Markagent - UI & design feedback for AI agents. Annotate webpages, capture screenshots, leave notes, record user journeys & export agent prompts for Claude Code, Cursor, Codex, OpenCode, Antigravity.

Story
If you often vibe coding with Claude Code / Cursor / Codex, you will surely encounter this situation.

You are looking at the UI and notice something is off and start prompting:

Hey, on the dashboard page, change color of the second button in the top-right toolbar. Beside that when I click it on this the loader is not showing…

You type for a while, but then Claude Code/Cursor/Codex guesses the wrong element, fixes the wrong file, and you have to explain again, and it starts to get frustrating :)))

Markagent was created to solve this problem

Instead of describing the UI in words, you click on the elements you need to talk about, add notes, and copy/paste the generated prompt into Claude Code, Cursor, Codex, ChatGPT, v0, Bolt, Lovable… at this point, the agent has enough context to jump to the correct component, the correct file, and the right place that needs fixing.

Furthermore...

Not only coders/developers need this extension, if you are:

• QA? You can use Markagent to create steps to reproduce a bug and send them to the dev.

• Designer/Product manager? You can use Markagent to provide feedback on UI/feature and send it to the dev, or you can even fix it yourself without needing a dev, haha.

Download it here - 100% local data - no tracking so there's nothing to worry about

• https://chromewebstore.google.com/detail/markagent-uiweb-feedback/hbmbjdgdofkpddalhjoapppnkoicpdjj?utm_source=unikorn

Keywords: vibe coding, UI feedback for AI agents, web annotator for Claude Code, Cursor UI feedback, Codex prompt export, OpenCode agent prompt, Antigravity annotation, annotate webpages, capture screenshots, record user journeys, export agent prompts, AI coding agent, structured prompt, React component selector, DOM context, CSS selector, agent-ready bug report, local-first chrome extension, vibe coding chrome extension, QA bug reproduction, design QA tool, frontend AI workflow, ChatGPT v0 Bolt Lovable Ollama LM Studio.

Tags: #vibecoding #ClaudeCode #Cursor #Codex #OpenCode #Antigravity #ChromeExtension #AIagents #AItools #frontend #devtools #UIUX #productivity #QA #designtools #ChatGPT #v0 #Bolt #Lovable