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DeepSeek Harness Desktop Client Surfaces on the Nightly Channel: Apple-Notarized Build Confirms Official Identity, No Announcement Yet

On September 25, 2026, community findings and Machine Heart's hands-on confirmed an official DeepSeek Harness desktop client: the installer is signed by DeepSeek's Apple developer certificate and notarized, distributed via the nightly channel with no official announcement yet. The client ships account/API Key login, a local workspace, four work modes and six official plugins; official v0.1.7-series release notes now carry extensive desktop entries, with macOS and Windows builds available and Linux unsupported for now.

September 25, 2026 · Source: https://github.com/deepseek-ai/deepseek-harness/releases

Direct answer: A native desktop client for DeepSeek Harness has surfaced via the nightly channel — verified by community download, install and Apple's notarization record as signed by Hangzhou DeepSeek Artificial Intelligence Co., Ltd., though DeepSeek has made no official announcement. Official v0.1.7-series release notes now carry extensive desktop entries, confirming the client is wired into the mainline.

What the client looks like

Per Machine Heart's hands-on (September 25): open the app, sign in with a DeepSeek account or an API Key, pick a local folder as the workspace, and assign tasks to the Agent like any desktop AI app. A first-run onboarding flow asks about your use case (office & research, coding, etc.) and preferred workflow — matching the "first-use onboarding" entry in the official v0.1.7-rc.2 changelog.

Four work modes: Standard for most tasks; PTC, where the model writes a small program to batch-organize and invoke tools; Minimal, terminal-only, closest to a classic coding agent; and Create, where the Agent composes plugins, features and modes — consistent with the "Everything is a Plugin" architecture.

Six official plugins are built in: Agent Teams (multi-agent collaboration, experimental), Voice Input (local SenseVoice, experimental), Terminal, Agent Loop, Subagent, and Web Search.

Official signals

  • The installer is signed and Apple-notarized under Hangzhou DeepSeek Artificial Intelligence Co., Ltd. — the company entity itself, not a third party.
  • Official v0.1.7-rc.2 release notes (verified on GitHub) include desktop entries throughout: first-use onboarding, background running after window close, desktop shortcut management, Windows installer fixes, macOS window-drag fixes and Markdown image preview in desktop chats.
  • Still nightly-channel only: no standalone release tag, no announcement. The repo README still recommends npx @deepseek-ai/dsh web as the standard path. Linux is not supported yet.
  • The repository has grown to 235k stars as of September 25 (official page), up from 181k on August 22.

How to read it

Until now DSH's recommended entry was a terminal command — distinctly a developer tool. A notarized desktop client with onboarding, work modes and voice input aims squarely at mainstream users. It also slots into the site's Agent Harness glossary and comparison hub: the harness race is no longer about architecture alone but about who lowers the usage floor fastest. Treat it as a candidate build in official distribution, not a stable release — expect rough edges and fast iteration (Machine Heart's fresh install already prompted an update).

Sources

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