/**
 * Browser diagnostic compatibility facade for the strict semantic circuit.
 *
 * The engine itself is environment-neutral. This module deliberately injects
 * the complete browser `hson` facade so established `_circuit_test` callers
 * continue to exercise the DOMParser-backed HTML path.
 */
import type { HsonNode } from "../core/types.js";
import type { FixtureAtom, Fmt, LoopOpts, LoopReport } from "../types/diagnostics.types.js";
/** Retained source-level compatibility for diagnostics helpers and audits. */
export declare const SPIN: Readonly<Record<Fmt, {
    emit(node: HsonNode): string;
    parse(text: string): HsonNode;
}>>;
/**
 * Runs the browser-backed circuit synchronously through the strict staged
 * engine. Omitted `stopOnFirstFail` is fail-fast (`true`); callers requesting
 * exhaustive independent diagnostics must pass `false` explicitly.
 */
export declare function _circuit_test(atom: FixtureAtom, opts?: LoopOpts): LoopReport;
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