At Cosine, we’ve always believed that AI should meet you where you work – not the other way around. With the launch of Cosine CLI, we’re doing exactly that. Now, our agentic AI software engineer is available directly in your terminal, ready to code alongside you in real time.

With Cosine in the terminal, developers stay in their native workflow. Only a command away, our agent is ready to write, refactor, test, and even execute shell commands. It’s pair programming without the friction.

The power of Cosine in your terminal

Cosine CLI brings the full Cosine experience to your local machine. That means an AI that can take on entire tasks, from building new features and fixing bugs to generating test cases and documentation. Cosine reasons, plans, and iterates like a real teammate. It understands your codebase, writes real code, and adapts based on your feedback.

Unlike tools that only suggest completions, Cosine works autonomously or interactively. Ask it to “add pagination to this API,” and watch as it reads the code, makes changes, and tests the results – all while respecting your tooling, branching strategy, and local conventions.

Cross-environment integration

Start a task in the browser, and now need to continue it in your terminal? Our seamless cross-environment support ensures you can pick up exactly where you left off, right from your terminal.

It’s designed for developers who flow between environments and expect continuity, speed, and zero friction.

Because Cosine CLI runs in your environment, our agent can access your local files, run builds, execute tests, and interact with project-specific tools.

This is especially critical for teams with sophisticated toolchains or projects that can’t easily run in the cloud. Cosine adapts to your setup, rather than the other way around.

Designed for real teams at scale

Cosine is trained specifically for engineering workflows – not general chat – we consistently outperform more generic LLMs on real-world coding tasks.

With Cosine CLI, every engineer gets a tireless AI pair programmer. That means fewer bottlenecks, faster delivery, and more time spent on what matters. Junior developers can rely on Cosine for guidance and examples. Seniors can offload repetitive tasks and focus on architecture. Everyone benefits from having an always-available partner who understands code and context.

Teammates can even handoff and continue tasks already in progress, ensuring a seamless async workflow.

Cosine CLI closes the gap between developers and AI, turning our agent into a first-class teammate embedded in your workflows. Whether you’re pushing your first commit or deploying at scale, Cosine is there to help.

Try Cosine CLI and discover what it feels like to build with an AI that truly understands your codebase, your tools, and your goals.