Skills are custom instruction files that extend what Claude Code can do. You create a SKILL.md with a workflow you want Claude to follow, and it becomes a command you can call any time. The same skills work across Claude Code, Cursor, Gemini CLI, and Codex.
01. Skill Creator
Install this one first. It builds every other skill for you automatically. Tell it what you want a skill to do, it interviews you, researches the relevant docs, writes the SKILL.md, creates test cases, and spawns sub-agents to benchmark and improve it. You never have to write a skill from scratch.
02. Self-Healing
Claude automatically diagnoses and fixes its own errors without stopping. When it hits a problem it reads the error, finds the root cause, applies a fix, and continues. Sessions no longer die mid-task.
03. Frontend Design
Stops Claude producing generic AI-looking UI. Forces bold, production-grade design decisions on every component. If you build anything in React or Tailwind this is one of the highest impact installs available.
04. Webapp Testing
Opens your app in a real browser using Playwright and runs tests. Catches UI bugs Claude cannot see from reading code alone. Essential for any client-facing work.
05. MCP Builder
Describe any external API or service. Claude builds the full MCP server to connect it to your workflow. No more writing integration boilerplate from scratch.
06. Cost Reducer
Automatically identifies expensive operations before running them. Suggests cheaper alternatives, monitors token usage during the session, and tells you when to switch models or run /compact.