Build Your Own Harness with the Agent SDK

The text provides a comprehensive guide on building custom agent harnesses using the Agent SDK, emphasizing two skills: "create-agent-tui," which scaffolds a customizable terminal UI, and "create-headless-agent," designed for CLI tools and pipelines without a terminal UI. These tools enable users to generate TypeScript projects tailored to their needs, allowing fine-grained control over appearance, functionality, and integration with OpenRouter models. The process involves obtaining an OpenRouter API key, installing the desired skill, and generating a project that can be customized further, including adding domain-specific tools or adjusting configurations. The Agent SDK simplifies the process by managing the agentic loop, tool validation, streaming, and cost tracking, allowing users to focus on application-specific elements. Both skills rely on a two-layer architecture where the inner layer, the Agent SDK, handles core functionalities while the outer layer includes configuration and session management. The text also highlights production-ready features such as safe retry mechanisms and structured output validation, drawing from established agent architectures to ensure robustness and flexibility.

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