export type CommandResult = {
    durationMs: number;
    status: number | null;
    signal: NodeJS.Signals | null;
    error?: Error;
    diagnosticTail: string;
};
/** Quiet npm/npx progress when we spawn a nested package-manager CLI. */
export declare function mutedNpmEnv(base?: NodeJS.ProcessEnv): NodeJS.ProcessEnv;
export type RunCommandOptions = {
    env?: NodeJS.ProcessEnv;
    /** When false, capture stdout/stderr without writing them to the parent. Default true. */
    echo?: boolean;
    /** Default inherit so interactive CLIs can prompt. Use ignore for login probes. */
    stdin?: "inherit" | "ignore";
    /** Inherit stdout/stderr so the child sees a TTY (needed for `vercel login`). */
    inheritOutput?: boolean;
    /** Max bytes retained in `diagnosticTail` when output is piped. Default 16KiB. */
    captureLimit?: number;
};
/**
 * `spawn.sync(..., { stdio: "inherit" })` exposes exit status but not the output
 * needed to distinguish dependency, workspace, and package-compatibility failures.
 * This runner preserves normal terminal streaming while retaining only a bounded
 * local tail for allowlisted classification. The tail must never be sent to telemetry.
 *
 * Running asynchronously also lets the parent forward SIGINT/SIGTERM, wait for the
 * child to close, and return cancellation metadata before telemetry is flushed.
 */
export declare function runCommand(command: string, args: string[], cwd: string, options?: RunCommandOptions): Promise<CommandResult>;
export type QuietCommandOptions = {
    command: string;
    args: string[];
    cwd: string;
    label: string;
    env?: NodeJS.ProcessEnv;
    captureLimit?: number;
};
/** Run a command with output captured and a spinner in the terminal. */
export declare function runQuietCommand(opts: QuietCommandOptions): Promise<CommandResult>;
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