import type { SignalName, SpawnedProcess } from "../execution/deps.js";
/** L6: signal forwarding for `hcn run` targets the harness child
 * explicitly. The runner spawns the harness child first and the approval
 * observer's helper later; remembering the last spawned process would
 * retarget SIGINT/SIGTERM at the helper the moment observation starts. The
 * first spawn wins, so the helper can never take the target. */
export declare const createHarnessSignalTarget: (signal: (proc: SpawnedProcess, sig: SignalName) => void) => {
    readonly forward: (sig: SignalName) => void;
    readonly noteSpawn: (proc: SpawnedProcess) => void;
};
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