DeepSeek Open-Sources 'Harness' Agent Framework: Everything is a Plugin
机器之心 · wechat · 2026-08-13
DeepSeek has launched and open-sourced its Agent framework, DeepSeek Harness (dsh), positioning it as a highly customizable alternative to Claude Code. Built on the Cordis plugin system, its core design principle is "everything is a plugin."
- Fully Plugin-based Architecture: Model access, tool registration, session logs, approval policies, and even the main loop are composed of plugins that can be freely replaced without altering core code.
- Layered Assembly: Achieves multi-layer config overlay via Bundle, Profile, and Patch for precise targeting and overrides.
- Multiple Modes: Includes Standard, PTC (Programmatic Tool Calling, which batches multi-step tool calls into a single code execution to save context), Minimal, and Creative modes.
- Multi-Agent & Workflows: Supports background subagents, one-off forks, script-based workflow engines, and the Ralph loop (stateless retries until success).
- Security & Governance: Features built-in process sandboxing (three isolation tiers), approval gates, credential protection (no keys in logs), and loop-hygiene guards.
- Ecosystem: Natively supports MCP, is compatible with Claude Code/Codex Hooks, and offers WebUI, CLI, and Python/TS SDKs.
Related event: DeepSeek Open-Sources Agent Framework Harness in Preview(22 posts)→
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