GemmaDiff: A Local AI Code Reviewer That Keeps Your Code Off the Cloud

Developer dragon_ha introduced GemmaDiff — a code review tool powered by Gemma 4 that runs entirely locally. No "send us your code, we'll take a look" — everything stays on your machine. For those not yet comfortable with every commit potentially wandering off into the cloud, it's a breath of fresh air in a smoke-filled data center.

How it works: GemmaDiff analyzes code diffs and provides feedback without ever leaving your laptop. No API keys, no third-party services — just you, your IDE, and a model that doesn't blab. Perfect for projects under NDA or for paranoid folks who don't trust even cloud providers.

Sure, a local AI won't replace a senior developer, but for quick checks on silly mistakes or style issues, it's just the thing. Especially when your CI/CD pipeline is already overloaded and code reviewers are perpetually stuck in a 47-column JIRA.

METABYTE studio comment: We're all for privacy, so local solutions are great. But if you want your code reviewed not only by AI but also by humans who don't fall asleep during code review — we're here. And yes, we don't send your code to the cloud without asking either.