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Glossary5
Open the full glossary- HarnessThe layer of code wrapped around a model: assembling context, calling the model, parsing output, running tools, gating permissions, feeding results back.
- Harness EngineeringHarness Engineering designs and improves an Agent Harness.
- CLI AgentA CLI Agent is an Agent / Harness that reads files, edits files, and runs commands from a terminal.
- Computer UseComputer Use lets the model read the screen and propose mouse or keyboard actions; the harness checks rules and the executor acts. It is the biggest, riskiest door.
- Permission gateThe decision point before an action runs: allow, ask a human, or deny — enforced by harness code, not left to the model's goodwill.
Found 11 articles
PStack Deep Dive (Part 2): Two Agents, Five Special Designs, and How It Actually Lands
The executors of pstack: poteto-agent, comment-sicko, the benny automation, five special designs, and notes on landing it in OpenClaw and DeepSeek Harness.
The AI Coding Tools Map: Recognize the Form Factor First, Memorize Names Later
Cursor, Trae, Claude Code, Codex, OpenClaw, Hermes Agent, DeepSeek Harness, WorkBuddy and Doubao Work sorted into three categories by form factor: IDE-embedded, terminal agent, and orchestration platform. For each category: what it gives you, how much control and visibility it takes away, and how people actually mix them in practice — so you can decide which category your first tool should come from.
The Evolution of the Harness: Six Eras, Each With Its New Capabilities and New Ways to Crash
From pure-prompt chatbots, CoT and ReAct reasoning prompts, and function calling — the real turning point — to MCP standardization, long-running CLI Agents, and always-on multi-Agent orchestration: era by era, what new capability the harness gained each time, and what new failure mode that capability incidentally introduced.
What an Agent Harness Is: The Ordinary Program Wrapped Around the Model
The horse-and-harness metaphor makes the concept clear: the layer of engineering code wrapped around the LLM — assembling context, executing tools, running the loop, managing permissions. It explains why the same model can perform worlds apart under a different harness, and why picking an AI tool is, to a large extent, picking a harness rather than a model.
What Is DeepSeek Harness: The Open-Source Agent Runtime Where 'Everything Is a Plugin'
DeepSeek's officially open-sourced agent runtime (npm package @deepseek-ai/dsh) bundles sessions, tools, workspaces, sandboxing, approvals, the agent loop, and dual interfaces, under the design slogan 'Everything is a Plugin'. One article covering what is in the box, what it looks like running, what it is not, and the mindset the developer-preview stage calls for.
Installing DeepSeek Harness: Two Paths, Web GUI and Terminal
How to install DeepSeek Harness (dsh), DeepSeek's official open-source agent runtime: launch the Web GUI with npx @deepseek-ai/dsh web, set your key under Settings → Models, choose a workspace, run your first task, plus the terminal-only route via the headless profile. Every step spells out the expected output and the real errors the official docs list.
Harness Engineering: The Workbench Around Your Agent
Your agent writes code in demos but breaks in production because you trained a brain without building a workbench. Five diagrams and everyday metaphors unpack Harness Engineering core concepts and rollout steps.
A Source-Level Architectural Dissection of DeepSeek Harness: How an Everything-Is-a-Plugin Agent Framework Is Built
Dissecting the complete architecture of DeepSeek Harness (dsh) from 219 workspace packages and 450k lines of TypeScript: the Cordis plugin foundation, Event Sourcing session log, the three roles of capability seams, a single home for policy + fail-closed approvals, four layers of context engineering defense, and an equally plugin-based frontend. Includes a porting assessment for in-house Agent infrastructure.
DeepSeek Harness Deep Research: Day-One Field Test of DeepSeek's Official "Everything Is a Plugin" Agent Framework
On August 13, 2026, DeepSeek open-sourced its official Agent framework DeepSeek Harness (dsh): 32k stars in half a day, MIT license, an everything-is-a-plugin architecture, a paper-grade foundation in Cordis (a programming paradigm for spatiotemporal composability), and a runtime an Agent can modify itself.
Deep Research on Prime Agent: PrimeIntellect's Self-Improving RLM Agent and Our Field Test
A complete breakdown of Prime Agent, the self-improving Agent framework open-sourced by Prime Intellect in August 2026: the dual abstractions of RLM + Continual Harness, surpassing the human baseline on ARC-AGI-3, an architecture comparison with OpenClaw infrastructure, and a complete field test record of connecting it to our own API relay layer on a Mac Studio.
YC Open-Sources QM: Source-Level Teardown of the 'Whole-Company Agent Operating System' That Hit 12K Stars in 7 Days, with More Security Code Than Model Loops
On July 31, 2026, Y Combinator open-sourced its internal Agent system QM (Quartermaster). Clone test: 241K lines of TypeScript, 379 test files, 4 interchangeable harnesses (Pi/OpenCode/Codex/Claude Code), egress proxy re-resolves DNS for each request, three-person gate 'a wall, not a hole', npm supply chain 7-day cooldown period: complete source-level dissection