🔒 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:

Extract TUI code from core module into standalone UI module
Implement Command Pattern for all user interactions
Implement Observer Pattern for state change notifications
Make core completely UI-agnostic
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.

Status: IN PROGRESS ✏️

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