Add and update name convention

docs/CODE_OF_CONDUCT.md

@@ -27,6 +27,9 @@ Coding standards and development practices for the Skelly project. These guideli
 ## GDScript Coding Standards
 
 ### Naming Conventions
+
+> 📋 **Quick Reference**: For complete naming convention details, see the **[Naming Convention Quick Reference](#naming-convention-quick-reference)** section below.
+
 ```gdscript
 # Variables and functions: snake_case
 var player_health: int = 100
@@ -39,6 +42,11 @@ const TILE_SPACING := 54
 # Classes: PascalCase
 class_name PlayerController
 
+# Scene files (.tscn) and Script files (.gd): PascalCase
+# MainMenu.tscn, MainMenu.gd
+# Match3Gameplay.tscn, Match3Gameplay.gd
+# TestAudioManager.gd (test files)
+
 # Signals: past_tense
 signal health_changed
 signal game_started
@@ -100,7 +108,7 @@ func _get_match_line(start: Vector2i, dir: Vector2i) -> Array:
 GameManager.start_match3_game()
 
 # ❌ Wrong
-get_tree().change_scene_to_file("res://scenes/game.tscn")
+get_tree().change_scene_to_file("res://scenes/game/Game.tscn")
 ```
 
 ### Autoload Usage
@@ -263,6 +271,207 @@ wip
 - Verify debug state persists across scene changes
 - Check debug code doesn't affect release builds
 
+## Naming Convention Quick Reference
+
+> 🎯 **Single Source of Truth**: This section contains all naming conventions for the Skelly project. All other documentation files reference this section to avoid duplication and ensure consistency.
+
+### 1. GDScript Code Elements
+
+```gdscript
+# Variables and functions: snake_case
+var player_health: int = 100
+func calculate_damage() -> int:
+
+# Constants: SCREAMING_SNAKE_CASE
+const MAX_HEALTH := 100
+const TILE_SPACING := 54
+
+# Classes: PascalCase
+class_name PlayerController
+
+# Signals: past_tense_with_underscores
+signal health_changed
+signal game_started
+signal match_found
+
+# Private functions: prefix with underscore
+func _ready():
+func _initialize_grid():
+```
+
+### 2. File Naming Standards
+
+#### Script and Scene Files
+```gdscript
+# ✅ Correct: All .gd and .tscn files use PascalCase
+MainMenu.tscn / MainMenu.gd
+Match3Gameplay.tscn / Match3Gameplay.gd
+ClickomaniaGameplay.tscn / ClickomaniaGameplay.gd
+ValueStepper.tscn / ValueStepper.gd
+
+# Test files: PascalCase with "Test" prefix
+TestAudioManager.gd
+TestGameManager.gd
+TestMatch3Gameplay.gd
+
+# ❌ Wrong: Old snake_case style (being migrated)
+main_menu.tscn / main_menu.gd
+TestAudioManager.gd
+```
+
+**Rules:**
+- Scene files (.tscn) must match their script file name exactly
+- All new files must use PascalCase
+- Test files use "Test" prefix + PascalCase
+- Autoload scripts follow PascalCase (GameManager.gd, AudioManager.gd)
+
+### 3. Directory Naming Conventions
+
+#### Source Code Directories
+```
+# Source directories: snake_case
+src/autoloads/
+scenes/game/gameplays/
+scenes/ui/components/
+tests/helpers/
+
+# Root directories: lowercase
+docs/
+tests/
+tools/
+data/
+```
+
+#### Asset Directories
+```
+# Asset directories: kebab-case
+assets/audio-files/
+assets/ui-sprites/
+assets/game-textures/
+assets/fonts/
+localization/
+```
+
+### 4. Resource and Configuration Files
+
+```bash
+# Configuration files: lowercase with dots
+project.godot
+gdlintrc
+.gdformatrc
+.editorconfig
+export_presets.cfg
+
+# Godot resource files (.tres): PascalCase
+data/DefaultBusLayout.tres
+data/PlayerSaveData.tres
+scenes/ui/DefaultTheme.tres
+
+# Asset metadata: kebab-case
+assets/asset-sources.yaml
+assets/audio-files/audio-sources.yaml
+assets/ui-sprites/sprite-sources.yaml
+
+# Development files: kebab-case
+requirements.txt
+development-tools.md
+```
+
+### 5. Asset File Naming
+
+```bash
+# Audio files: kebab-case in kebab-case directories
+assets/audio-files/background-music.ogg
+assets/audio-files/ui-sounds/button-click.wav
+assets/audio-files/game-sounds/match-sound.wav
+
+# Visual assets: kebab-case
+assets/ui-sprites/main-menu-background.png
+assets/game-textures/gem-blue.png
+assets/fonts/main-ui-font.ttf
+
+# Import settings: match the original file
+background-music.ogg.import
+button-click.wav.import
+```
+
+**Asset Rules:**
+- All asset files use kebab-case
+- Organized in kebab-case directories
+- Import files automatically match asset names
+- Document all assets in `asset-sources.yaml`
+
+### 6. Git Workflow Conventions
+
+#### Branch Naming
+```bash
+# Feature branches: feature/description-with-hyphens
+feature/new-gameplay-mode
+feature/settings-ui-improvement
+feature/audio-system-upgrade
+
+# Bug fixes: fix/description-with-hyphens
+fix/tile-positioning-bug
+fix/save-data-corruption
+fix/debug-menu-visibility
+
+# Refactoring: refactor/component-name
+refactor/match3-input-system
+refactor/autoload-structure
+
+# Documentation: docs/section-name
+docs/code-of-conduct-update
+docs/api-documentation
+```
+
+#### Commit Message Format
+```bash
+# Format: <type>: <description>
+# Examples:
+feat: add dark mode toggle to settings menu
+fix: resolve tile swap animation timing issue
+docs: update naming conventions in code of conduct
+refactor: migrate print statements to DebugManager
+test: add comprehensive match3 validation tests
+```
+
+### 7. Quick Reference Summary
+
+| File Type | Convention | Example |
+|-----------|------------|---------|
+| **GDScript Files** | PascalCase | `MainMenu.gd`, `AudioManager.gd` |
+| **Scene Files** | PascalCase | `MainMenu.tscn`, `Match3Gameplay.tscn` |
+| **Test Files** | Test + PascalCase | `TestAudioManager.gd` |
+| **Variables/Functions** | snake_case | `player_health`, `calculate_damage()` |
+| **Constants** | SCREAMING_SNAKE_CASE | `MAX_HEALTH`, `TILE_SPACING` |
+| **Classes** | PascalCase | `class_name PlayerController` |
+| **Signals** | past_tense | `health_changed`, `game_started` |
+| **Directories** | snake_case (src) / kebab-case (assets) | `src/autoloads/`, `assets/audio-files/` |
+| **Assets** | kebab-case | `background-music.ogg`, `gem-blue.png` |
+| **Config Files** | lowercase.extension | `project.godot`, `.gdformatrc` |
+| **Branches** | type/kebab-case | `feature/new-gameplay`, `fix/tile-bug` |
+
+> ✅ **Status**: All major file naming inconsistencies have been resolved. The project now follows consistent PascalCase naming for all .gd and .tscn files.
+
+### 8. File Renaming Migration Guide
+
+When renaming files to follow conventions:
+
+**Step-by-step procedure:**
+1. **Use Git rename**: `git mv old_file.gd NewFile.gd` (preserves history)
+2. **Update .tscn references**: Modify script path in scene files
+3. **Update code references**: Search and replace all `preload()` and `load()` statements
+4. **Update project.godot**: If file is referenced in autoloads or project settings
+5. **Update documentation**: Search all .md files for old references
+6. **Update test files**: Modify any test files that reference the renamed file
+7. **Run validation**: Execute `gdlint`, `gdformat`, and project tests
+8. **Verify in editor**: Load scenes in Godot editor to confirm everything works
+
+**Tools for validation:**
+- `python tools/run_development.py --test` - Run all tests
+- `python tools/run_development.py --lint` - Check code quality
+- `python tools/run_development.py --format` - Ensure consistent formatting
+
 ## Common Mistakes to Avoid
 
 ### Architecture Violations
@@ -271,7 +480,7 @@ wip
 get_tree().change_scene_to_file("some_scene.tscn")
 
 # Don't hardcode paths
-var tile = load("res://scenes/game/gameplays/tile.tscn")
+var tile = load("res://scenes/game/gameplays/Tile.tscn")
 
 # Don't ignore null checks
 var node = get_node("SomeNode")