/**
 * Skill element class implementing IElement interface.
 * Represents a discrete capability for specific tasks.
 *
 * SECURITY FIXES IMPLEMENTED (PR #319):
 * 1. CRITICAL: Added comprehensive input validation for all skill parameters
 * 2. MEDIUM: Implemented Unicode normalization to prevent homograph attacks
 * 3. MEDIUM: Added audit logging for security events via SecurityMonitor
 * 4. MEDIUM: Implemented memory management to prevent unbounded growth
 * 5. MEDIUM: Added XSS protection through input sanitization
 */
import { BaseElement } from '../BaseElement.js';
import { IElement, IElementMetadata, ElementValidationResult } from '../../types/elements/index.js';
import { ElementType } from '../../portfolio/types.js';
import { MetadataService } from '../../services/MetadataService.js';
export interface SkillMetadata extends IElementMetadata {
    type?: ElementType.SKILL;
    languages?: string[];
    complexity?: 'beginner' | 'intermediate' | 'advanced' | 'expert';
    domains?: string[];
    prerequisites?: string[];
    parameters?: SkillParameter[];
    examples?: SkillExample[];
    certification?: string;
    proficiency_level?: number;
    triggers?: string[];
}
export interface SkillParameter {
    name: string;
    type: 'string' | 'number' | 'boolean' | 'enum';
    description: string;
    required?: boolean;
    default?: any;
    options?: string[];
    min?: number;
    max?: number;
}
export interface SkillExample {
    title: string;
    description: string;
    input?: any;
    output?: any;
    code?: string;
}
export declare class Skill extends BaseElement implements IElement {
    metadata: SkillMetadata;
    parameters: Map<string, any>;
    private readonly MAX_PARAMETER_COUNT;
    private readonly MAX_PARAMETER_SIZE;
    private readonly metadataService;
    constructor(metadata: Partial<SkillMetadata>, instructions: string | undefined, metadataService: MetadataService, content?: string);
    /**
     * Initialize parameters with default values
     */
    private initializeParameters;
    /**
     * Set a parameter value
     * SECURITY FIX #1: Comprehensive input validation for all skill parameters
     * Previously: Parameters were set without validation, creating security risks
     * Now: Full validation pipeline including sanitization, type checking, and size limits
     */
    setParameter(name: string, value: any): void;
    /**
     * Get a parameter value
     */
    getParameter(name: string): any;
    /**
     * Get all parameters as object
     */
    getAllParameters(): Record<string, any>;
    /**
     * Validate parameter value against its definition
     */
    private validateParameterValue;
    /**
     * Execute the skill with current parameters
     */
    execute(input?: any): Promise<any>;
    /**
     * Skill-specific validation
     */
    validate(): ElementValidationResult;
    /**
     * Serialize to JSON format for internal use and testing
     */
    serializeToJSON(): string;
    /**
     * Get content for serialization
     */
    protected getContent(): string;
    /**
     * Serialize skill to markdown format with YAML frontmatter
     * FIX: Changed from JSON to markdown for GitHub portfolio compatibility
     */
    serialize(): string;
    /**
     * Deserialize skill from JSON format
     */
    deserialize(data: string): void;
    /**
     * Skill activation lifecycle
     */
    activate(): Promise<void>;
    /**
     * Clone the skill with different parameters
     */
    clone(newParameters?: Record<string, any>): Skill;
    /**
     * Skill deactivation lifecycle
     * SECURITY FIX #4: Automatically clears parameters on deactivation
     * to prevent memory leaks in long-running processes
     */
    deactivate(): Promise<void>;
    /**
     * Clear all parameters (for memory management)
     * SECURITY FIX #4: Added method to clear parameters and prevent memory leaks
     * Previously: Parameters accumulated indefinitely in long-running processes
     * Now: Provides explicit cleanup mechanism called during deactivation
     */
    clearParameters(): void;
}
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