https://blog.dev.simpleenough.net/tags/agent/Recent content in Agent on Simple Enough BlogHugoenWed, 27 May 2026 15:55:01 +0200https://blog.dev.simpleenough.net/blog/harness_intro/Wed, 27 May 2026 15:55:01 +0200https://blog.dev.simpleenough.net/blog/harness_intro/<h2 id="i-what-is-a-harness-for-ai-agents" class="heading">I. What is a Harness for AI Agents?<a href="#i-what-is-a-harness-for-ai-agents" aria-labelledby="i-what-is-a-harness-for-ai-agents"> <!-- <i class="fas fa-link anchor"></i> --> <svg class="svg-inline--fa fas fa-link anchor" fill="currentColor" aria-hidden="true" role="img" viewBox="0 0 640 512"><use href="#fas-link"></use></svg>&nbsp; </a> </h2> <p>When you first discover tools like <strong>Claude Code</strong>, <strong>Cursor</strong>, or <strong>OpenAI Codex</strong>, it is easy to assume that a simple language model is capable of understanding an entire codebase, fixing bugs, executing commands, and running tests autonomously.</p> <p>However, the technical reality is far more interesting.</p> <p>The AI model is often only one piece of the system. Behind these tools lies a much more important layer than it first appears: the <strong>harness</strong>.</p>