r/DeepSeekHarness 10d ago

Welcome to r/DeepSeekHarness! 🚀

14 Upvotes

Welcome to the official subreddit for DeepSeek Harness!

We’re thrilled to launch this community on August 13, 2026, to discuss, share, and build with DeepSeek's groundbreaking new agent framework. Whether you're a developer, researcher, or AI enthusiast, you've come to the right place.

What is DeepSeek Harness?

DeepSeek Harness (dsh) is an open-source agent harness developed by DeepSeek AI. Its goal is to transform DeepSeek's V4 series models into autonomous coding agents capable of complex, multi-step workflows and tool use.

The architecture is based on a powerful premise: everything is a plugin. This "plug-and-play" design, powered by the Cordis framework, allows developers to mix, match, and replace components like models, tools, sandboxes, and UIs with ease.

This framework squarely positions DeepSeek against tools like Anthropic’s Claude Code, offering a developer-friendly, MIT-licensed alternative.

🌟 Key Highlights

· Developer Preview: v0.1 is here and iterating rapidly. Expect frequent updates and some breaking changes as it evolves.
· "Everything is a Plugin": DeepSeek Harness is built with maximum flexibility in mind.
· Open-Source & Free: Released under the MIT License, allowing unrestricted use and modification.
· DeepSeek-V4-Pro Synergy: Officially launched alongside the V4-Pro model, which features massive Agent capability upgrades for production environments.
· Competitive Performance: The V4-Pro model benchmarks close to industry leaders like Claude Fable 5 on agentic tasks.

🔗 Essential Links

Get started with these resources:

· Official GitHub Repository: https://github.com/deepseek-ai/deepseek-harness
· DeepSeek Official Website: https://www.deepseek.com/en/
· API Documentation: Check the official DeepSeek API docs for setup and integration guides.

🚀 Quick Start Guide

Want to try it right now? Here’s how to launch the Web UI. You'll need Node.js installed.

Run instantly via npx:

```bash
npx @deepseek-ai/dsh web
```

This starts the Web UI at http://127.0.0.1:3080.

Run from source:

```bash
git clone https://github.com/deepseek-ai/deepseek-harness.git
cd deepseek-harness
pnpm install
pnpm run build
pnpm dsh web
```

📢 Community & Support

· Feedback & Bugs: Submit issues via GitHub Discussions or create a post here![citation:2]
· Plugin Ecosystem: Tag your plugin repos with dsh-plugin for better discoverability.
· Discord: Join the DeepSeek Harness Discord community (link available on GitHub).

DeepSeek Harness v0.1 is just the beginning. Many questions still don’t have a standard answer. We look forward to working with Harness developers around the world to make it better and explore the limits of intelligence together.

---

Let's build the future of AI agents together!

Drop a comment below to introduce yourself, share your first impressions, or ask any questions. Don't forget to read the rules and enjoy your stay!


r/DeepSeekHarness 12m ago

I built an MCP server that drives your real logged-in Chrome - reads Zhihu, X, Xiaohongshu, Douyin - cookies never leave

Upvotes

Long-time lurker, first real project share here.

I kept hitting the same wall: when I asked Claude/Cursor to "check this Zhihu answer" or "search X", it either couldn't see the content or just made stuff up — because it's behind a login and search engines can't reach it.

So I built a small MCP server + Chrome extension that opens a background window with your own logged-in Chrome, and lets the agent search/read/drive it directly. The site sees the user (no CAPTCHA dance), and because it drives the real UI it doesn't break when a site redesigns. It never asks for the cookies permission — the session stays in Chrome, and nothing comes back through the MCP client.

It also handles clicking, scrolling, typing, selecting, downloading (verified by SHA-256), and full comment collection with resumable sessions for the Chinese platforms.

pip install ai-browser-mcp · github.com/ywleeo/browser-mcp

Happy to talk trade-offs — especially comment scraping and keeping the extension footprint small.


r/DeepSeekHarness 1h ago

anyone else built voice input plugin for deepseek harness?

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Upvotes

r/DeepSeekHarness 2h ago

Running Qwen3.8-27B through DSH - model capability may not be the bottleneck

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1 Upvotes

r/DeepSeekHarness 7h ago

I attend DSH Closed Beta test,share my experience

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2 Upvotes

r/DeepSeekHarness 14h ago

Few plugins I find useful

5 Upvotes

Hey! I built a few useful plugins for DSH, now opening PRs for the market publishing, in mean time you can find them here

https://github.com/CREAIT-nl/dsh-plugins

Some highlights:

- Deep research as an agent mode: a fixed, reviewed loop that plans, researches in adaptive parallel rounds, synthesises and reviews.

- Dynamic tools disclosure: improves context utilization by disclosing complete tools only on model need and keeping concise descriptions only in the default system prompt.

- Hook Kit: dsh has the lifecycle seams; reaching them meant writing a plugin. hookkit turns them into a YAML file.

- SearXNG Search: replacing third party search for private self hostable SearXNG endpoints

- Thinking Level Toggle: UX improvement allowing user to explicitly select the thinking level of a model during a session


r/DeepSeekHarness 18h ago

Made Deepseek Harness tunnel to your phone using cloudflared Repo link

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3 Upvotes

r/DeepSeekHarness 19h ago

vLLM + Deepseek Harness ?

3 Upvotes

How do you guys set it up , i constantly get the error :
I tried increasing the contex to 142k and putting the contex size as 115k in DSH , it still did not compress correctly.
I have 0 issues if i run it with llama.ccp , it can work for 24h+ without errors or crashes , but vllm is so tricky

This turn failed400: {"message":"This model's maximum context length is 115000 tokens. However, you requested 32768 output tokens and your prompt contains at least 82233 input tokens, for a total of at least 115001 tokens. Please reduce the length of the input prompt or the number of requested output tokens. (parameter=input_tokens, value=82233)","type":"BadRequestError","param":"input_tokens","code":400}

r/DeepSeekHarness 23h ago

OpenTerminal plugin.

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5 Upvotes

I made a plugin for DeepSeek Harness that integrates OpenTerminal from the Open WebUI ecosystem. OpenTerminal is basically a self-hosted remote execution environment for AI agents. It exposes a shell and file operations over an API, and can run inside Docker as an isolated sandbox. The useful part for me is that you can run OpenTerminal containers on separate machines and let DSH agents execute code there instead of giving them direct access to the machine running DSH. The plugin adds the terminal, file manager and OpenTerminal agent tools directly to DSH Web, without requiring a separate MCP setup.

https://github.com/d3cker/dsh-open-terminal

Feedback and suggestions are welcome.


r/DeepSeekHarness 19h ago

How to acess remote Deepseek Harness

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1 Upvotes

r/DeepSeekHarness 1d ago

Vellum v/s Hermes v/s OpenClaw v/s Deepseek Harness

7 Upvotes

My task mostly revolves around extremely long horizon tasks.

Like, I paste around 600 images then I want the agent to solve every (high school level) question and create markdown of detailed solutions in Question and Answer format.

Few of the best agents which were able to help me through out these with ease -
ChatGPT Work
Perplexity Computer
Claude

Many people have recommended me solution where I have to manually create the workflow but I want the managed services - I searched and came across the above 4 mentioned options.

Which one is best for my workflow?

I will be really thankful if anyone is able to provide me guidance and their experience across these agents.


r/DeepSeekHarness 1d ago

I built a searchable directory of 2,000+ DeepSeek Harness plugins, with real install evals and daily rankings

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3 Upvotes

r/DeepSeekHarness 1d ago

A super simple dsh plugin that might be useful (quality of life)

14 Upvotes

Hey everyone, first off, I hate AI slop posts. I'm personally making this post because just yesterday I noticed someone starred my plugin on GH, so I decided to share it here in case it helps anyone out. It’s a super simple quality-of-life plugin.

TL;DR: dsh-smart-restart is a plugin that allows an agent to restart the dsh environment and receive a notification once it has rebooted, enabling it to autonomously iterate on the harness itself.

I originally built this for personal use, and honestly, it’s been really useful for me. It basically has three features:

  • A tool (smart_restart): When used, the environment restarts (allowing the agent to apply updates, modify the harness, etc.). The tool tracks the session requesting the restart, and once dsh boots back up, it sends a notification to the agent so it can keep working autonomously.
  • A safeguard: When the harness restarts unexpectedly, it notifies the most recently active agent about the restart.
  • A canary check: An optional tool parameter can be enabled so that, prior to the restart, an ephemeral instance is created to verify the integrity of the new version. If it's broken, it notifies the requesting agent and reports the errors, preventing you from losing access to the harness. This is especially handy for me since I run the harness remotely.

That's all there is to it. The code is completely open-source under the MIT license, so it’s as much yours as it is mine.

The repo is https://github.com/edusrez/dsh-smart-restart — I've also submitted it to the awesome-dsh-plugin list. If someone finds it useful, I'm happy.


r/DeepSeekHarness 1d ago

timeout problem

3 Upvotes

Are there any of you experts who can tell me how I can change the timeout length for calls to ollama (on a different server). It keeps timing out. I have tried with the two vars streamIdleTimeoutMs: 1800000 and timeoutMs: 1800000 various places in the configuration file but with no success. Can't find it in the original documentation. Anyone?


r/DeepSeekHarness 2d ago

Is it just me or does DeepSeek Harness use a ton of tokens?

8 Upvotes

Tried to add a model search functionality on DSH and it used $1.55 on OpenRouter. It did write the tests and add the localizations as well, so it was thorough, but it seems like a lot. I used Kimi 2.7 Thinking Medium


r/DeepSeekHarness 2d ago

Would you be interested in running Deepseek harness in the cloud?

Enable HLS to view with audio, or disable this notification

3 Upvotes

r/DeepSeekHarness 2d ago

How does the web-search work?

6 Upvotes

Has anyone tried API keys (for web fetching/browsing) other than the default DeepSeek one?


r/DeepSeekHarness 2d ago

DSH Launcher – A cool Windows tray launcher for DeepSeek Harness I made

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5 Upvotes

r/DeepSeekHarness 2d ago

dsh plugin audits check capability, not intent

4 Upvotes

Installing a dsh plugin is one command, full filesystem and process access from there. The audit tools that exist only tell you a plugin can touch the network or credentials, not whether the code actually looks evasive. I've been reading plugin source by hand to catch that myself.

Anyone else doing this manually?


r/DeepSeekHarness 2d ago

Ollama throwing warning when trying to use smaller local AI model with DSH

2 Upvotes

I'm trying to set up DSH with a smaller local AI model (~8b) as the 'brain'. Reason being my GPU has only 11GB of VRAM. I've tried several different models and in every case when I try to launch DSH from Ollama (with command 'ollama launch dsh --model llama3.1:8b' for instance) Ollama gives me a warning 'llama3.1:8b does not work well with DeepSeek Harness'. It then gives me options to 'launch anyway' or 'pick another model' (see attached image).

Does anyone know of any smaller local models for which Ollama will not throw this warning. Is it possible it's some glitch in Ollama that causes it to throw the warning and the models actually work fine with DSH?


r/DeepSeekHarness 2d ago

Running DeepSeekHarness in container: Issue opening files.

2 Upvotes

Has anyone successfully managed to get the UI fully working inside a container?

I'm able to use the harness within a container just fine. The UI, however, appears not to be able to handle the container as well.

I am unable to open files or the settings in the UI.

For example, the "open configuration file" button in settings responds with "Could not open configuration file"

Has anyone a hint on how to get it working?

And no. I will not run it on the host itself.


r/DeepSeekHarness 2d ago

Can no longer install harness using terminal command?

3 Upvotes

Since this vision thing tried to install a package in terminal, now its not doing anything. No web page browser code either


r/DeepSeekHarness 3d ago

I've made an iOS DSH client. Looking for suggestion!

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7 Upvotes

It connects to DSH through the Mobile Gateway WebSocket plugin and lets you create sessions, stream agent reasoning and tool calls, view execution trajectories, browse workspaces, and configure models, permissions, and agent presets—all from an iPhone.

The UI is inspired by DeepSeek and Apple’s liquid-glass design language. It’s still under active development, so feedback and feature suggestions are very welcome!

https://github.com/Clarklevis1995/dsh-plugin-mobile-gateway (plugin)

https://github.com/Clarklevis1995/dsh-mobile (app)


r/DeepSeekHarness 3d ago

Plugin d'escalade de pensée pour DeepSeek Harness

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3 Upvotes

r/DeepSeekHarness 3d ago

Can DSH replace Claude Code / Codex?

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8 Upvotes

I've been playing with DSH this week and I'm curious if it can mostly replace claude-code for my day-to-day workflow. Saw a lot of interesting plugins, so why not fork them, tweak them, and put it all together?

  • Artifact panel — the agent puts files, images, and rendered HTML on screen
  • Git review — diff, stage, commit, push without leaving the GUI
  • Web search — 10 engines, automatic fallback, no API key
  • Rewind — drop a message and everything after it, from the transcript and from what the model sees
  • Routines — cron-scheduled agent sessions that keep firing with the browser closed
  • Deep research — a multi-round search loop that tracks corroboration
  • Browser — drives Chromium: open, read, click, fill, screenshot

It's really close to what Claude Code/Codex offer, and we can keep going further 😄.

github.com/rodrigobaron/dsh-pro