You are in Cursor. You ask the agent to fix a visual bug — a card component that overflows its container on mobile. The agent reads the file, finds the component, changes a width class. You Cmd+Tab to the browser. Still overflowing. You switch back, give more context: “It’s the inner wrapper, not the outer one. And the issue is on viewports below 640px.” The agent tries again. You switch to the browser. Fixed on mobile, but now the desktop layout has a weird gap. Three rounds. Six tab switches. The agent read the file each time. It just never saw the page.
This is not a knock on Cursor. Cursor is excellent at code problems. The issue is that you used a file-level agent for a visual problem, and file-level agents are blind to the rendered UI.
File-Level Agents Are For Code Problems
Cursor, Claude Code, Windsurf, and Copilot work on files and terminal output. They read source code, understand dependency graphs, and edit across multiple files in a single pass. They are very good at this:
- Writing new functions, refactoring modules, and complex logic
- Multi-file changes — renaming exports, updating imports, migrating APIs
- Backend work: API routes, database queries, server logic
- Running tests, reading error output, fixing what broke
These agents have one blind spot: they cannot see the rendered result. They do not know what p-4 md:p-8 lg:p-12 looks like at your current viewport width. They do not know which of three nested divs you are staring at. They edit files and the verification step — “did it work?” — is on you. You switch to the browser, look, switch back, describe the result in text, and hope the agent infers correctly.
For backend code, this is fine. A database query does not have a visual output. For frontend work, “edit, switch tabs, eyeball it, switch back, describe what you see” is a workaround masquerading as a workflow.
Browser-Level Agents Are For Visual Problems
Frontman hooks into your framework’s build pipeline and connects to your running browser. It operates on the rendered output, not the source files. This is not a convenience — it is a fundamentally different feedback loop.
When you click an element in Frontman:
- It reads the live DOM, not the source file
- It resolves computed styles, not class name strings
- It traces the element back through the component tree to the source file and line number
- It verifies the change via hot-reload in the same action — no tab switch
Frontman does not guess which file to edit. It knows, because it can see the element you selected and trace it to its origin. The visual context is the context. You do not need to describe it in a prompt.
The Same Change, Two Ways
You want to fix a card that overflows on mobile. In Cursor:
You: "Fix the card overflow on mobile in CardGrid.tsx"
Agent: *reads file, changes max-w-full to w-full on line 23*
You: *Cmd+Tab to browser* "Still overflows. It's the inner container."
Agent: *reads file again, edits line 31, adds overflow-hidden*
You: *Cmd+Tab* "That clips the content. I need the width to shrink."
Agent: *reads file again, changes the flex basis*
You: *Cmd+Tab* "Ok. That works."In Frontman:
You: *clicks the overflowing card in the browser* "Fix this overflow on mobile"
Frontman: *reads computed width: 420px, container: 375px*
*traces to CardGrid.tsx:31, edits className*
*hot-reload fires, card fits*// src/components/CardGrid.tsx
- <div className="w-96 p-4 rounded-lg shadow">
+ <div className="w-full max-w-96 p-4 rounded-lg shadow">Three rounds vs. one. The difference is not intelligence — it is whether the agent can see what overflowed and by how much.
The Honest Comparison
| Task | Right tool | Why |
|---|---|---|
| Write a new API endpoint | Cursor, Claude Code | Pure code, no visual output |
| Fix padding on the hero section | Frontman | Visual problem, needs DOM access |
| Refactor a database query | Cursor, Claude Code | Structural code change |
| Change button colors across the app | Frontman | Visual, needs computed style awareness |
| Implement auth logic | Claude Code, Cursor | Complex multi-file code |
| Let a designer tweak the landing page | Frontman | Non-developer, visual task |
| Debug a state management bug | Cursor, Claude Code | Deep code reasoning |
| Update copy and CTAs | Frontman | Content change, visual verification |
The pattern is clear. If the definition of “correct” is “it looks right in the browser,” you need an agent that can see the browser. If the definition of “correct” is “the tests pass” or “the types check,” you need an agent that reasons about code.
What Frontman Is Not
Frontman does not write your API routes. It does not refactor your state management. It does not debug race conditions in your data fetching layer. It should not. Trying to build one agent that handles both code reasoning and visual perception is how you end up with an agent that is mediocre at both.
Frontman handles the visual layer. Spacing, typography, colors, layout, responsive behavior, copy. The changes where the acceptance criterion is how it looks, and the only way to verify is a browser. That is a large category of work — easily 30-40% of frontend time — and it requires a fundamentally different kind of context than code reasoning does. It requires eyes.
Trying to use Cursor for visual work is like debugging CSS by reading the stylesheet without opening the page. You can do it. Experienced developers do it all the time. But it is slower, less reliable, and completely inaccessible to anyone who does not already know the codebase.
Common Objections
“Cursor can run my dev server and check build output. Isn’t that enough?” Build output tells you about compilation errors and test results. It tells you nothing about what the page looks like. You still have to switch to the browser, visually verify, switch back, and describe what you see in text. Terminal access solves the compilation feedback loop. It does not solve the visual feedback loop. Those are different problems.
“Claude Code can take screenshots via browser tools.” It can, through MCP servers and browser automation. But a screenshot is a raster image — it strips the component tree, the class names, the cascade, the responsive breakpoints, the state. The agent has to reverse-engineer structure from pixels. Frontman reads the DOM directly. There is nothing to reverse-engineer. It knows which component renders which element because it is hooked into the framework, not scraping the output.
“Won’t I need both tools running at the same time?” Yes. That is the point. Use Cursor or Claude Code for backend and architecture. Use Frontman for the visual layer. You already use different tools for different tasks — your editor, your terminal, your browser dev tools, your database client. Adding a visual AI agent is the same idea. Different problems, different tools, same codebase.
“Frontman is just for trivial changes.” Spacing, typography, responsive layout, color systems, component styling — this is 30-40% of frontend development time. The fact that individual changes are small does not mean the category is unimportant. It means each change is fast to make and fast to review. That is a feature, not a limitation. And it means non-developers — designers, PMs — can handle these changes directly, freeing up engineers for the structural work that actually requires engineering judgment.
The Takeaway
Stop using file-level agents for visual problems. Stop asking your coding agent to guess what the page looks like based on class names. It is 2026. The agents are good. Give them the right context for the right problem.
Use Cursor or Claude Code when the source code is the artifact. Use Frontman when the rendered page is the artifact. Let your developers use their preferred agent for complex work. Let your designers and PMs use Frontman for the visual layer. Everyone reviews PRs through the same process.
The question is not “which AI agent is best.” The question is “which agent can see what I need it to see.”
Try Frontman — open source, free during beta. Install in one command, or read about how designers and PMs can use it alongside your team. For a detailed feature-by-feature breakdown, see Frontman vs Cursor.