chore: import upstream snapshot with attribution

python/state-test/README.md

@@ -0,0 +1,41 @@
+# State Management Test
+
+This is a test project for the `assistant-stream` state management functionality. It demonstrates various state operations and updates over time.
+
+## Features
+
+- **Simple State Test**: Basic state updates with primitive values
+- **Complex Test**: Nested state updates with objects and arrays
+- **String Operations**: String concatenation and method testing
+- **List Operations**: List manipulation with append, extend, and other operations
+- **Dictionary Operations**: Dictionary manipulation with various methods
+
+## Setup
+
+1. Install the requirements:
+
+   ```
+   pip install -r requirements.txt
+   ```
+
+2. Run the server:
+
+   ```
+   python server.py
+   ```
+
+3. Open your browser to [http://localhost:8000](http://localhost:8000)
+
+4. Click on the different test buttons to see state updates in action
+
+## Implementation Details
+
+This test server demonstrates the following state management features:
+
+- Primitive values (strings, numbers, booleans)
+- Nested state objects
+- String operations (concatenation, methods)
+- List operations (append, extend, indexing)
+- Dictionary operations (get, setdefault, keys/values)
+
+Each test endpoint updates state over time with various operations to showcase the functionality of the `StateProxy` and `StateManager` classes.