/**
 * Late-stage plugin-state finalization shared by `buildSessionRuntime`,
 * `loadHarness`, and the CLI `list` path. Centralizes the
 * `dropUnusedObservers` + breadcrumb pass so all three stay byte-equal
 * in their breadcrumb output and observer-drop semantics.
 *
 * Drops observers whose declared `writes` are unconsumed across both
 * plugin-merged and user-authored streams, using the union of all
 * rule `happened` references. Emits an `info`-level breadcrumb per
 * dropped observer so plugin authors debugging "why isn't my
 * observer firing?" have a trail to follow without it bubbling up as
 * a diagnostic the user has to action.
 *
 * Callers must pre-filter `config.disabledRules` out of `userRules`
 * — see {@link dropUnusedObservers}'s contract.
 */
import type { Observer, Rule } from "../schema.ts";
export declare function finalizePluginState(userRules: readonly Rule[], pluginRules: readonly Rule[], userObservers: readonly Observer[], pluginObservers: readonly Observer[]): {
    pluginKept: readonly Observer[];
    userKept: readonly Observer[];
};
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