/**
 * Node-only readline prompt for the default approval handler. Lives
 * in its own file so the browser bundle can swap it for a stub via
 * package.json's `"browser"` field (mirroring the existing
 * `transport.browser.ts` / `manager.browser.ts` pattern). Keeping
 * the `readline` import in this file means the rest of
 * `approval.ts` — types, normalization, annotation merging,
 * `resolveApproval` — stays bundler-safe.
 *
 * The Node version reads `process.stdin` when `isTTY` is true and
 * deterministic-denies otherwise. The browser stub
 * (`_readlineApprovalPrompt.browser.ts`) always deterministic-denies
 * with a message explaining that the consumer must register an
 * explicit `ApprovalHandler`.
 */
import type { ApprovalDecision } from './approval.js';
/**
 * Prompt for a yes/no approval on stdin. Returns the resolved
 * {@link ApprovalDecision}. In non-TTY contexts (daemon, web worker,
 * CI), returns `{ decision: 'deny' }` with a typed reason explaining
 * how to register a custom handler.
 *
 * Concurrent invocations queue on a module-level mutex so multiple
 * `requireApproval`-gated tools in one `tool.request` batch don't
 * interleave on the shared stdin (see comment on `promptQueue`).
 *
 * The Node `readline` import is statically resolvable in this file —
 * which is intentional: bundlers walking `approval.ts` see the
 * import path (via the per-file alias in `package.json#browser`) and
 * substitute the browser stub instead.
 */
export declare function readlineApprovalPrompt(toolName: string, prompt: string): Promise<ApprovalDecision>;
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