rcarmo/apfelstrudel

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# 🥧 Apfelstrudel <p align="center"> <img src="docs/icon-256.png" alt="Apfelstrudel icon" width="256" /> </p> ## Summary of Changes (Enhanced Fork) This fork introduces several significant features to the original project: - 📑 **Multi-Tab Support** — Work on multiple musical scripts simultaneously with a tabbed editor interface. - 💾 **Session Persistence** — Automatically saves and reloads all tabs and their content across server restarts. - 🕒 **Undo/Redo System** — Comprehensive history management (up to 100 steps per tab) with automatic backups before AI modifications. - 📂 **Enhanced File Operations** — "Read from file" and "Save to file" with native dialog support and automatic tab renaming. - 🤖 **LM Studio Integration** — Support for local LLMs via LM Studio (API-compatible with OpenAI). - ✏️ **Tab Customization** — Rename tabs via double-click to stay organized. - ↩️ **UX Improvements** — Dedicated Undo/Redo buttons and streamlined workflow. > Live coding music with AI assistance — powered by [Strudel.cc](https://strudel.cc) and [Bun](https://bun.sh) Apfelstrudel combines the expressive power of Strudel's live coding environment with an AI agent that can help you create, modify, and understand music patterns in real time. <p align="center"> <img src="docs/screenshot.png" alt="Apfelstrudel Interface" /> </p> ## Features - 🎵 **Strudel Integration** — Full Strudel.cc live coding environment - 🤖 **AI Assistant** — Chat with an agent that understands music and patterns - 🔄 **Real-time Control** — Agent can edit patterns, control playback, adjust tempo - 🎨 **Dark Theme** — Easy on the eyes for those late-night sessions - ⌨️ **Keyboard Shortcuts** — Ctrl+Enter to play, Ctrl+. to stop ## Quick Start ### Prerequisites - [Bun](https://bun.sh) v1.0 or later - OpenAI API key (or Azure OpenAI credentials) ### Installation ```bash # Clone the repository git clone https://github.com/rcarmo/apfelstrudel.git cd apfelstrudel # Install backend dependencies make install # Vendor frontend dependencies (Preact, HTM, Strudel) make vendor # Copy environment template cp .env.example .env # Edit .env with your API credentials ``` ### Configuration Create a `.env` file with your LLM credentials: ```bash # OpenAI OPENAI_API_KEY=sk-... # Or Azure OpenAI AZURE_OPENAI_ENDPOINT=https://your-resource.openai.azure.com AZURE_OPENAI_KEY=... AZURE_OPENAI_DEPLOYMENT=gpt-4o-mini # Optional settings APFELSTRUDEL_PROVIDER=openai # "azure" or "lmstudio" APFELSTRUDEL_MODEL=gpt-4o-mini APFELSTRUDEL_MAX_STEPS=16 PORT=3000 # For LMStudio # APFELSTRUDEL_PROVIDER=lmstudio # APFELSTRUDEL_MODEL=your-local-model-name # APFELSTRUDEL_LMSTUDIO_HOST=http://localhost:1234/v1 ``` ### Running ```bash # Development mode with hot reload make dev # Production mode make start ``` Open http://localhost:3000 in your browser. ## Usage ### Pattern Editor (Left Panel) Write Strudel patterns using mini-notation: ```javascript // Basic drum pattern s("bd sd:2 bd bd sd").bank("RolandTR808") // Melodic pattern note("c3 e3 g3 b3".fast(2)).sound("sawtooth") .lpf(800).lpq(5) // Stacked patterns stack( s("bd*4"), s("~ hh*2"), note("c2 g2".slow(2)).sound("sawtooth") ) ``` ### AI Assistant (Right Panel) Ask the assistant to help you: - "Make a chill lo-fi beat" - "Add some hi-hats to the pattern" - "Make it faster" - "Explain what this pattern does" - "What samples are available?" ### Keyboard Shortcuts | Shortcut | Action | |----------|--------| | `Ctrl+Enter` | Play pattern | | `Ctrl+.` | Stop | | `Enter` | Send chat message | | `Shift+Enter` | New line in chat | ## Development ```bash # Run all checks (lint + typecheck + test) make check # Individual commands make lint # Run biome linter make format # Format code make typecheck # TypeScript type checking make test # Run tests # Build for production make build # Clean build artifacts make clean ``` ## Project Structure ``` apfelstrudel/ ├── src/ │ ├── server/ # Bun HTTP + WebSocket server │ │ ├── index.ts # Main server entry │ │ └── websocket.ts # WebSocket handlers │ ├── agent/ # LLM agent implementation │ │ ├── runner.ts # Agentic loop │ │ ├── llm.ts # LLM client (OpenAI/Azure) │ │ └── system-prompt.ts │ ├── tools/ # Agent tools │ │ ├── pattern.ts # get/set/modify pattern │ │ ├── transport.ts # play/stop/evaluate │ │ ├── tempo.ts # tempo control │ │ ├── reference.ts # strudel help & samples │ │ └── todo.ts # task management │ └── shared/ # Shared types │ └── types.ts ├── public/ # Static frontend │ ├── index.html │ ├── styles.css │ └── app.js ├── SPEC.md # Detailed specification ├── Makefile └── package.json ``` ## Agent Tools The AI assistant has access to these tools: | Tool | Description | |------|-------------| | `get_pattern` | Read current pattern code | | `set_pattern` | Replace pattern code | | `modify_pattern` | Insert code before/after existing pattern | | `play_music` | Start playback | | `stop_music` | Stop playback | | `strudel_evaluate` | Evaluate code without changing editor | | `set_tempo` | Adjust BPM | | `get_strudel_help` | Query Strudel documentation | | `list_samples` | List available samples | | `manage_todo` | Track tasks and ideas | ## Architecture ``` ┌──────────────────────────────────────────────────────────┐ │ Browser │ │ ┌─────────────────────┐ ┌────────────────────────────┐ │ │ │ Strudel Editor │ │ Chat Sidebar │ │ │ │ (CodeMirror) │ │ (WebSocket messages) │ │ │ └─────────────────────┘ └────────────────────────────┘ │ │ │ │ │ └─────────────┼────────────────────────┼────────────────────┘ │ WebSocket │ ▼ ▼ ┌──────────────────────────────────────────────────────────┐ │ Bun Server │ │ ┌─────────────────────┐ ┌────────────────────────────┐ │ │ │ Static Files │ │ WebSocket Handler │ │ │ └─────────────────────┘ └────────────────────────────┘ │ │ │ │ │ ▼ │ │ ┌────────────────────────────┐ │ │ │ Agent Runner │ │ │ │ (Agentic Loop + Tools) │ │ │ └────────────────────────────┘ │ │ │ │ └──────────────────────────────────────┼────────────────────┘ │ ▼ ┌────────────────┐ │ OpenAI / Azure │ │ LLM API │ └────────────────┘ ``` ## Vendored Samples Audio samples from the [Dirt-Samples](https://github.com/tidalcycles/Dirt-Samples) library (218 instruments, ~2000 files) are vendored in `public/vendor/strudel/samples/dirt/` for offline convenience. These samples were created by the [TidalCycles](https://tidalcycles.org) community and are redistributed here temporarily to enable fully offline operation. Fonts ([Inter](https://rsms.me/inter/) by Rasmus Andersson, [JetBrains Mono](https://www.jetbrains.com/lp/mono/) by JetBrains) are also vendored locally in `public/vendor/fonts/`. If you are packaging or forking this project, please review the upstream licenses for these assets. ## License AGPL-3.0 — Required by Strudel.cc dependency. See [LICENSE](LICENSE) for details. ## Credits - [Strudel.cc](https://strudel.cc) by Felix Roos — The amazing live coding environment - [Dirt-Samples](https://github.com/tidalcycles/Dirt-Samples) by the TidalCycles community — Audio samples - [Inter](https://rsms.me/inter/) by Rasmus Andersson — UI typeface - [JetBrains Mono](https://www.jetbrains.com/lp/mono/) by JetBrains — Editor typeface - [Bun](https://bun.sh) — Fast JavaScript runtime - Inspired by [rcarmo/steward](https://github.com/rcarmo/steward) — Tool harness pattern --- Made with 🥧 and 🎵

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