export interface SpawnResult {
    stdout: string;
    stderr: string;
    exitCode: number;
}
export interface RuntimeCommands {
    /** Runtime binary: "node" */
    runner: string;
    /** Package executor: "npx" */
    exec: string;
    /** Pack command: ["npm", "pack"] */
    packCmd: string[];
}
export interface RuntimeAdapter {
    readonly name: "node";
    /** Hash content and return hex string */
    hash(content: string): string;
    /** Algorithm name recorded in integrity.json */
    readonly hashAlgorithm: string;
    /** Test whether filePath matches a glob pattern */
    globMatch(pattern: string, filePath: string): boolean;
    /** Spawn a child process and collect output */
    spawn(cmd: string[], opts?: {
        cwd?: string;
    }): Promise<SpawnResult>;
    /** Commands to use when spawning package manager / executor */
    readonly commands: RuntimeCommands;
}
/**
 * Initialize the runtime adapter singleton.
 */
export declare function initRuntime(): RuntimeAdapter;
/**
 * Get the runtime adapter. Lazily initializes if not yet set.
 */
export declare function getRuntime(): RuntimeAdapter;
/**
 * Convert `import.meta.url` to a directory path.
 */
export declare function moduleDir(importMetaUrl: string): string;
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