import type { ITtscCompilerContext } from "../../structures/ITtscCompilerContext";
import { ResidentTransformProcess } from "./residentTransformProcess";
/**
 * A started resident transform host plus the project root its keys are relative
 * to.
 */
export interface StartedResidentTransform {
    process: ResidentTransformProcess;
    projectRoot: string;
}
/**
 * Start a resident `serve` host for the configured project.
 *
 * Mirrors the plugin spawn of `transformProjectInMemory`, but launches the
 * shared host's `serve` subcommand as one long-lived process instead of a
 * per-call `transform` subprocess. The host compiles the whole project once at
 * startup and then answers per-file requests, so one caller pays the project
 * compile once and reuses it across its own per-file requests.
 *
 * Resident mode runs through the linked-plugin shared host
 * (`cmd/utility-host`), which is the only binary that exposes `serve`. It
 * therefore requires at least one transform-stage plugin; executable transform
 * hosts that own their own process are not served and must use the per-call
 * transform path. Check-stage plugins are not run by the resident host.
 */
export declare function startResidentTransform(context: ITtscCompilerContext): StartedResidentTransform;