import type { Invoke, JsonValue } from "./protocol.js";
import type { ServeOptions } from "./serve.js";
export interface NativeEmit {
    native(event: JsonValue): void;
    text(chunk: string): void;
}
export type NativeHandler = (invoke: Invoke, emit: NativeEmit) => Promise<string | void> | string | void;
export interface NativeServeInfo {
    framework: string;
    sdkName?: string | null;
    /** Installed SDK version for the hello handshake. When OMITTED (the
     *  template default), it is resolved at runtime from `sdkName`'s installed
     *  package.json — works for unbundled workers with a real node_modules;
     *  degrades to null inside a self-contained bundle (nothing to resolve). */
    sdkVersion?: string | null;
}
/**
 * Resolve `pkgName`'s installed version by walking up from its resolved main
 * entry (a `require.resolve(pkg + "/package.json")` throws
 * ERR_PACKAGE_PATH_NOT_EXPORTED for SDKs whose exports map omits the
 * subpath — the claude/openai SDKs both do). Never throws: null when the
 * package can't be resolved (bundled worker, absent dep).
 */
export declare function resolveInstalledVersion(pkgName: string): string | null;
export declare function serveNativeOn(handler: NativeHandler, info: NativeServeInfo, opts: ServeOptions): Promise<void>;
/** The public entry: wire stdin (fd 0) + an fd-3 Writable, then run the loop. */
export declare function serveNative(handler: NativeHandler, info: NativeServeInfo, opts?: {
    idleMs?: number;
}): Promise<void>;
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