/**
 * Idempotent materialization of a task source's script files. Copies each
 * `files[]` entry from the manifest's directory into `installDir` when the destination is
 * missing or its bytes differ, then marks it executable. A manifest with no
 * `files` installs nothing (the source is backed by a binary already on PATH).
 * Never writes secrets - prerequisites and secrets stay the user's job.
 */
import type { SourceManifest } from "./manifest.ts";
export interface InstallShellSourceOptions {
    manifest: SourceManifest;
    manifestDir: string;
}
export interface InstalledShellSource {
    installDir: string;
    scriptPaths: string[];
}
export declare function installShellSource(options: InstallShellSourceOptions): InstalledShellSource;
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