/**
 * The Live Activity content-state contract, shared with tb-mobile.
 *
 * tb-mobile defines the mirror of this shape in `types/live-activity.ts` and
 * decodes it with a Swift `Codable` ActivityAttributes struct. A decode failure
 * in ActivityKit is silent — the Lock Screen surface simply stops updating,
 * with no error anywhere on the server — so a field name or type drifting apart
 * from mobile's struct breaks the feature invisibly. Treat this file as a
 * contract, not an internal type: changing it requires a coordinated tb-mobile
 * change.
 */
/**
 * Statuses the surface renders. Deliberately narrower than the server's
 * `SessionStatus`: `idle` has no Live Activity representation, because a session
 * that is no longer live gets an `end` event rather than an update carrying a
 * third status mobile has no case for.
 */
export type LiveActivityStatus = "running" | "waiting_input";
/** Longest `lastOutput` sent. Mobile truncates to the same bound. */
export declare const LAST_OUTPUT_MAX_LENGTH = 90;
export interface LiveActivityContentState {
    sessionId: string;
    serverId: string;
    projectName: string;
    status: LiveActivityStatus;
    /**
     * Epoch **milliseconds** of the session's start.
     *
     * iOS renders its own ticking elapsed timer from this, so the server must
     * never send a precomputed elapsed value and never push per-second updates.
     * Carried unchanged across a renewal — a fresh value makes the user's visible
     * timer reset to zero.
     */
    startedAt: number;
    lastOutput: string;
    serverLabel?: string;
    /**
     * User-visible session title, derived from the first user message.
     *
     * Absent until the first message is submitted (a session between spawn and
     * that point has no title yet); mobile falls back to `projectName` when unset.
     */
    sessionName?: string;
}
/**
 * Collapse a server session status onto the two the surface renders.
 *
 * Returns null for a status with no representation, which is the signal to send
 * an `end` rather than an update.
 */
export declare function toLiveActivityStatus(status: string): LiveActivityStatus | null;
/**
 * Trim terminal output to the field's bound.
 *
 * Terminal output is unbounded and the whole APNs payload must stay under 4 KB,
 * so this is what keeps a chatty session from producing a rejected push.
 * Newlines collapse to spaces because the surface renders a single line.
 */
export declare function truncateLastOutput(raw: string): string;
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