DeepSeek Launches Harness: A Fully Pluggable Agent Runtime
APPSO · wechat · 2026-08-13
DeepSeek has officially released its first Agent product, DeepSeekHarness. Rather than being a simple 'DeepSeek version of Codex', it functions as a recomposable and replayable Agent runtime, integrating plugin lifecycle, tool execution, session logs, and WebUI into a single core.
Core Features & Design:
- Agent Presets: Features four built-in modes (minimal, standard, code, and cordis) tailored for tasks ranging from minimal testing to plugin development. Users can also create custom presets via natural language.
- Everything is a Plugin: From model adapters and tools to prompt rules and frontend UI components, everything can be replaced or recombined. During beta, users developed around 300 plugins, including UI modifications and cross-session long-term memory.
- Underlying Tech: Utilizes an Agent Loop that 'logs intent before executing side effects' and saves the complete event stream. The frontend itself is a plugin tree, allowing components to register into standard mount points.
Real-World Testing:
In a benchmark task generating a Three.js game using the DeepSeek-V4-Flash model, DeepSeekHarness outperformed Reasonix and Codex in aesthetics and gameplay. This demonstrates that Harness's context organization and execution strategies can significantly enhance final outputs when the underlying model remains identical.
Related event: DeepSeek Open Sources Plugin-Based Agent Framework Harness v0.1(36 posts)→
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