IronBee: Open-source verification layer for Claude Code and Cursor

What IronBee does

IronBee is an open-source verification layer that installs hooks into Claude Code (and also works with Cursor) to prevent AI coding agents from shipping untested code. The tool addresses a common issue where Claude Code confidently states "I've implemented the feature" without verifying if it actually works in the browser.

Key features

• Blocks task completion until the agent tests changes in a real browser
• Tracks every file edit, browser tool call, and verification attempt
• Forces the agent to submit structured verdicts (not just "looks good")
• Makes the agent fix and re-verify on failure
• Uses the browser-devtools MCP server so Claude Code can navigate pages, click buttons, fill forms, take screenshots, and check console errors
• Includes /ironbee-verify with different modes (default, full, visual, functional)
• Includes /ironbee-analyze for session analytics showing time spent coding vs fixing, problematic files, and agent improvement over time

Performance data

According to the source, tracking sessions revealed that 82% had bugs Claude Code would have shipped without verification, with a first-pass rate of only 18%. In testing, IronBee caught and fixed every bug before it shipped.

Setup

Installation requires two commands:

npm install -g @ironbee-ai/cli
cd your-project
ironbee install

Source information

Announcement blog post: https://medium.com/@serkan_ozal/introducing-ironbee-the-verification-and-intelligence-layer-for-ai-coding-agents-dd554279efa3

GitHub repository: https://github.com/ironbee-ai/ironbee-cli