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# Ritz Framework
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A WebAssembly UI framework with Python-like syntax that compiles to high-performance WASM while remaining executable in Python for debugging.
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## Core Innovations
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### 1. Python's AST Module for Parsing
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No need for a custom parser! Since our components are valid Python, we use Python's own `ast` module to parse them. Zero parsing overhead, perfect compatibility, error messages for free.
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### 2. Debug Python in WASM (Not JavaScript!)
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Set breakpoints in Python source code, step through Python lines, inspect Python variables - all in the browser! We compile with DWARF debug symbols and source maps that map WASM → Python source.
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### 3. Progressive Module Loading
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Split apps into multiple WASM modules:
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- `bootstrap.wasm` (50KB) - Login only, no business logic
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- `app-core.wasm` (200KB) - Main app, requires auth
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- Feature modules - Lazy loaded on demand
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- Security: Unauthenticated users never receive app code!
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### 4. Python Executable, WASM Compilable
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Write components in **actual Python** that can run in CPython for debugging, but compile to WebAssembly for production with:
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- No virtual DOM overhead
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- Direct signal-to-DOM updates
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- 99% fewer mutations than React
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- Sub-200KB bundle sizes
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## Quick Start
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### Try the Python Prototype
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```bash
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# Run the example
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python3 example.py
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# Run tests
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python3 test.py
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```
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### Component Syntax
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```python
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@component
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def Counter():
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count = signal(0)
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def increment():
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count += 1
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with Div(class_='counter'):
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yield H1('Counter App')
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yield P(f'Count: {count}')
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yield Button('Click me', onclick=increment)
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```
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### Key Features
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1. **Yield-based composition** - Natural Python generators for building component trees
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2. **Context managers** - Use `with` statements for nested structures
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3. **Reactive signals** - Fine-grained reactivity without virtual DOM
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4. **Mixed content** - Yield strings, components, or elements seamlessly
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## Files
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- `RESEARCH.md` - Complete technical architecture and implementation plan
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- `framework.py` - Python prototype implementation
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- `example.py` - Example components demonstrating the syntax
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- `test.py` - Simple test file
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- `ast_parser.py` - Parse components using Python's ast module!
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- `debug_concept.py` - Revolutionary Python-in-WASM debugging
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- `module_system.py` - Progressive loading & security architecture
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- `compiler.py` - Complete compilation pipeline concept
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## Architecture
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The framework works in two modes:
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1. **Debug Mode** (Current): Runs in Python interpreter, generates HTML/IR
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2. **Production Mode** (TODO): Compiles to WebAssembly with LLVM
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### Compilation Pipeline
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```
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Python-like syntax → Parser (AST) → LLVM IR → WebAssembly → Browser
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```
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### Reactive Runtime
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- Signals store values + subscriber lists in WASM memory
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- Effects track dependencies automatically
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- Direct signal-to-DOM-node mapping (no diffing)
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- Batched DOM operations across WASM/JS bridge
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## Next Steps
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1. ✅ Python prototype with working components
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2. ⬜ Parser for Python subset (yields, functions, decorators)
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3. ⬜ LLVM backend for WASM generation
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4. ⬜ Reactive runtime in C/Rust
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5. ⬜ DOM operation batching and JS bridge
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6. ⬜ Benchmarks against React/SolidJS
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## Performance Targets
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Based on SolidJS and Leptos research:
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- Bundle size: < 200KB compressed
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- Startup time: < 500ms on slow 3G
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- Update performance: Within 10% of vanilla JS
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- Memory usage: 70% less than React
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## Why This Approach?
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1. **Developer happiness** - Write Python, debug Python, ship WASM
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2. **Performance** - Compile-time optimization, no virtual DOM
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3. **Simplicity** - Yield syntax is intuitive and composable
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4. **Type safety** - Static typing at compile time
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Start with `example.py` to see the syntax in action!
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