/**
 * The project activity feed (DES-PROJECT-001 §5.2) — a READ-SIDE MERGE, not a new store.
 *
 * Two sources, one normalized shape:
 * - CREW: the durable core-event log of the project's `crew.run`/`crew.chat` members
 *   (`adapter.runEvents` — the same log `/runs/:id/events` serves), entry id `crew:<run>:<seq>`.
 * - INTERACTIVE: `wicked.interactive.*` bus events carrying this `project_id`, read through the
 *   engine that holds the bus (`Core.busRead`, core/bus.ts — wicked-core#631), entry id
 *   `bus:<event_id>`. Crew opens no SQLite of its own: a second SQLite library on the engine's bus
 *   file in the same process drops the engine's POSIX locks on its close (F-E2E-021), which is
 *   why this read used to need a long-lived handle and now needs none. The newest 1000 live
 *   interactive rows for the project are read, expired ones included: the feed is history.
 *
 * Newest-first, cursor on `(ts, id)` — an opaque `<ts>:<id>` token, base64url. The merge is
 * recomputed per read; members are few and the log excludes high-volume frames, so the simple
 * full-merge is the honest v1 (the ADR explicitly rejects a new store here).
 */
import type { CoreAdapter } from '../core/adapter.js';
import type { ActivityEntry } from '../core/types.js';
/** Opaque cursor: base64url of `<ts>:<id>`. */
export declare function encodeCursor(ts: number, id: string): string;
export declare function decodeCursor(cursor: string): {
    ts: number;
    id: string;
} | null;
/** Build one page of the merged feed. `refs` = the project's run/chat member refs. */
export declare function buildActivityPage(adapter: CoreAdapter, projectId: string, refs: string[], busDbPath: string | null, cursor: string | undefined, limit: number): Promise<{
    entries: ActivityEntry[];
    nextCursor: string | null;
}>;
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