/**
 * Shared installed/activated/draining event-dispatch helper (WFT-12), used
 * by BOTH producers of catalog activation: `catalog-readiness.ts`'s
 * `drainPendingCatalogInstalls` (the `engine.register()`-drain path) and
 * `catalog-activation.ts`'s `activateCatalogRevisionCandidate` (the guarded
 * primitive). The two producers return different result shapes
 * (`activateRegistered` always succeeds and returns a bare pointer;
 * `activateCandidate` returns a union that can also refuse) — this helper
 * takes already-normalized before/after pointer values instead of either
 * raw return type, so it stays agnostic to which producer called it.
 * `activation-rejected` is NOT dispatched here — only `activateCandidate`
 * can refuse, so its one caller dispatches that event itself.
 *
 * @module core/engine/catalog-events
 */
import type { WorkflowCatalogActivePointer } from '../catalog/index.ts';
import type { Engine } from './index.ts';
/**
 * Dispatch `catalog:revision-installed` (only when `preExisting` is
 * `false` — genuinely new content, not a byte-identical reinstall or a
 * cross-process durable adoption of already-present content), then decide
 * activated/draining from how `pointerBefore` and `pointerAfter` compare:
 *
 * - Identical `revision` AND `generation` (a true no-op — nothing was
 *   durably written, e.g. `activateRegistered`'s own no-op branch): neither
 *   fires.
 * - Same `revision`, different `generation` (a reactivation that still
 *   bumped the fencing counter, e.g. `activateCandidate` re-activating the
 *   currently active revision): `catalog:revision-activated` fires with
 *   `previousRevision: undefined` — nothing was actually displaced, so
 *   there is nothing to drain.
 * - Different `revision`: `catalog:revision-draining` for `pointerBefore`
 *   (when it existed) followed by `catalog:revision-activated` for
 *   `pointerAfter`, `previousRevision` set to the displaced revision.
 */
export declare function dispatchCatalogInstallAndActivatedEvents(engine: Engine, name: string, revision: string, preExisting: boolean, pointerBefore: WorkflowCatalogActivePointer | null, pointerAfter: WorkflowCatalogActivePointer): void;