This is a monorepo for managing a curated catalog of 'skills'—packaged markdown instructions that extend AI coding agents (Cursor, Claude Code, Copilot). It provides three main surfaces: a CLI (Ink/React TUI) for installing/updating/removing skills, an MCP server (Model Context Protocol) for agent-native access, and a Next.js marketplace for browsing. The core library implements a clean port/adapter pattern for filesystem, HTTP, shell, and environment operations, with a robust lockfile system, content-hash verification, and CDN-based registry distribution. The codebase is well-structured, well-tested, and actively maintained, demonstrating high craftsmanship in dependency injection, state management, and progressive disclosure patterns.