Mission 01

The new thing works. What about the old one?

MellowYAK notices what else may have broken—before your coding agent says “Done.”

Local-firstWorks beside your agentNo mandatory cloud

Get an invitation to the crewOccasional product updates. No noise.

Let’s check once more.
01

The change

Your agent changes the code. Everything looks good.

02

The hidden crack

MellowYAK follows what else may have been affected.

03

Fresh evidence

Completion waits for relevant proof.

Protect what already works

Your agent writes the code.
MellowYAK protects the behavior.

Currently under development

MellowYAK is being built as a local-first, model-neutral behavior and regression guard. It is designed to work beside your existing tools—not replace them.

Join Mission 01

Every mission begins with a problem AI left behind.

Help shape the first mission.

Join early access

Before you continue

MellowYAK is not production-ready yet.

Bugs may occur while we update the project regularly. Stay tuned for the final release. For now, you can already explore and analyze the source code, or build it yourself for macOS, Linux, or Windows.