# Specification Results

## Project Overview
- [ ] Develop "Nanocore", a small dispatch message core designed for asynchronous running in a single thread.
- [ ] **Goal**: Enable efficient message dispatching and handling using an event loop (e.g., Python's asyncio).
- [ ] **Lifecycle**: Support Planning, Development, Testing, and Deployment phases.

## Architecture
### Core System
- [ ] Implement a **Worker** class for processing messages.
    - [ ] Run an event loop to process messages asynchronously from a queue.
    - [ ] Use instance methods as handler functions.
    - [ ] Implement fast, memory-efficient queues (list-like).
    - [ ] Wait for signals from the Broker to start processing.
- [ ] Implement a **Broker** class for message dispatching.
    - [ ] Register multiple Workers.
    - [ ] Dispatch messages to appropriate Workers based on patterns/types.
    - [ ] Support dispatch strategies:
        - [ ] Broadcast to all workers in a group.
        - [ ] Round-robin to a single worker in a group.
        - [ ] Direct dispatch to a specific worker.
    - [ ] Raise signals to notify Workers of new messages.

### Client-Server Model
- [ ] **Server**: Based on FastAPI.
- [ ] **Client**: Terminal User Interface (TUI).
- [ ] **Communication**: WebSocket protocol.
- [ ] **Connection Management**:
    - [ ] CLI command `connect` to establish connection.
    - [ ] CLI command `disconnect` to close connection.
- [ ] **Heartbeat Mechanism**:
    - [ ] Server sends heartbeat every 5 seconds.
    - [ ] Client sends heartbeat every 5 seconds.
    - [ ] Disconnect if no heartbeat received within 10 seconds (both sides).

## Workspace & Configuration
- [ ] **Workspace Isolation**: System must use a folder as a "workspace" to allow multiple independent component instances on the same machine.
- [ ] **Configuration**: Merge environment variables from `.env` and `.env.example`.

## Technological Stack
- [ ] **Core Logic**: Python `asyncio`.
- [ ] **Web Server**: FastAPI.
- [ ] **Package Management**: `uv` (Python), `cargo` (Rust - potentially for extensions or specific modules).
- [ ] **Containerization**: `docker-compose`.

## Development & Operations
### Tools
- [ ] **Development**: `docker-compose`, `uv`, `cargo`.
- [ ] **Testing**: `cargo test`, `uv test`, `docker-compose test`.
- [ ] **Documentation**: `cargo doc`, `uv doc`, `docker-compose doc`.
- [ ] **Deployment**: `docker-compose up`, `uv deploy`, `cargo deploy`.
- [ ] **CI/CD**: Standardized commands (`ci`, `cd`) for all tools.
- [ ] **Observability**: Monitoring, Logging, Security, Backup, Restore commands.

### Quality Assurance
- [ ] Achieve >90% code coverage.
- [ ] Implement random input testing and fuzzing.
- [ ] Perform statistical analysis via selective/random testing.
- [ ] Enforce 100% execution of existing test cases.
- [ ] Adhere to SQA principles.

## Use Cases / Tests
### Test 01: Basic Broker-Worker Lifecycle
- [ ] Create Broker and Worker.
- [ ] Register Worker in Broker.
- [ ] Start Broker and Worker.
- [ ] Stop Worker and Broker.

### Test 02: RPN Calculator
- [ ] Implement RPN Calculator as a Worker.
- [ ] Register Calculator in Broker.
- [ ] Start System.
- [ ] External process sends arithmetic messages.
- [ ] Calculator processes messages.
- [ ] Stop System.