An agent harness is the software around a model: the loop, tools, context, permissions and logs. These guides explain what goes into one, compare the harnesses you can use today, and show how to run them safely on a server.
An agent harness is the software around a language model that gives it tools, context, permissions and a loop. Here is what goes into one, and why it decides whether an agent works in production.
Which agent harness should you use? A plain-language comparison of the main coding agents, self-hosted personal agents and control surfaces: what each is built for, why it is good, and where it falls short.
T3 Code is a free, open-source app for driving Claude Code, Codex, OpenCode and other coding agents from one place: desktop, web or phone. How it works, how to set it up, and where it falls short.
Hermes Agent from Nous Research is an open-source, self-hosted agent that remembers, learns skills and lives in your chat apps. What it does, when it is worth using, and a step-by-step VPS setup with sensible security.
Running Hermes, OpenClaw, T3 Code or Claude Code on an always-on server makes agents more useful and, done right, safer. When it is worth it, which setup fits which harness, and a security checklist.
More topics: Claude CodeAI in operations All insights
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