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DeepSeek Launches Its First Agent Product, Harness, Focusing on Custom Presets and Plugins

DeepSeek has officially launched its first agent product, DeepSeek Harness, a local agent workstation that supports project management, long-task collaboration, multi-agent orchestration, context management, web search, and Skills. Unlike Codex-like products, Harness emphasizes customizable agent presets, rebuildable sessions, and powerful plugin capabilities, aiming to change how users interact with agents.

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DeepSeek Harness Review: More Than a 'DeepSeek Version of Codex' — It's a Reconfigurable Agent Runtime

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DeepSeek has released its first agent product, Harness, claiming 'everything is a plugin.' Hands-on testing shows that with the same model, Harness's execution layer can significantly alter the final output. It feels more like a reconfigurable, replayable agent runtime than a simple Codex competitor.

  • DeepSeek Harness is DeepSeek's first agent product; the beta already includes project management, long-task collaboration, multi-agent orchestration, context management, web search, and Skills.
  • Harness ships with four agent presets: Minimal, Standard, Code, and Creative, each suited to different tasks, and supports custom presets.
  • Plugins are the core of Harness; beta users have developed about 300 plugins in a few days, capable of modifying the interface, implementing long-term memory, and even enabling model self-evolution.
Open section navigationLaunch and Positioning

Launch and Positioning

DeepSeek officially released its first agent product, DeepSeek Harness. Earlier, the V4 Flash release notes mentioned using Harness's Minimal mode as a test framework, hinting at Harness's existence. APPSO obtained beta access before the launch and noted that Harness includes common features of a local agent workbench, but it's not simply a 'DeepSeek version of Codex.'

Harness's uniqueness lies in its 'agent preset' system, which differs from Codex's scenario-based approach by combining tools, prompts, and capabilities through presets. It includes four built-in presets: Minimal mode for simple edits without compression, search, or Skills; Standard mode for everyday coding and project analysis; Code mode for large-scale searches and parallel reads; and Creative mode (cordis) for developing new presets or plugins.

A preset is essentially a configuration document containing system prompts, tools, context compression, and multi-agent capabilities. Users can copy presets or use Creative mode to have the agent create new ones. Harness also allows integration with third-party models, with default providers including Kimi, OpenAI, Anthropic, Google, and nearly 40 others.

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Credibility boundary

This article is based on APPSO's exclusive beta testing report; all feature descriptions and test results come from that report and have not been independently verified. The beta version may differ from the final release, and a single test case cannot be taken as a general conclusion.

Sources for this version

  1. 首发体验 | DeepSeek Harness 来了，它不想做下一个CodexAPPSO

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APPSO

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