SimpleChatJS

An Electron desktop AI chat application with MCP (Model Context Protocol) support.

- Frontend:Vanilla JS, HTML, CSS (no frameworks)
- Backend:Node.js + Express
- Desktop:Electron
- Database:SQLite (better-sqlite3)
- MCP:@modelcontextprotocol/sdk

- Multiple persistent chat sessions with SQLite storage
- Real-time streaming responses from AI providers
- Model Context Protocol (MCP) integration for tool execution
- Chat branching and turn-based history
- Multimodal messages (images, documents)
- Debug panels with API request/response inspection
- Settings profiles for different AI providers
- Anthropic thinking mode and Google Gemini thinking support

- Node.js
- An AI API (Ollama, OpenAI, or any OpenAI-compatible endpoint)
- Linux:FUSE (required to run the AppImage)

npm install npx electron-builder install-app-deps npm run build

src/js/ ├── app/ # Core logic (message sending, API calls, settings) ├── chat/ # Chat modes and history management ├── tools/ # MCP server management and tool handling ├── render/ # Message rendering and streaming └── ui/ # Settings, debug panels, context menus backend/ ├── server.js # Express server (runs inside Electron) ├── config/ # Database initialization ├── routes/ # API endpoints ├── services/ # Chat, MCP, settings, tool events └── utils/ # Logging

- Ollama- Local AI models
- OpenAI API- GPT models
- Anthropic- Claude (via proxy or direct)
- Google Gemini- Gemini models
- LM Studio / vLLM- Local inference servers

Pushes tomaintrigger automated builds via GitHub Actions:

- Build job:Runs on Windows, Linux, and macOS in parallel. Produces distributable packages (.zip,.AppImage,.dmg).
- Release job:Triggers only when the version inpackage.jsondiffers from the latest git tag. Creates a draft GitHub Release with all platform builds attached.

- Edit files insrc/js/orbackend/
- Reload the app (Ctrl+R) for frontend changes
- Restart the app for backend changes

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