AgentEcho
AgentEcho is a visual feedback annotation tool for developers that allows placing markers on webpage elements and generating AI-optimized Markdown reports for better communication between developers and AI coding assistants.
https://github.com/Areshkew/agentecho?ref=producthunt
Product Information
Updated:Feb 9, 2026
What is AgentEcho
AgentEcho is a Chrome browser extension designed to bridge the gap between developers and AI coding tools through visual annotation and structured feedback generation. It offers both a paid version on the Chrome Web Store for $2 and a free version available for developers to build from source. The tool enables developers to provide precise, context-rich feedback about web elements by combining visual markers with detailed technical information about the targeted DOM elements.
Key Features of AgentEcho
AgentEcho is a visual feedback annotation tool for developers that allows users to place markers on webpage elements and generate AI-optimized Markdown feedback reports. It features framework detection for React and Angular components, smart element analysis for extracting CSS selectors and attributes, and a visual annotation system with persistent markers, all while maintaining style isolation through Shadow DOM.
Visual Annotation System: Enables users to place numbered markers on any webpage element with blue hover highlights and persistent positioning, making it easy to identify and track feedback points
Framework Detection: Automatically identifies React and Angular components, providing deeper insight into the technical structure of web applications
Smart Element Analysis: Generates unique CSS selectors and extracts comprehensive element information including classes, IDs, data attributes, and component names
Markdown Export: One-click export of structured feedback reports optimized for AI coding agents, including all element context and precise technical details
Use Cases of AgentEcho
Code Review Collaboration: Developers can visually mark and document interface issues or improvements needed during code reviews
Bug Reporting: QA teams can create detailed bug reports with precise technical context about affected elements and components
AI Assistant Communication: Developers can generate structured feedback that's optimized for communication with AI coding assistants and automated tools
UI/UX Feedback: Design teams can provide specific feedback on interface elements with technical context for developers
Pros
Works on any website with Shadow DOM isolation
Provides comprehensive technical element analysis
Offers both free (source build) and paid (Chrome Store) options
Cons
Cannot inject into cross-origin iframes due to browser security
Framework detection may fail on production/minified builds
Selectors may break if DOM structure changes significantly
How to Use AgentEcho
Install AgentEcho: Either purchase from Chrome Web Store for $1 or build from source by cloning the GitHub repository, running 'npm install' and 'npm run build', then loading the dist/ directory as an unpacked extension in Chrome
Activate the Extension: Click the AgentEcho icon in your browser toolbar and click 'Activate' to enable annotation on the current webpage
Hover Over Elements: Move your mouse over any webpage element to see it highlighted in blue, showing what you can annotate
Add Feedback Markers: Click on a highlighted element to place a numbered marker and open a feedback modal
Enter Feedback: Type your feedback comments in the modal that appears after placing a marker
Add Multiple Markers: Repeat the process of clicking and adding feedback for as many elements as needed
Generate Report: Click 'Copy' in the toolbar to copy all feedback as a formatted Markdown report to your clipboard
Use Keyboard Shortcuts: Optional: Use shortcuts like 'C' to copy, 'H' to toggle markers, Delete/Backspace to clear markers, and Escape to exit annotation mode
Manage Annotations: Use toolbar controls to Pause highlighting, Hide/Show markers, Copy feedback, Clear all markers, or Exit the extension
AgentEcho FAQs
AgentEcho is a visual feedback annotation tool for developers that allows users to place visual markers on webpage elements and generate AI-optimized Markdown feedback reports. It's particularly useful for code reviews, bug reporting, and communicating with AI coding assistants.
AgentEcho Video
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