/** Default steer dir relative to a repo root: `<root>/.pi/steer`. */
export declare const DEFAULT_STEER_DIR = ".pi/steer";
/** Structured payload written to a `<runId>.steer` file. */
export interface SteerFilePayload {
    runId: string;
    message: string;
    timestamp: number;
}
/** Resolve the absolute steer file path for a run id. */
export declare function steerFilePath(runId: string, dir: string): string;
/**
 * Atomically write a steering message for `runId` into `dir`. Creates the dir
 * if missing. Returns the absolute steer file path.
 */
export declare function steer(runId: string, message: string, dir: string): string;