Skill UI

This skill covers configuring host-based and cloud firewalls using iptables, nftables, and UFW. It includes implementing network segmentation, traffic filtering, and security zone policies. Suitable for securing server perimeters, migrating firewall technologies, and responding to security incidents. Requires Linux root access and network knowledge.

This skill provides production-ready shell script templates for common Linux system administration tasks such as backups, monitoring, user management, and log analysis. It serves as a foundation for security operations and penetration testing environments, requiring basic bash knowledge and appropriate system permissions.

Advanced TypeScript and JavaScript expert with deep knowledge of type-level programming, performance optimization, monorepo management, migration strategies, and modern tooling. Provides practical solutions for complex type errors, build performance, and type-safe design patterns.

This expert guide provides comprehensive best practices for developing robust, high-performance C++ code within Unreal Engine 5.x. It covers critical topics such as UObject lifecycle management, adhering to Epic Games' strict coding conventions, optimizing performance-critical sections (e.g., avoiding unnecessary Ticking), and correctly using soft references for asset loading. Use this skill for professional game development tasks requiring deep knowledge of the Unreal reflection system and advanced C++ patterns.

Use YYLO Ledger wiki records to manage durable project knowledge. Search, create, and update records safely without direct storage edits. Distinguish between wiki, tasks, and artifacts. Ensure revision safety and data integrity using CLI commands for version control.

Designs and builds a minimal knowledge base setup for businesses, including article index, ownership, tagging, and review cycles. Produces CSV, SQL, JSON, or Notion artifacts on request. Use for documentation management and internal knowledge organization.