/**
 * Rule Host Helpers — Minimal whitelisted helper surface for hosted implementations
 *
 * PURPOSE: Provide a constrained set of pure functions that hosted implementations
 * can call. All values are pre-computed from the frozen RuleHostInput snapshot.
 *
 * SECURITY:
 *   - Helpers are a frozen object — cannot be modified by implementations
 *   - No filesystem, process, require, dynamic import, eval, Function, or network access
 *   - All functions are pure — no side effects, no external state access
 */
import type { RuleHostInput } from './rule-host-contracts.js';
export interface RuleHostHelpers {
    isRiskPath(): boolean;
    getToolName(): string;
    getEstimatedLineChanges(): number;
    getBashRisk(): 'safe' | 'normal' | 'dangerous' | 'unknown';
    getEpTier(): number;
}
/**
 * Create a frozen helper object from the pre-computed input snapshot.
 * Implementations receive this via the vm context — they cannot modify it.
 *
 * PRI-286 retirement cleanup (2026-08-19): the plan-state helper entries were
 * removed — the built-in PLAN.md gate is retired and no production rule reads
 * plan state. Do not reintroduce plan-state helpers without owner approval.
 */
export declare function createRuleHostHelpers(input: RuleHostInput): RuleHostHelpers;
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