Open Codesign AI Design

Open CoDesign AI Design Skill

Skill by ara.so — Design Skills collection.

Open CoDesign is an MIT-licensed, local-first desktop application that transforms prompts into polished prototypes, slide decks, and marketing assets. It's the open-source alternative to Claude Design, v0, Lovable, and Bolt.new — letting you bring your own API key (BYOK) for Claude, GPT, Gemini, DeepSeek, Ollama, or any OpenAI-compatible endpoint.

Key capabilities:

• Prompt → prototype/slides/PDF generation
• Multi-model support (20+ providers)
• Desktop-native Electron app (macOS 12+, Windows 10+, Linux)
• Local-first with workspace-backed sessions
• Version history and iteration tracking
• Comment mode for targeted edits
• AI-generated tweaks panels (color pickers, sliders)
• Export to HTML, PDF, PPTX, ZIP, Markdown

Installation

Package Managers (Recommended)

macOS:

brew install --cask opencoworkai/tap/open-codesign

Windows (Scoop):

scoop bucket add opencoworkai https://github.com/OpenCoworkAI/scoop-bucket
scoop install opencoworkai/open-codesign

Windows (winget - pending approval):

winget install OpenCoworkAI.OpenCoDesign

Direct Downloads

Download from GitHub Releases:

• macOS (Apple Silicon): open-codesign-*-arm64.dmg
• macOS (Intel): open-codesign-*-x64.dmg
• Windows (x64): open-codesign-*-x64-setup.exe
• Windows (ARM64): open-codesign-*-arm64-setup.exe
• Linux (AppImage): open-codesign-*-x64.AppImage
• Linux (Debian/Ubuntu): open-codesign-*-x64.deb
• Linux (Fedora/RHEL): open-codesign-*-x64.rpm

macOS Security Workaround

Installers are not yet notarized. On macOS Sequoia 15+:

xattr -cr "/Applications/Open CoDesign.app"

Then launch normally. On Windows, click "More info" → "Run anyway" when SmartScreen appears.

Configuration

First Launch Setup

Open CoDesign opens Settings automatically on first run. Choose one of three provider paths:

1. ChatGPT Subscription (No API Key)

For ChatGPT Plus/Pro/Team subscribers using Codex models:

1. Click "Sign in with ChatGPT"
2. Authenticate via browser
3. Select Codex models from the dropdown

2. API Key Provider

Set up any supported provider with an API key:

// Supported providers in TypeScript config format
interface ProviderConfig {
  type: 'anthropic' | 'openai' | 'google' | 'openrouter' | 
        'deepseek' | 'kimi' | 'glm' | 'siliconflow' | 
        'openai-compatible';
  apiKey: string;
  baseURL?: string; // For OpenAI-compatible endpoints
  model?: string;
}

Environment variable pattern:

# Anthropic
export ANTHROPIC_API_KEY=sk-ant-...

# OpenAI
export OPENAI_API_KEY=sk-...

# Google Gemini
export GOOGLE_API_KEY=...

# OpenRouter
export OPENROUTER_API_KEY=...

# DeepSeek
export DEEPSEEK_API_KEY=...

In-app configuration:

1. Open Settings (gear icon or Cmd+, / Ctrl+,)
2. Navigate to Providers tab
3. Click Add Provider
4. Select provider type
5. Paste API key from environment variable
6. (Optional) Set base URL for custom endpoints
7. Click Save

3. Local/Keyless (Ollama)

For local models without API keys:

# Install Ollama
curl -fsSL https://ollama.com/install.sh | sh

# Pull a model (e.g., llama3.1)
ollama pull llama3.1

# Ollama runs on http://localhost:11434 by default

In Open CoDesign:

1. Settings → Providers → Add Provider
2. Select OpenAI-compatible
3. Base URL: http://localhost:11434/v1
4. Leave API key empty
5. Model name: llama3.1 (or your pulled model)

One-Click Import

Import existing configurations:

• Claude Code config: Settings → Import → Browse to ~/.claude/config.json
• Codex API config: Settings → Import → CLIProxyAPI auto-detect

Core Workflows

Generate a Design from Scratch

Basic prompt pattern:

// The agent interprets natural language prompts
const prompt = `
Create a landing page for a SaaS product called "TaskFlow" 
with a hero section, feature cards, pricing table, and footer. 
Use a blue and white color scheme.
`;

In the app:

1. Open Open CoDesign
2. Click New Design (or Cmd+N / Ctrl+N)
3. Enter prompt in left panel
4. Select model from dropdown (e.g., claude-3-5-sonnet-20241022)
5. Click Generate or press Enter
6. Watch agent panel for live progress (todos, tool calls)

Expected output: Full HTML artifact with CSS, interactive elements, hover states

Iterate with Comment Mode

Target specific regions without rewriting entire prompt:

// Comment mode workflow
1. Click "Comment" button in toolbar (or `C` key)
2. Click element in preview pane
3. Drop pin with feedback: "Make this heading larger and bold"
4. Agent rewrites only that region

Use cases:

• Adjust typography: "Increase line height in this paragraph"
• Refine colors: "Make this button background darker"
• Add elements: "Insert a contact form below this section"

Use AI-Generated Tweaks

The model emits a tweaks panel with adjustable parameters:

// Example tweaks JSON structure (auto-generated)
{
  "primaryColor": { type: "color", value: "#3B82F6" },
  "headingSize": { type: "range", value: 32, min: 16, max: 64 },
  "spacing": { type: "range", value: 16, min: 8, max: 48 }
}

In the app:

1. Generate a design
2. Open Tweaks panel (right sidebar)
3. Adjust sliders, color pickers, or dropdowns
4. Preview updates live
5. Click Apply to commit changes

Export Artifacts

Export formats:

• HTML: Single-file with embedded CSS/JS
• PDF: Print-ready document
• PPTX: PowerPoint presentation
• ZIP: Multi-file project archive
• Markdown: Source code with annotations

// Programmatic export pattern (desktop app API)
// Available in Electron main process

import { exportArtifact } from './export';

await exportArtifact({
  sessionId: 'abc123',
  format: 'html', // 'pdf' | 'pptx' | 'zip' | 'markdown'
  outputPath: './exports/my-design.html'
});

In the app:

1. Open a completed design
2. Click Export button (top-right)
3. Select format
4. Choose save location
5. Optionally include version history

Work with Design Systems

Use DESIGN.md files to enforce consistent styling:

<!-- DESIGN.md in your workspace -->
# TaskFlow Design System

## Colors
- Primary: #3B82F6
- Secondary: #10B981
- Neutral: #6B7280

## Typography
- Heading: Inter, 32px, bold
- Body: Inter, 16px, regular

## Spacing
- Base unit: 8px
- Section padding: 64px vertical

## Components
- Button: 12px padding, 4px border-radius, primary background

How to use:

1. Create DESIGN.md in workspace directory (Settings → Workspace → Set Path)
2. In prompt, reference: "Follow the design system in DESIGN.md"
3. Agent reads file via permissioned local tools

Version History

All iterations are saved locally:

// Session directory structure
~/.open-codesign/sessions/
  abc123/
    design-v1.html
    design-v2.html
    design-v3.html
    metadata.json
    chat-history.json

In the app:

1. Open Your Designs hub (Cmd+Shift+D / Ctrl+Shift+D)
2. Select a design
3. Click Versions in right sidebar
4. Preview past iterations
5. Restore or fork from any version

Multi-Model Configuration

Switch Models Mid-Session

// Model selection pattern
1. Start design with claude-3-5-sonnet-20241022
2. Click model dropdown in top bar
3. Switch to gpt-4o for next iteration
4. Conversation context carries over

Recommended models by use case:

• Prototypes: claude-3-5-sonnet-20241022 (best design sense)
• Slides: gpt-4o (structured layouts)
• Code-heavy: deepseek-chat (technical accuracy)
• Local/offline: llama3.1 via Ollama (privacy)

Configure Multiple Providers

// Example: Use Claude for design, GPT for copy, Ollama for experiments

// In Settings → Providers, add:
[
  {
    name: "Anthropic",
    type: "anthropic",
    apiKey: process.env.ANTHROPIC_API_KEY,
    models: ["claude-3-5-sonnet-20241022"]
  },
  {
    name: "OpenAI",
    type: "openai",
    apiKey: process.env.OPENAI_API_KEY,
    models: ["gpt-4o", "gpt-4o-mini"]
  },
  {
    name: "Ollama Local",
    type: "openai-compatible",
    baseURL: "http://localhost:11434/v1",
    models: ["llama3.1", "codellama"]
  }
]

TypeScript Integration Patterns

Extend with Custom Tools

Open CoDesign uses permissioned local tools in workspace mode:

// Example custom tool definition
// Place in workspace/.open-codesign/tools/

import { Tool } from '@open-codesign/types';

export const fetchDataTool: Tool = {
  name: 'fetch_marketing_data',
  description: 'Fetch product metrics from local JSON file',
  parameters: {
    type: 'object',
    properties: {
      filePath: { type: 'string' }
    },
    required: ['filePath']
  },
  handler: async ({ filePath }) => {
    // Permission check happens in main process
    const data = await fs.readFile(filePath, 'utf-8');
    return JSON.parse(data);
  }
};

React Component Generation

Prompts targeting React components:

const reactPrompt = `
Create a reusable TaskCard component in React + TypeScript.
Props: title (string), description (string), status (enum: pending | done).
Use Tailwind CSS for styling.
`;

// Expected output structure
/*
interface TaskCardProps {
  title: string;
  description: string;
  status: 'pending' | 'done';
}

export const TaskCard: React.FC<TaskCardProps> = ({ 
  title, 
  description, 
  status 
}) => {
  return (
    <div className="p-4 bg-white rounded-lg shadow">
      <h3 className="text-lg font-bold">{title}</h3>
      <p className="text-gray-600">{description}</p>
      <span className={status === 'done' ? 'text-green-500' : 'text-yellow-500'}>
        {status}
      </span>
    </div>
  );
};
*/

Common Patterns

Prompt Engineering for Designs

Effective prompt structure:

const goodPrompt = `
[Type]: Landing page
[Purpose]: SaaS product launch
[Sections]: Hero with CTA, 3 feature cards, pricing table, footer
[Style]: Modern, minimal, blue/white palette
[Technical]: Responsive, mobile-first, use CSS Grid
[Extras]: Include hover effects on cards
`;

// ❌ Avoid vague prompts:
const badPrompt = "Make a nice website";

Iteration tips:

• Start broad, refine with comments
• Reference existing designs: "Like Stripe's homepage but for education"
• Specify frameworks: "Use Tailwind utilities, avoid custom CSS"

Slide Deck Generation

const slideDeckPrompt = `
Create a 5-slide pitch deck for TaskFlow:
1. Title slide with logo placeholder
2. Problem statement with bullet points
3. Solution overview with 3 features
4. Market opportunity (include a bar chart placeholder)
5. Call to action with contact info

Use a professional blue gradient background.
Export as PPTX.
`;

PDF Report Generation

const pdfPrompt = `
Generate a quarterly business review report:
- Cover page with Q1 2026 title
- Executive summary (1 page)
- Key metrics table (revenue, users, churn)
- 3 charts: line graph (revenue), pie chart (user segments), bar chart (MRR)
- Conclusion with 3 action items

Use corporate colors: #1E40AF (blue), #064E3B (green).
Export as PDF with page numbers.
`;

Local-First Workflow

// Set workspace to enable file-backed sessions
// Settings → Workspace → Set Path: ~/projects/my-designs

// Now designs auto-save to:
~/projects/my-designs/.open-codesign/
  sessions/
  cache/
  exports/

// Commit to git:
cd ~/projects/my-designs
git add .open-codesign/sessions/
git commit -m "Save design iterations"

Troubleshooting

Provider Connection Issues

Symptom: "Failed to connect to provider" error

Solutions:

// 1. Verify API key format
// Anthropic: sk-ant-api03-...
// OpenAI: sk-proj-... or sk-...
// Check for trailing spaces/newlines

// 2. Test connectivity
curl https://api.anthropic.com/v1/messages \
  -H "x-api-key: $ANTHROPIC_API_KEY" \
  -H "anthropic-version: 2023-06-01" \
  -H "content-type: application/json" \
  -d '{"model":"claude-3-5-sonnet-20241022","max_tokens":10,"messages":[{"role":"user","content":"Hi"}]}'

// 3. Check firewall/proxy settings
// Open CoDesign respects HTTP_PROXY and HTTPS_PROXY env vars

// 4. Enable diagnostics
// Settings → Advanced → Enable Provider Diagnostics
// Check logs in Help → Open Logs Folder

Gemini Model Not Found

Symptom: Error with gemini-* models

Fix: Prefix with models/:

// ❌ Incorrect
model: "gemini-1.5-pro"

// ✅ Correct
model: "models/gemini-1.5-pro"

OpenAI-Compatible Relay Issues

Symptom: "Instructions required" error with third-party relays

Cause: Some relays incorrectly enforce system messages

Workaround:

// Settings → Providers → [Your Relay] → Advanced
{
  "forceSystemMessage": true,
  "defaultInstructions": "You are a helpful assistant."
}

macOS Sequoia Gatekeeper Block

Symptom: Cannot open app, "Open Anyway" fails

# Remove quarantine attribute
xattr -cr "/Applications/Open CoDesign.app"

# Verify removal
xattr -l "/Applications/Open CoDesign.app"
# Should show no com.apple.quarantine

Electron IPC Errors

Symptom: "IPC handler not found" in console

Solution:

# Clear cache and restart
# macOS/Linux:
rm -rf ~/.open-codesign/cache

# Windows:
rmdir /s %APPDATA%\open-codesign\cache

# Restart app

Export Failures

Symptom: PDF/PPTX export hangs or produces empty file

Debug steps:

// 1. Check disk space (exports need temp space)
df -h  # macOS/Linux
wmic logicaldisk get size,freespace,caption  # Windows

// 2. Verify Chromium renderer (for PDF)
// Help → Open DevTools → Console
// Look for Chromium print errors

// 3. Try HTML export first (always works)
// Then convert HTML → PDF externally if needed

// 4. Check export logs
// macOS: ~/Library/Logs/open-codesign/export.log
// Windows: %APPDATA%\open-codesign\logs\export.log
// Linux: ~/.config/open-codesign/logs/export.log

ChatGPT Subscription Sign-In Fails

Symptom: OAuth redirect loop or "Session expired"

Fix:

// 1. Clear OAuth cache
// Settings → Advanced → Clear OAuth Cache

// 2. Ensure browser cookies for chat.openai.com are enabled

// 3. Try incognito/private window for OAuth flow

// 4. Verify subscription is active at https://chat.openai.com

Advanced Configuration

Custom Model Definitions

Add unsupported models via config file:

// ~/.open-codesign/config.json
{
  "customModels": [
    {
      "id": "my-custom-model",
      "provider": "openai-compatible",
      "baseURL": "https://my-llm-api.com/v1",
      "apiKey": "ENV:MY_LLM_KEY",
      "contextWindow": 128000,
      "maxOutput": 4096
    }
  ]
}

Workspace Permissions

Control what the agent can access:

// workspace/.open-codesign/permissions.json
{
  "allowedPaths": [
    "./design-system",
    "./assets",
    "./data"
  ],
  "deniedPaths": [
    "./secrets",
    "./.env"
  ],
  "allowNetworkAccess": false,
  "allowedTools": [
    "read_file",
    "search_files",
    "list_directory"
  ]
}

Keyboard Shortcuts

• New Design: Cmd+N / Ctrl+N
• Save: Cmd+S / Ctrl+S (auto-saves enabled by default)
• Export: Cmd+E / Ctrl+E
• Comment Mode: C
• Tweaks Panel: T
• Your Designs Hub: Cmd+Shift+D / Ctrl+Shift+D
• Settings: Cmd+, / Ctrl+,
• DevTools: Cmd+Opt+I / Ctrl+Shift+I

Security Best Practices

1. Never commit API keys: Use environment variables

   # .env (add to .gitignore)
   ANTHROPIC_API_KEY=sk-ant-...
   OPENAI_API_KEY=sk-...
   

2. Verify downloads: Check SHA256SUMS.txt from releases

   shasum -a 256 -c SHA256SUMS.txt
   

3. Workspace isolation: Keep sensitive files outside workspace paths

4. Review tool calls: Agent panel shows every file access

5. Update regularly: Security patches ship with minor versions

Resources

• Documentation: https://opencoworkai.github.io/open-codesign/
• GitHub: https://github.com/OpenCoworkAI/open-codesign
• Releases: https://github.com/OpenCoworkAI/open-codesign/releases
• Discussions: https://github.com/OpenCoworkAI/open-codesign/discussions
• Issues: https://github.com/OpenCoworkAI/open-codesign/issues
• Contributing: https://github.com/OpenCoworkAI/open-codesign/blob/main/CONTRIBUTING.md
• Security: https://github.com/OpenCoworkAI/open-codesign/blob/main/SECURITY.md