/**
 * WHY an install has produced no session — the closed vocabulary, on its own.
 *
 * `telemetry.ts` is the wire contract; this is the taxonomy the no-session DIAGNOSIS owns, read by
 * `explainNoSession`, the session manager and the refusal reporter alike.
 *
 * `no_session` is the largest refusal cohort, and on its own it is a set difference: the daemon
 * started, no app connected, and nothing says which of several opposite situations that was.
 * "Restarted the dev server and it still did not connect" and "never started the app" need
 * opposite fixes and arrived as the same silence (#615).
 *
 * Derived from `explainNoSession`'s branches rather than classified beside them, so the code and
 * the sentence the user is shown cannot drift apart. A reason describing a diagnosis nobody
 * received would be worse than none.
 */
export declare const NoSessionReason: {
    /**
     * A page dialled and was REFUSED on its pairing token. The only positive evidence in the set:
     * only an SDK dials the bridge, so the app is running and instrumented and this daemon said no.
     */
    readonly AUTH_REFUSED: "auth_refused";
    /** Connected before; the session that went was a pooled lease that aged out. */
    readonly LEASE_EXPIRED: "lease_expired";
    /** Connected before; the tab was closed, navigated away, or hard-reloaded. */
    readonly TAB_GONE: "tab_gone";
    /**
     * Connected before, and the SDK reported the page navigating away just before the socket
     * closed (#1256). A load-time `location.assign` to an uninstrumented page used to read as
     * TAB_GONE — the daemon only saw the socket close. This is the departure note outranking the
     * hedge: the tab was not closed, it left for somewhere named.
     */
    readonly NAVIGATED_AWAY: "navigated_away";
    /**
     * Connected before, and the route the tab was on answers 5xx right now. A server error tears the
     * page down and the SDK never reconnects, so it used to read as TAB_GONE — the URL was known, and
     * nothing asked it what it answers. This is the answer, and it outranks TAB_GONE because it is not
     * an absence. Present tense only: a 5xx now is what was observed, not a claim about then.
     */
    readonly ROUTE_SERVER_ERROR: "route_server_error";
    /** This project has connected before, but not to this daemon run. Usually a restart with no reopen. */
    readonly APP_NOT_REOPENED: "app_not_reopened";
    /** A `.reticle.json` exists OUTSIDE this daemon's directory: a scope problem, not an install one. */
    readonly CONFIG_ELSEWHERE: "config_elsewhere";
    /** Nothing listening on the scanned ports AND no config here. The weakest position, and common. */
    readonly NO_LISTENER_NO_CONFIG: "no_listener_no_config";
    /** Nothing listening, but the project is wired. The dev server is the missing half. */
    readonly NO_LISTENER: "no_listener";
    /** Something is listening, but there is no config in this directory. */
    readonly NO_CONFIG: "no_config";
    /** Wired, listening, and still nothing arrived: the SDK is not reaching this daemon. */
    readonly SDK_NOT_REACHING_DAEMON: "sdk_not_reaching_daemon";
};
export type NoSessionReason = (typeof NoSessionReason)[keyof typeof NoSessionReason];