What is an agent harness?

A harness turns a model into an agent. At... it’s core it provides 4 things: - a system prompt - tools - an agentic loop - a translation layer across models New blog post from Earendil co-founder colin hanna on what a harness is, and how you can own yours. Full post belowshow more

DeepSeek Harness is an agent harness where every component... is a plugin, built on Cordis for spatiotemporal composability. Run it via `npx deepseek-ai/dsh web` to get a local Web UI at port 3080. Explore it here:show more

this is the next $100B opportunity in ai ,... most will miss it's harness engineering what this agentic engineer reveals is insane >The model is almost irrelevant. The harness is everything >every failure is a signal about what the environment needs. >when agent throughput far exceeds human attention, corrections are cheap and waiting is expensive most people will ignore and bookmark. be different.show more

Building a harness to run scans with an agent.... It is absolutely garbage. Completely useless. There’s literally 0 benefit to using it over plain Claude Code. Everything it can do, you can just do via Skills etc. Many were preaching the benefits of a harness, but I’m not sure.show more

If you are trying to understand where AI agents... are going, learn harness engineering. A capable model is only one part of an agent system. Once the model begins reading files, calling tools, modifying state and working across many steps, the quality of the system depends increasingly on the software around it. Consider a coding agent working through a large repository. The model can decide that it needs to inspect a file, search for a symbol, make an edit or run a test, but those decisions do not execute themselves. The surrounding runtime has to decide which resources are available, whether the requested action is permitted, how the operation should be performed, what result should be retained, and what information should be presented to the model on the next step. This becomes harder as the run gets longer. As history accumulates, replaying everything can become costly and less effective. The harness has to decide what should remain in context, what should be summarized or retrieved later, and what belongs in persistent state outside the context window. Execution has similar problems. A long-running agent may need to survive an interruption, avoid repeating completed work, enforce permissions around consequential actions, and preserve enough history to reconstruct what happened when the final result is wrong. These are harness problems. The harness is the layer that manages context, tools, execution, state, checkpoints, limits and traces around the model. Harness engineering is the work of designing and improving that layer. Engineers inspect execution traces, evaluate agents on representative tasks, look for recurring failure modes, and then change things such as context selection, tool interfaces, state handling or execution controls. That last part matters because agent failures are often not fixed by changing the model. Sometimes the useful change is in what the model sees, how a tool is exposed, what state is preserved, or what the runtime does after a failed step. As agents take on longer tasks, the demands on this surrounding software grow. Model capability remains essential, but harness engineering is what turns that capability into an execution process that can be controlled, inspected, tested and improved.show more

We're giving you a $10 coupon to build on... Ori Harness this weekend What will you build? Run your favorite agent - Claude Code, Codex, DeepSeek, and more - with 500+ models, 70+ providers, all in one account, on OpenRouter Redeeming is easy:show more

🚨 ON VIDEO: An ICE agent in Minneapolis tells... an American citizen, “If you raise your voice, I will erase your voice.” This is a federal agent threatening someone for speaking. Watch carefully and decide for yourself what “erase your voice” means. This is not normal. This is intimidation.show more

Pink harness 💖 Pink harness 💖 Pink harness 💖... Pink harness 💖 Pink harness 💖 Pink harness 💖 Pink harness 💖 Pink harness 💖 Pink harness 💖 Pink harness 💖 Pink harness 💖 Pink harness 💖 Pink harness 💖 Pink harness 💖 Pink harness 💖 Pink harness 💖show more

Nimble is the web search launch partner for Omnigent,... the open-source AI agent meta-harness from @Databricks. Set search_provider: nimble in your config and every Omnigent-orchestrated agent gets grounded with live web search, tuned for your accuracy and cost requirements.show more

What if the right agent is one switch away?

She smiles when the judge says what she did... to an ICE agent. She is so proud. That smile disappears once he tells her what her sentence is. I don't think it's long enough.show more

Heartbreaking: Miami TE Cam McCormick got emotional after his... 9-year CFB career had come to an end. McCormick is now an undrafted free agent. What a career 💔🥹show more

Anthropic's agent harness has a 823-line retry system. Your... agent has try/catch. Most agent teams will spend 6 months discovering what's already sitting in Claude Code's source. I pulled apart all 331 modules so you don't have to.show more

one more thing from MiniMax-M2.7 with stronger EQ +... character consistency, we built and open-sourced an interactive agent character harness not just chat anymore agents can exist, act, and interact in a space Website: GitHub:show more

Lady shares video of the house an agent sent... to her vs what she met.show more

An agent handling internet money? Don't miss out. Something... is coming.show more

Democrats are saying that this was "attempted murder" by... an ICE agent. What do you think?show more