type Outcome = {
    readonly status: "present";
} | {
    readonly status: "installed";
} | {
    readonly status: "updated";
} | {
    readonly status: "no-npm";
} | {
    readonly status: "failed";
    readonly permission: boolean;
    readonly hadExisting: boolean;
};
/**
 * Make sure a current, PERSISTENT `glen` binary is reachable on PATH,
 * installing or updating it globally via npm when it isn't. `npx
 * @tryglen/cli install` runs this CLI from npx's transient cache without ever
 * linking a global binary — without this step the plugins' hooks would have
 * no `glen` to call and silently do nothing. We deliberately ignore npx's own
 * ephemeral shim (see persistentGlenPath) so a fresh machine always gets a
 * real global install.
 *
 * `onInstallStart(hadExisting)` fires just before the (slow) npm install so
 * the caller can print a progress line first.
 */
declare const ensureGlobalCli: (onInstallStart?: (hadExisting: boolean) => void) => Outcome;
export { ensureGlobalCli };