/**
 * Primitive node contracts — minimal stubs to support `each` testing.
 *
 * Phase 1 PR-2 registers contracts for the control-flow primitives that
 * `each` fixtures need to compose realistic bodies:
 *
 *   - `__trace`  — test-only node; emits one configurable trace event
 *   - `break`    — sets completion to `{kind: 'break'}`
 *   - `continue` — sets completion to `{kind: 'continue'}`
 *   - `return`   — sets completion to `{kind: 'return', value}`
 *   - `throw`    — sets completion to `{kind: 'throw', error}`
 *   - `__breakIfEqual` — fixture helper for conditional loop exits
 *   - `__assignIndex`  — fixture helper for mutating an indexed binding
 *
 * These are explicitly minimal and stay until Phase 2 lands full
 * contracts for `do`/`let`/`assign`. `__trace` is a permanent fixture
 * helper — it is never emitted by user code.
 */
import { type NodeContract } from './index.js';
/** Test-only: emits one trace event. Props.event must be a serialized TraceEvent. */
export declare const traceContract: NodeContract;
export declare const breakContract: NodeContract;
export declare const continueContract: NodeContract;
export declare const returnContract: NodeContract;
export declare const throwContract: NodeContract;
export declare const breakIfEqualContract: NodeContract;
export declare const assignIndexContract: NodeContract;
/**
 * Idempotently register all primitive contracts. Safe to call from multiple
 * test files; subsequent calls are no-ops. Test cleanup that clears the
 * registry must re-call this.
 */
export declare function registerPrimitives(): void;
/** Reset the registered flag — only for test cleanup that clears the registry. */
export declare function _resetPrimitivesForTest(): void;