Sentinel: an open-source QA agent that reads your code before it clicks anything

• July 16, 2026 Sentinel reads the codebase, works out the real business flows, and tests them end to end across the frontend and the backend.
• The gap between clicking and understanding Put a typical AI agent on your app and it opens a page, clicks a few buttons, notices a misaligned element or a console error, and calls the run done.