The ComposioHQ awesome-claude-skills repository curates over 1,000 production‑ready Claude Skills and Plugins that enable AI agents such as Claude.ai, Claude Code, OpenAI Codex, Cursor, Gemini CLI, Antigravity and Windsurf to perform concrete actions beyond text generation. Each skill is a folder containing a SKILL.md file with YAML front‑matter (name, description) and Markdown instructions, optionally accompanied by scripts, references and asset files. Skills are loaded progressively: at session start the agent sees only each skill’s name and description, consuming roughly 100 tokens per skill, while the full SKILL.md body (typically under 5,000 tokens) and auxiliary files are fetched on demand when the skill is deemed relevant, allowing hundreds of skills to coexist without inflating the context window. The Composio MCP Gateway supplies a single MCP endpoint for more than 1,000 integrations, providing built‑in authentication, team‑based access controls, audit logs and production reliability; the connect‑apps plugin uses this gateway to let Claude send emails, create issues, post to Slack and interact with 1,000+ services. In practice, MCP handles external access, tools expose individual functions, and skills define the workflow—what to do, in what order, with which guardrails—so that all three layers operate together in production.