/**
 * Filter engine - orchestrates filter rules
 */
import type { FilterRule } from './filter-rules.js';
import type { ToolDefinition } from '../../types/profile.js';
/**
 * Filter result
 */
export declare class FilterResult {
    readonly allowed: boolean;
    readonly reason?: string | undefined;
    private constructor();
    static allowed(reason?: string): FilterResult;
    static denied(reason: string): FilterResult;
}
/**
 * Filter engine that evaluates tools against rules
 */
export declare class FilterEngine {
    private allowRules;
    private denyRules;
    constructor(allowRules: FilterRule[], denyRules: FilterRule[]);
    /**
     * Evaluate tool name against rules
     *
     * Rule precedence:
     * 1. Deny rules (if any match, deny immediately)
     * 2. If no allow rules, allow by default
     * 3. Allow rules (must match at least one)
     */
    evaluate(toolName: string): FilterResult;
    /**
     * Evaluate tool definition against rules
     *
     * Used when rules need full tool definition (e.g., CategoryMatchRule).
     * Tool name is normalized (NFC) before passing to name-based rules.
     *
     * Rule precedence:
     * 1. Deny rules (if any match, deny immediately)
     * 2. If no allow rules, allow by default
     * 3. Allow rules (must match at least one)
     */
    evaluateTool(tool: ToolDefinition): FilterResult;
}
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