We recently sat down with our engineers to ask them what they like about using Cosine, and there’s a pattern that came through in every conversation.

No matter which part of the product they were discussing, they all landed on the same core idea: Cosine is not built for vibe coders, hobbyists, or the broadest possible audience. It’s built for professional engineers working on real codebases.

That distinction matters. Real codebases are large, messy, high-stakes systems that have to keep running long after the demo ends.

A lot of software is designed by asking, “How do we make this accessible to as many people as possible?” That approach has produced plenty of useful tools. But it also means many products are optimized for first impressions, quick wins, and simplified workflows.

We made the opposite decision because the former approach doesn’t speak to the day-to-day reality of shipping software inside complex engineering organizations.

In this video, our engineers explain this in their own words – what they built, who they built it for, and why they believe the future of developer tools shouldn’t be defined by mass appeal, but by usefulness for the people doing the hardest work.

The agent built for production systems

Cosine is built for people who spend their days inside production systems. Engineers who have to understand unfamiliar code, trace dependencies across services, work within existing patterns, and make changes that won’t create problems three months later. The job is rarely glamorous. It requires judgment, context, and taste. We believe the tools should respect that.

That’s why our engineers talk about Cosine the way they do. They don’t describe it as magic. They don’t frame it as a shortcut around engineering. They talk about it as something built for the actual practice of engineering: navigating complexity, keeping standards high, and moving with confidence inside code that matters.

That focus is deliberate, and yes, it’s exclusionary.

Not every product has to be for everyone. In fact, trying to serve everyone often means serving nobody particularly well. We think there’s value in being clear about who a tool is for.

”A lot of people who use AI products day in and day out on existing codebases will feel a lot of the pain points. Those are the people who will get the most mileage out of a product like Cosine.” - Alistair Pullen, CEO + Co-Founder

Our opinionated point of view and approach shape the product. It shapes what we prioritize, what we ignore, and the kinds of problems we choose to solve. We care about depth over novelty. Reliability over spectacle. Real engineering workflows over generic demos.

The result is a tool designed around the needs of professionals, not the expectations of the mainstream.

If that sounds narrow, that’s because it is. Cosine wasn’t built for everyone. It was built for developers like you.

See the depth and reliability of Cosine for yourself. Try it now, or request a demo tailored to your production workflow.