DeepSeek Harness
deepseek.com- Category
- AI Agents
- Rank
- No. 1331Tools index
- Pricing
- Open Source
- Platform
- web · cli
- Type
- TOOL
- Added
- Aug 16, 2026
About
An open-source, plugin-based agent harness from DeepSeek where every capability—model, tools, skills, sessions, sandboxing, storage, scheduling, UI—is a swappable plugin composed via the Cordis kernel. It logs every model input/output to an append-only trajectory for replay, forking, and debugging, and ships with Standard, PTC (code-mode), Minimal, and Creative agent modes.
What it can do
Swap or recombine agent capabilities (model, tools, skills, sessions, sandboxing, storage, scheduling, UI) via configuration
Configuration settings → Recomposed agent runtime
Log every model input/output to an append-only trajectory
Model input/output data → Append-only trajectory log
Replay or fork recorded agent trajectories for debugging
Trajectory log → Replayed or forked session
Run agents in different preset modes (Standard, PTC/code-mode, Minimal, Creative)
Mode selection → Agent behavior configured to selected mode
Why it made the leaderboard
Lets you compose a coding agent from swappable parts — swap the model, sandbox, storage or UI without rewriting the loop — instead of accepting a vendor's fixed stack. Append-only trajectory logging of every model input/output makes runs replayable and forkable, which is rare in open harnesses and valuable for debugging agent behavior.
Intel on DeepSeek Harness
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Indexed by a proprietary survey. Corrections welcome.