/**
 * Pure helpers for ordering and grouping stored sessions by suite run id.
 * Used by `sessions list`, the HTML report composition root, and the dashboard.
 */
export interface SuiteSessionGroup<T extends {
    readonly suiteRunId?: string;
    readonly suiteName?: string;
    readonly startedAt: string;
}> {
    readonly suiteRunId: string;
    readonly suiteName?: string;
    readonly sessions: readonly T[];
}
/** Build suite-run groups when at least one session carries a `suiteRunId`. */
export declare function buildSuiteSessionGroups<T extends {
    readonly suiteRunId?: string;
    readonly suiteName?: string;
    readonly startedAt: string;
}>(sessions: readonly T[]): readonly SuiteSessionGroup<T>[] | undefined;
/**
 * Order sessions so suite members are contiguous, with each suite block sorted
 * by `startedAt` desc and blocks ordered by their latest step.
 */
export declare function orderSessionsForSuiteGrouping<T extends {
    readonly suiteRunId?: string;
    readonly startedAt: string;
}>(sessions: readonly T[]): T[];
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