DSH Steam Startup Animation

简体中文

A Steam Big Picture-style six-second startup sequence for DeepSeek Harness Desktop: a pressure-stroke terminal workstation draws itself, flows into a ring, and reveals the official DeepSeek whale and wordmark. Optional original startup audio plays at its original speed in stereo.

Package: @bilbillm/dsh-startup-animation. Component: bilbillm-startup-animation.

Install in Desktop

Requires DeepSeek Harness 0.2.1-rc.3 or later in the 0.2.x line.

1. Download dsh-startup-animation.tgz from Releases.
2. Open Desktop's Plugins page, choose Add plugin, and enter the local tarball path (or its release download URL).
3. Enable the plugin and reload the application when requested.

Install through Desktop's plugin manager so it targets Desktop's own profile. A separate web profile does not change the Desktop application.

For a regular web profile:

dsh plugin --profile web add https://github.com/bilbillm/dsh-steam-startup-animation/releases/latest/download/dsh-startup-animation.tgz

Automatic playback is desktop-only by default; enable web playback on the plugin's page if wanted.

Controls

Open the plugin's own detail page to enable startup playback, switch audio, set volume, allow web playback, or play a preview. Preferences are stored locally in the current application's browser storage and take effect at the next startup or preview.

• Esc or Skip dismisses the animation immediately.
• System reduced motion skips automatic playback.
• A browser that blocks automatic sound shows Enable sound. The animation continues and ends on time.
• Switching tasks or changing plugin configuration does not replay the opening. Reloading the application starts a new opening.
• The final background darkens with the whale, then reveals the running application. No mock application is included.

The plugin does not read conversation content or credentials, make network requests, modify host code, or add install-time scripts. Audio, artwork and light-field data are packaged in the client. Disabling/unloading it stops audio, cancels animation frames, removes observers/listeners, restores focus and releases the overlay.

The Canvas renderer runs in a dedicated OffscreenCanvas worker, so Harness startup tasks can load while the artwork continues drawing. A compositor animation handles the final fade. Browsers without worker rendering use the same artwork through a main-thread fallback.

Development

The source checkout includes the prebuilt lib/ files and needs no install-time compilation. Rebuild with Node.js 22+:

npm run check
npm pack

With Playwright available, tests/browser.cjs checks the fallback lifecycle, tests/worker-lifecycle.cjs checks worker completion and recovery, and tests/startup-contention.cjs verifies that a 180 ms host task does not freeze the startup. DSH_PLAYWRIGHT_MODULE can point to an existing Playwright installation. scripts/build.mjs uses only Node built-ins; React and Cordis slots come from the running host. The plugin registers plugins.bundle.config through the public slots API.

Credits and license

Plugin code is MIT licensed. DeepSeek branding and Valve's Steam startup audio remain their owners' material and are excluded from the code license. See third-party notices.

This is an independent community plugin, unaffiliated with DeepSeek or Valve.