type InputRequiredResult } from '@modelcontextprotocol/server';
/** Capabilities source: the server's negotiated view (per-request
 * backfilled on the 2026-07-28 era, initialize-scoped on 2025-era
 * connections), so legacy-era clients — today's hosts — can also declare
 * elicitation/tasks support. */
export type CapabilityProvider = () => Record<string, unknown> | undefined;
/** Does this request's client declare the `elicitation` capability? */
export declare function clientHasElicitation(ctx: unknown, provider?: CapabilityProvider): boolean;
/** Does this request's client declare an extension by its full name? */
export declare function clientHasExtension(ctx: unknown, name: string, provider?: CapabilityProvider): boolean;
export interface ConsentGateOptions {
    /** The inputRequests key — echoed back by the client on retry. */
    key: string;
    /** Human-readable explanation shown with the elicitation. */
    message: string;
    /** Flat JSON Schema of primitives describing the expected response. */
    schema: ElicitRequestFormParams['requestedSchema'];
}
/**
 * Read the user's decision for this gate. Three outcomes:
 * - `{ gate }` — the request carried no `inputResponses` yet: ask for the
 *   decision (input_required).
 * - `{ content }` — a retried request carrying an accepted response.
 * - `{ declined: true }` — a retried request whose response was a
 *   decline/cancel (or accepted without the required fields): the caller
 *   must surface the refusal and store nothing.
 */
export declare function consentGate<T extends Record<string, unknown>>(ctx: unknown, options: ConsentGateOptions): {
    gate: InputRequiredResult;
} | {
    content: T;
} | {
    declined: true;
};
/** Message shown for the standard boolean confirmation gates. */
export declare const confirmSchema: (title: string) => ElicitRequestFormParams["requestedSchema"];
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