Sentinel – open-source QA agent that reads your code before it clicks
Sentinel is an open-source AI QA agent that reads your repo, derives the real business flows, and tests them end to end across the frontend and the backend.
Sentinel – open-source QA agent that reads your code before it clicks launched on July 16, 2026 with 16 votes, #1,041 of 24,623 launches that month and more than 90% of that year's launches.
In plain words
Sentinel is an open-source QA agent that analyzes code before performing automated testing clicks. It's designed for development teams who want to improve testing efficiency by having AI understand application structure before execution. The tool combines code reading capabilities with automated interaction, allowing testers to identify issues earlier in the development process.
written from the facts on this page · September 2026
From the sources
Sentinel reads the codebase, works out the real business flows, and tests them end to end across the frontend and the backend. It's open source under MIT. 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. That's useful the way a smoke test is useful. The agent has no model of what your product actually does. A QA engineer worth hiring doesn't click around. They learn the product first, then reason about it: this is a hotel system, so I need to test a single booking, a group booking, a cancellation that frees the room back up, check-in, check-out, and the night audit, and I need to confirm…from blog.simbastack.com
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