Fagun
Docs GitHub

End-user Β· UAT Β· QA agent Β· Open source

Real-user testing agents.

Fagun gives any AI a real browser β€” to use your product like real customers (mobile, slow-internet, keyboard-only…), walk whole journeys, hunt real bugs, and return a product-readiness verdict.

Works in Claude, Cursor, Codex & more. Chrome installs itself. Token-lean by default.

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Install in one line

Nothing to configure.

No Python, no pip β€” uv brings its own. Chrome auto-installs on first run.

$ uvx fagun install claude-code
// or, inside Claude Code:
/plugin marketplace add mejbaurbahar/fagun
/plugin install fagun@fagun

What it does

Use it like a customer. Prove it's ready. Find every crack.

11 end-user personas
Full user journeys
Readiness verdict
Authenticated testing
Broken links
Console / JS errors
Failed requests
Form & validation flaws
Accessibility
Performance
Exposed files & secrets
CORS / headers
Reflected XSS & redirect
Self-healing helpers

Works everywhere

Claude Code Claude Desktop Cursor Codex Antigravity Windsurf Cline VS Code

See it in action

Setup to first bug, on any OS.

Terminal β€” macOS

One command sets up every AI tool on your machine. Then just type fagun + what to test.