export declare const SCOPE_RENDER: {
    readonly REQUEST_RESPONSE: "request-response";
    readonly RESPONSE_ONLY: "response-only";
    readonly REQUEST_ONLY: "request-only";
};
export type ScopeRenderMode = (typeof SCOPE_RENDER)[keyof typeof SCOPE_RENDER];
export declare const SCOPE_ALL = "all";
export declare const SCOPE_ALL_ALIAS = "*";
/**
 * A slice of the transcript, as a pair of indexes over its conversation rows. Both ends are
 * inclusive and zero-based, and a negative index counts from the end — `-1` is the last row.
 * Mirrors Core's `SessionScopeRange`.
 */
export type ScopeRange = {
    from: number;
    to: number;
};
export type ScopeMessageSelector = typeof SCOPE_ALL | typeof SCOPE_ALL_ALIAS | ScopeRange;
/**
 * A range as a pair of real positions in a list of `length` rows: negatives taken from the end,
 * everything clamped inside, and the two ends ordered — so a range written backwards, or reaching
 * past either end, still names a slice that exists.
 */
export declare const resolveRange: (range: ScopeRange, length: number) => {
    start: number;
    end: number;
};
export type WidgetScope = {
    messages?: ScopeMessageSelector;
    render?: ScopeRenderMode;
};
export declare const SCOPE_UNAVAILABLE_REASON: {
    readonly INVALID_SELECTOR: "invalid-selector";
    readonly INVALID_RENDER: "invalid-render";
    readonly EMPTY_SESSION: "empty-session";
};
export type ScopeUnavailableReason = (typeof SCOPE_UNAVAILABLE_REASON)[keyof typeof SCOPE_UNAVAILABLE_REASON];
export type ScopeResolution = {
    kind: 'all';
} | {
    kind: 'visible';
    visible: ReadonlySet<number>;
} | {
    kind: 'unavailable';
    reason: ScopeUnavailableReason;
    keepVisible: ReadonlySet<number>;
};
type ScopedMessage = {
    type?: string;
};
export declare function isScopeConfigured(scope: WidgetScope | undefined): boolean;
export declare function groupIntoExchanges(messages: readonly ScopedMessage[]): number[][];
export declare function resolveScope(messages: readonly ScopedMessage[] | undefined, scope: WidgetScope | undefined): ScopeResolution;
export declare function isIndexVisible(resolution: ScopeResolution, index: number): boolean;
export {};