DeepSeek Harness v0.2 lands on macOS and Windows, not Linux

The launch post for DeepSeek Harness v0.2 on Threads lists macOS, Windows and Linux, but users on Reddit and GitHub report that the new desktop app does not support Linux at the moment. If you are on macOS or Windows, you can download it now.

At a glance

• DeepSeek has released Harness v0.2, a desktop app that carries out work and coding tasks, and reports on Reddit and GitHub confirm it is available now for Windows and macOS.
• According to the launch post, Plugins and Workspaces are supported out of the box, and DeepSeek models power the agent that handles both the work tasks and the coding tasks.
• The announcement names Linux next to macOS and Windows, but users on Reddit and GitHub report that the v0.2 desktop app does not currently support Linux, which leaves Linux users without a build.

If you missed the first version: according to VentureBeat, Harness v0.1 came out as an MIT-licensed developer preview alongside DeepSeek-V4-Pro. It was pitched as an open-source alternative to integrated coding-agent environments such as Anthropic's Claude Code. VentureBeat says the repository warned that "THERE WILL BE COMPATIBILITY-BREAKING CHANGES" and called the tool model-agnostic but "not yet a full replacement" for Claude Code or Codex.

DeepSeek Harness v0.2 ships for macOS and Windows, with Linux missing for now

The v0.2 post lists three platforms. Reports on Reddit and GitHub confirm two of them: the desktop app is available for Windows and macOS and does not currently support Linux. DeepSeek describes the product in one line. It is a desktop app powered by DeepSeek models that executes work and coding tasks, with Plugins and Workspaces included from the start.

The post doesn't say what the agent can do, so the coverage of v0.1 is still the best guide. According to VentureBeat, the first version could already inspect repositories, edit files, run shell commands and search both files and the web. VentureBeat says it could also keep plans, invoke skills, hand work to subagents and enforce approval policies.

The v0.2.0-rc.2 notes bundle the dsh command into the desktop builds

The GitHub notes for v0.2.0-rc.2, a pre-release published 29 Sep, say the macOS and Windows Desktop builds bundle the dsh command for plugin management. That means you don't need to install Node or pnpm separately. You still have to install the command yourself, through the "Manage dsh command" item in the menu bar.

According to the same GitHub notes, the release adds an experimental asynchronous question mode that has to be configured by hand. It also updates the model catalog to pi-ai 0.87.1, which removes some older model IDs, so you may need to pick your saved model again. Linux comes up only once, in a bug fix that loads the login-shell environment for graphical Desktop launches on macOS and Linux.

How does a harness turn a model into an agent?

According to Microsoft, an agent harness is the runtime scaffolding that turns a language model into an agent. It drives model and tool calls, manages state and context, applies approval policies and keeps a multistep task moving. Visual Studio's documentation describes a single turn: the harness prepares instructions, context and tool definitions, the model replies or asks for a tool, and the harness checks permissions, runs the tool and returns the result.

Think of a chef and a kitchen manager. The chef picks the dish, and the manager fetches the ingredients and checks the rules. According to VentureBeat, DeepSeek built Harness (dsh) on Cordis, a framework of composable plugins whose principle is "Everything is a plugin". That covers everything from models and tools to sandboxes, loops and user interfaces.

The launch post itself gives no pricing, no system requirements and no default model, and the v0.2.0-rc.2 build on GitHub is labelled a pre-release. In our view, the weak spot is that the announcement lists Linux while the release notes describe desktop builds only for macOS and Windows.

Waiting for V4.1-Pro

The model under Harness is also changing. DeepSeek says that from 04:00 UTC on Sept 14, 2026, all deepseek-v4-pro requests route to V4.1-Flash, billed at V4.1-Flash rates, until V4.1-Pro launches. DeepSeek names WorkBuddy (including CodeBuddy) and OpenCode as official partners that fully support V4.1-Flash. No launch date has been given for V4.1-Pro.