EAC design world is an AGPL-3.0, JavaScript-based plugin for DeepSeek Harness that turns the assistant into a local video production and design studio — multi-track editing, design systems, a native preview canvas and real file export — aimed at creators who want AI-assisted video and design work to stay on their own machine.

What it is

EAC design world is a Cordis/DSH plugin that runs inside DeepSeek Harness and adds three creation modes (normal, editing and Design), a separately laid-out template area, and a native作品 canvas on the right-hand side of the host. It ships as a Node.js 22+ project with its own standalone local workbench and an independent MCP entry, so the same engine can be driven from inside the Harness chat or outside it. The project is at v0.6.1, a development preview, with roughly 1,500 stars and 39 forks at the time of writing.

The concrete problem it solves is fragmentation between the place where an idea is discussed and the place where a video or a design file is actually produced. Templates, stock assets, cuts, colour and design source files are connected in one workspace, so an AI and a human can converge on something previewable, revisable and exportable. Within its ecosystem it explicitly replaces the need to install DaVinci Resolve or Premiere for editing, colour grading and rendering, which the plugin performs itself, while still offering handoff files for people who want to finish in those tools.

Key capabilities

• A multi-track timeline where clips can be dragged, trimmed from either end, or edited numerically by entering start time, source in-point, duration, volume and track, with saves carrying revision numbers.
• A design content library of 865 locally indexed items imported from OpenDesign — 152 design systems, 517 template entries, 169 creation skills, 13 base components and 14 scenes — supplemented by the Shotcraft snapshot of 150 shots across 10 motion categories, 59 of them curated.
• Stock sourcing through stock_search and stock-download, covering Pexels and Pixabay (free API key) and Wikimedia Commons (no key) for landscape footage, plus Jamendo CC music, with author and licence persisted alongside each asset.
• Parametric colour work: curves (master and RGB), HSL secondaries, hue curves, zone wheels, static local masks and camera input LUTs, supported by grade-preview comparison frames, scopes and color_workflow version and exposure-matching advice; global adjustments export as .cube.
• Beat-driven editing with beats analysis, clip.speed speed changes, clip.motion digital push, pull, pan and tilt, plus end-card fade, sharpen and vignette, backed by chunked multi-pass rendering so large timelines do not exhaust memory.
• Audio and subtitles in one path: Windows SAPI or macOS say narration, a local GPT-SoVITS Mambo Chinese voice, deterministic local instrumental music, source-track mixing, transcription with pause-stripped drafts, SRT and timeline subtitles, ASS burn-in, and H.264 output with technical checks.
• Design and handoff output: HTML, SVG and Markdown authoring with isolated preview, immutable revisions and source download, renderAt(t) and __seek(t) deterministic driving of CSS and GSAP timelines for frame-extraction review, PDF/PNG/PPTX page-image export, and an export panel producing Jianying drafts, Premiere/DaVinci FCP7 XML, SRT and LUT.

Who uses it and how

• Creators who start from a conversation: three modes and a template region whose selection tags can be removed without overwriting the message body, with the resulting work appearing on the Harness canvas.
• Desktop users on macOS and Windows, who get a standalone local workbench, an MCP entry that auto-discovers Chrome or Edge, screen capture through Windows gdigrab or macOS avfoundation, and desktop recording that leaves the original footage unmodified.
• Editors who keep human finishing in the loop: exporting Jianying drafts or FCP7 XML into Premiere or DaVinci while preserving drafts that have already been edited by hand.
• Designers producing websites, decks and documents, using isolated previews, immutable revisions and source-file download rather than an opaque export.
• Operators who care about maintenance: a dedicated maintenance centre in the top navigation for running and installed versions, signed updates, local updates, backup rollback, host hot reload and announcements.

Getting started

Download the release package from the project's GitHub Releases page and run it on Node.js 22+; the standalone local workbench can be used independently of the Harness plugin.

How it compares

The README names DaVinci Resolve and Premiere as the tools it removes from the critical path for cutting, grading and rendering, while offering FCP7 XML and Jianying draft export for anyone who still wants those applications in the finishing stage. It is careful not to claim feature parity with either: a separate professional-capabilities document sets out what is covered and what is not yet implemented.

When to use it — and when not to

Pick it if you want an AI-assisted, self-hosted pipeline where the footage, the design sources and the exported files stay local, and where a Harness chat is a legitimate starting point for a finished video. Do not pick it expecting a mature NLE: this is a v0.6.1 development preview, transcription requires you to supply your own local model, 205 of the 865 library items depend on external generation services, and template counts describe searchable content rather than templates that render offline out of the box. Self-hosters should also expect to provision the Node.js 22+ runtime and local voice and encoding tooling themselves, and to accept that spatial masks do not survive re-editing and that effect retention in exchange formats is governed by the handoff notes.

npm run motion:import -- --motion-web "D:\Sources\motion-web" --onetake "D:\Sources\onetake" --noncommercial
npm run motion:verify

node scripts/install-harness.mjs --profile "D:\YourHarnessProfile" --dry-run
node scripts/install-harness.mjs --profile "D:\YourHarnessProfile"

node scripts/install-harness.mjs --uninstall "<安装器返回的备份目录>"

npm ci --omit=dev
npm start

node node_modules/eac-design-world/src/server.mjs

git clone https://github.com/Ebony-Vinyl/EAC-design-world.git
cd EAC-design-world
npm ci
npm run build
npm start

{
  "mcpServers": {
    "eac-design-world": {
      "command": "node",
      "args": ["D:/Apps/eac-design-world/src/mcp.mjs"],
      "env": { "EAC_URL": "http://127.0.0.1:4173" }
    }
  }
}

Harness 对话 / 设置 / 原生右侧画布
                 │
        plugin/client.js + host.mjs
                 │
        本地 HTTP 服务 / MCP
                 │
       项目存储 · 修订 · 任务队列
            ┌────┴────┐
      FFmpeg / Playwright   设计成品存储
      录制、剪辑、混音     HTML / SVG / MD
      编码、字幕、抽帧     预览、历史、导出

npm ci
npm run build
npm test
node scripts/verify-picker-layout.mjs
node scripts/verify-open-design.mjs

plugin/       Harness 客户端与宿主入口
src/          项目、任务队列、媒体引擎、设计存储与 MCP
ui/           React 工作台、模板选择、编辑器与画布
public/       插件头像、真实模板封面、可选宣传片
vendor/       第三方模板源码、设计体系与许可
scripts/      安装、构建发布包、诊断与交互验证
tests/        单元、媒体与集成测试