Product Manager for the Agent Harness

About the Role

The Agent Harness is a critical component of Cursor's agents, determining how they decompose tasks, interact with the file system and terminal, handle failures and retries, and allow developers to observe and steer their behaviour. As a Product Manager for the Agent Harness, you will own this framework and ensure it meets the needs of developers.

Responsibilities

• Own the agent planning and execution framework, balancing autonomy with predictability
• Design how developers observe and steer agents, including real-time progress, guardrails, and the ability to redirect mid-task
• Build evaluation and benchmarking systems, defining what 'good' means for agent quality and building the harnesses to measure it
• Analyze agent traces at scale, identifying areas for improvement and turning patterns into concrete changes
• Define the primitives for agent extensibility, allowing developers to customize agent behaviour through rules and constraints
• Improve the default Cursor agent experience, making smart model choices based on user needs, model capabilities, and cost appetite
• Shape multi-agent coordination, ensuring subagents share context and avoid conflicts when executing in parallel

You may be a fit if

• You have experience building or evaluating AI agents, LLM applications, or ML-powered developer tools
• You're deeply technical, comfortable reading code, analyzing traces, and reasoning about system behaviour at a low level
• You have strong intuition for evaluation and measurement, knowing how to define metrics that capture quality, not just activity
• You can move between the big picture and the details, from 'what should agents be capable of in six months?' to 'why did this agent fail on this specific task?'
• You're comfortable in a research-adjacent environment where the roadmap is shaped by empirical results, not just customer requests
• You have experience with reinforcement learning, agent frameworks, or AI evaluation, either as a practitioner or working closely with researchers
• You thrive in ambiguous, fast-moving environments and enjoy making hard tradeoffs with incomplete information

Benefits

• Competitive salary
• Opportunity to work on cutting-edge AI technology
• Collaborative and dynamic work environment

How to apply

If you're interested in this role, please submit your application through our website. We look forward to hearing from you!