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When users create `agents.md` files, structure code repositories for easier navigation, or configure skills for tools like OpenClaw, they are actively participating in harness engineering. They are building a user-defined "outer harness" that customizes the agent's environment to improve its performance on specific tasks.
Instead of complex SDKs or custom code, users can extend tools like Cowork by writing simple Markdown files called "Skills." These files guide the AI's behavior, making customization accessible to a broader audience and proving highly effective with powerful models.
Instead of placing agents inside a pre-set environment, a more powerful approach for reasoning models is to start with just the agent. Then, give it the tools and skills to boot its own development stack as needed, granting it more autonomy and control over its workspace.
Getting high-quality results from AI doesn't come from a single complex command. The key is "harness engineering"—designing structured interaction patterns between specialized agents, such as creating a workflow where an engineer agent hands off work to a separate QA agent for verification.
Instead of codebases becoming harder to manage over time, use an AI agent to create a "compounding engineering" system. Codify learnings from each feature build—successful plans, bug fixes, tests—back into the agent's prompts and tools, making future development faster and easier.
An AI coding agent's performance is driven more by its "harness"—the system for prompting, tool access, and context management—than the underlying foundation model. This orchestration layer is where products create their unique value and where the most critical engineering work lies.
Early agent development used simple frameworks ("scaffolds") to structure model interactions. As LLMs grew more capable, the industry moved to "harnesses"—more opinionated, "batteries-included" systems that provide default tools (like planning and file systems) and handle complex tasks like context compaction automatically.
The 'agents.md' file is an open format that functions like a README, but specifically for AI agents. It provides a dedicated, predictable place to store context and instructions, ensuring the AI consistently follows rules for commits, tests, and project setup across all your repositories.
Unlike static tools, agents like Clawdbot can autonomously write and integrate new code. When faced with a new challenge, such as needing a voice interface or GUI control, it can build the required functionality itself, compounding its abilities over time.
For advanced debugging, use a dedicated coding agent to manage your other agents. Claire Vo points Clawed Code at her OpenClaw directory to diagnose issues, fix configurations, or even "transplant" memories and tasks between her different agents, acting as a high-level administrator.
Historically, developer tools adapted to a company's codebase. The productivity gains from AI agents are so significant that the dynamic has flipped: for the first time, companies are proactively changing their code, logging, and tooling to be more 'agent-friendly,' rather than the other way around.