Simple explanation

Think about the difference between asking a random person on the street for medical advice — versus asking a doctor. Same question. Very different quality of answer. The doctor is not smarter than the random person in general. They are just deeply focused on one specific area. That is what an Agent does for Claude Code. --- What is an Agent? An Agent is Claude Code with a specific job title, a specific set of skills, and a specific way of working — all written down in a file. When you activate an Agent — Claude Code stops being a general assistant and becomes a specialist. You are not installing new software. You are not changing anything technical. You are just giving Claude Code a clear role — like handing someone a job description before they start work. --- The difference in plain English. Without an Agent: "Review my homepage and tell me if it looks good." Claude Code gives you a general opinion covering everything loosely. With a UI Design Agent: "Review my homepage and tell me if it looks good." Claude Code reviews it specifically as a UI designer — checking font consistency, colour contrast, spacing rules, button placement, mobile layout, and hierarchy — and gives you a prioritised list of specific fixes. Same question. Completely different quality of answer. --- The 5 most useful Agents for non-developers: The Reviewer Agent Job title: Design and content quality reviewer What it does: Reviews any page for design consistency, spelling, tone, and missing elements. Run this before showing anything to real users. The Builder Agent Job title: Careful step-by-step developer What it does: Builds one thing at a time, explains every change, never touches files it was not asked to touch. The safest way to build new features. The Debugger Agent Job title: Error detective What it does: Takes any error message and finds the root cause — not just the surface fix. Stops the same error from happening again. The Writer Agent Job title: Plain English content writer What it does: Writes or rewrites any text on your site in your brand voice — warm, clear, no jargon, speaking directly to non-technical founders. The SEO Agent Job title: Search engine specialist What it does: Reviews any page specifically for SEO — title tags, meta descriptions, heading structure, keyword usage, and internal links. --- The key difference between Agents and Skills. Skills — do a specific task. A skill is a task. Agents — take on a role. An agent is a mindset. Use Skills for repeatable tasks. Use Agents for specialist thinking.

What to do

Create the Reviewer Agent using the copy-paste prompt on this page. Activate it on your homepage by typing: "Activate the reviewer Agent and review my homepage." Read through the prioritised list it gives you. Pick the top three fixes. Fix them one at a time using the WHAT + WHERE + HOW + VERIFY formula. Run the Reviewer Agent again and see if the issues are gone.

Copy-paste prompt

Create an Agent called reviewer. This Agent is a professional UI and content reviewer. When activated it should review the page I specify and check for: design consistency, spelling mistakes, tone consistency, missing calls to action, and mobile layout problems. It should give me a prioritised list of fixes — most important first. Save this Agent to .claude/agents/reviewer.md

Course note

Agents are different from Skills. A Skill does a specific repeatable task. An Agent takes on a role and applies specialist thinking to everything you ask it. You can have as many Agents as you need — one for each specialist role in your project.

Key takeaway

An Agent gives Claude Code a specific job title and a specialist mindset. The Reviewer Agent checks your site through professional eyes. Create it once and activate it any time you want an expert second opinion — before you show anything to real users.