AI Testing Skill Β· End-user Β· UAT Β· Open source
Fagun is an autonomous QA & testing Skill that gives any AI agent a real browser β to use your product like real customers (mobile, slow-internet, keyboard-onlyβ¦), walk whole journeys, hunt real bugs, and return a product-readiness verdict.
Works in Claude, Cursor, Codex & more. fagun deep test URL automatically uses Chrome DevTools MCP when available, reuses signed-in Chrome after you click Allow, and still prints the full Fagun result.
Install in one line
Choose one setup path: uvx fagun init if you want no Python setup, or pip install --upgrade fagun && fagun init if you already use pip. Seeing old output? Force refresh with uvx --upgrade --reinstall fagun init.
Latest local report
When this docs site is served locally, the generated full-site report is available as a normal website page. This avoids browser restrictions around opening file:// links from an HTTP page.
Full workflow
Users only need to install once, restart the AI tool, then type fagun deep test URL. Fagun opens the target in a real browser, maps the business flow, checks auth, clicks/fills real fields with labelled test data, watches console/network, and saves an action-by-action report.
uvx fagun init
Browser engine, 24 testing skills, Fagun MCP & Chrome DevTools MCP configs.Claude, Codex, Cursor, Windsurf
Fagun loads as an AI skill backed by real browser tools, giving every model senior QA abilities.Open target, map product, check auth
Chrome MCP reuses signed-in Chrome; if logged out, Fagun asks for manual login or authorized test credentials.Does the app pass?
Every visit, click, fill, assertion, screenshot, failed request, and console error is recorded.Ready verdict
Evidence archived, report saved, retest command included.Action replay, findings, repro steps, screenshots, failed requests, console errors, fixes.
HTML Β· Markdown Β· JSON Β· JUnit Β· CI friendly.What it does
Deep test covers the full readiness surface: product/business understanding, auth state, journeys, links, console, network/API, forms, validation, accessibility, performance, SEO, visual layout, responsive breakpoints, keyboard use, security headers, CORS/CSP, exposed files/secrets, XSS/redirect signals, action replay reports, and safe external security-tool planning.
Works everywhere
Built in
Every skill loads automatically when the conversation calls for it, and composes with the Fagun browser engine — the skill reasons about what to check, Fagun gathers the evidence.
See it in action
One command sets up every AI tool on your machine. Then just type fagun deep test URL; no separate Chrome-connect command is needed.