# 🔒 CODE FREEZE NOTICE

## Date: March 29, 2026
## Duration: Core Separation Refactor

### Reason
Implementing Command Pattern and Observer Pattern to decouple UI and logic interfaces.

### Scope
This refactor will:
1. Extract TUI code from `core` module into standalone UI module
2. Implement Command Pattern for all user interactions
3. Implement Observer Pattern for state change notifications
4. Make `core` completely UI-agnostic
5. Enable multiple simultaneous UIs (TUI + future ScalaFX GUI)

### Module Structure (Target)
```
modules/
  core/        # Pure game logic, Command, Observer traits, CommandInvoker
  api/         # Data models (unchanged)
  ui/          # TUI and GUI implementations (both depend only on core)
```

### Expected Impact
- All regression tests must pass
- Build must succeed with new module structure
- Core contains zero UI references
- TUI and potential GUI can run independently or simultaneously

### Blocked Changes
Do not:
- Add new features to `core`
- Modify `core` API before Message & Observer traits are implemented
- Create direct dependencies between UI modules
- Add UI code to `core`

Keep developing in separate branches until refactor is complete.

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Status: **IN PROGRESS** ✏️