For engineers, Harness Engineering is becoming an essential way of working.

Every codebase will end up with some form of harness. It brings consistency, quality, and tighter learning loops. It also helps create deterministic code components that support the development process inside the codebase itself.

It can take some effort to dial in at the start, but the investment compounds over time. More importantly, it prepares your codebase to work effectively with agents.

Another part that doesn’t get talked about enough is onboarding. You can build a harness bootstrap and guided onboarding process directly into the engineering workflow. New engineers can get productive in hours instead of weeks or months, even in complex codebases.

I even go as far as bootstrapping the build and environment setup process for every application. That includes dependency validation, pre-flight checks, and automated setup paths so builds come out clean and consistent every time.

It’s a relatively small investment that pays back continuously through speed, reliability, onboarding, and agent readiness.