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-verifywith different modes (default, full, visual, functional) - Includes
/ironbee-analyzefor 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 installSource 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
📖 Read the full source: r/ClaudeAI
👀 See Also
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