DeepSeek Harness Lets Users Build Their Own Plugins; Comments Immediately Ask for a Linux Version

DeepSeek Harness has released Creator Mode. The official positioning is direct: Your Harness. You Define It. Users can turn their own ideas into plugins; the official examples include a design workspace, sandbox games, and a 3D LLM visualizer.

Under this tweet, the official account added a link to a prompt collection, available in both Chinese and English: https://cdn.deepseek.com/harness/dsh-creator-mode-prompt-collection-en.html . People who want to build plugins can start with these prompts; at least they'll know what the official team expects you to hand over to Harness.

The reaction in the comments is more grounded than the marketing copy. Some are focused on the sandbox game plugin and say they'll try that first; some ask directly about the 3D LLM visualizer; some ask whether the video was made with DSH; and others ask when the Linux version is coming. One comment sums up the shift clearly: in the past, everyone tried every possible way to embed LLMs into applications; now DSH lets you build any application on top of an LLM.

That claim is a bit broad, but the direction is not wrong. What's worth watching about Creator Mode is the change in entry point: before, if you wanted a feature, you waited for an official update; now the official team has put plugin development front and center, letting you assemble things with prompts, skills, and runtime slots. Whether you can assemble a stable product is another matter, but the cost of trial and error has been lowered.

A user re-edited a promotional video for DSH using huashu-motion. In the footage, you can see a specific request: help me write a Pomodoro timer plugin. Below it are listed: load skills, read SKILL.md, think about shell.overlay, check providers, and query runtime Slots.listSubTree. This detail is more useful than the slogan; it shows that a plugin isn't finished with one natural-language sentence. Behind it are skill files, runtime slots, and a checking process.

Another user shared a self-test screenshot of an Email Workbench, titled Email Workbench Send Self-Test, with the time showing November 1, 2026. This example isn't cool, but it closely resembles a real workflow: first get email sending and receiving working, then talk about the plugin ecosystem.

The official account did not go into the plugin marketplace, review, distribution, or cross-platform support in this tweet. Some in the comments have already asked about a Linux version, and others hope it will come to t3code. Creator Mode now feels more like an opening: first give users the power to define things, then see how the ecosystem grows on its own.

Ordinary users don't need to rush into writing plugins. They can first look at the official examples and prompt collection to judge what kind of pain point it solves: whether it's about cramming repetitive workflows into a custom interface you define, or packaging LLM capabilities into a callable tool. For developers, the most worthwhile thing to try is that Pomodoro timer. It's small, has clear boundaries, and can verify whether skill loading and runtime slots actually work smoothly.

This time, DeepSeek Harness didn't pile on a feature list; it offered just one action: you define it. As for whether what gets defined is a toy or a tool, the comments section will soon provide the answer.