Essential extensions, skills and MCP

What you'll see in this lesson

1. Five add-ons that supercharge your agent

   An agent only knows what it learned in training and what it sees in your folder; add-ons give it eyes, hands and a method.

2. Context7: up-to-date docs, not from memory

   Context7 gives the agent the current docs for the version you use, so it doesn't invent old or nonexistent functions.

3. Playwright: let the agent test in a real browser

   With Playwright the agent opens your website, clicks, fills in forms and checks whether what it coded really works.

4. GitHub MCP: issues, PRs and Actions from the chat

   GitHub's official server lets the agent read issues, open PRs or check a CI failure without you copying and pasting anything.

5. Serena: edit by symbols, like an IDE

   Serena gives the agent IDE tools: find references, rename across the whole project or edit an entire function at once.

6. Superpowers: a test-driven work method

   Superpowers is a set of skills that makes the agent ask, plan, write the test first and review before wrapping up.

7. Less is more: every add-on takes up context

   Each MCP server adds its tool descriptions to the context; with too many, the agent spends more and chooses worse.

8. Your kit by project type

   You don't need all five at once: combine two or three depending on what you're doing and add the rest when you need them.

9. Summary: must-have add-ons

   With two or three well-chosen add-ons, the agent makes fewer mistakes, checks its work and follows a method.