diff --git a/backend/PROJECT_PLAN.json b/backend/PROJECT_PLAN.json
index c5dbd7b..957f842 100644
--- a/backend/PROJECT_PLAN.json
+++ b/backend/PROJECT_PLAN.json
@@ -2,13 +2,13 @@
   "meta": {
     "version": "1.0.0",
     "created": "2026-01-24",
-    "lastUpdated": "2026-01-25",
+    "lastUpdated": "2026-01-26",
     "planType": "feature",
     "projectName": "Mantimon TCG - Backend Game Engine",
     "description": "Core game engine scaffolding for a highly configurable Pokemon TCG-inspired card game. The engine must support campaign mode with fixed rules and free play mode with user-configurable rules.",
     "totalEstimatedHours": 48,
     "totalTasks": 32,
-    "completedTasks": 29
+    "completedTasks": 30
   },
   "categories": {
     "critical": "Foundation components that block all other work",
@@ -23,10 +23,12 @@
     "cardRegistry": "Hybrid - definitions loaded from DB via CardService, embedded in GameState at game creation for self-contained gameplay",
     "cardModels": "Separate CardDefinition (immutable template) from CardInstance (mutable in-game state)",
     "actionModeling": "Union types for type safety",
-    "asyncSupport": "Async throughout for WebSocket compatibility"
+    "asyncSupport": "Async throughout for WebSocket compatibility",
+    "enumsLocation": "Enums in app/core/enums.py (foundational module with zero dependencies) - breaks circular imports and enables clean re-exports"
   },
   "directoryStructure": {
     "core": "backend/app/core/",
+    "enums": "backend/app/core/enums.py",
     "models": "backend/app/core/models/",
     "effects": "backend/app/core/effects/",
     "tests": "backend/tests/core/"
@@ -536,21 +538,22 @@
       "description": "Set up clean public API exports in __init__.py files",
       "category": "medium",
       "priority": 30,
-      "completed": false,
-      "tested": false,
+      "completed": true,
+      "tested": true,
       "dependencies": ["HIGH-009"],
       "files": [
-        {"path": "app/core/__init__.py", "issue": "Needs public API exports"},
-        {"path": "app/core/models/__init__.py", "issue": "Needs model exports"},
-        {"path": "app/core/effects/__init__.py", "issue": "Needs effect exports"}
+        {"path": "app/core/__init__.py", "status": "updated"},
+        {"path": "app/core/models/__init__.py", "status": "updated"},
+        {"path": "app/core/effects/__init__.py", "status": "updated"}
       ],
       "suggestedFix": "Export key classes: GameEngine, RulesConfig, GameState, CardDefinition, CardInstance, Action types, effect_handler decorator",
       "estimatedHours": 0.5,
-      "notes": "Clean API surface for consumers of the core module"
+      "notes": "Clean API surface for consumers of the core module. Exports: 34 items from core, 29 from models, 12 from effects. 14 effect handlers auto-registered.",
+      "completedDate": "2026-01-26"
     },
     {
       "id": "DOCS-001",
-      "name": "Create core module CLAUDE.md",
+      "name": "Create core module AGENTS.md",
       "description": "Document the game engine architecture, patterns, and usage guidelines for AI agents",
       "category": "low",
       "priority": 31,
@@ -558,11 +561,11 @@
       "tested": false,
       "dependencies": ["HIGH-009"],
       "files": [
-        {"path": "app/core/CLAUDE.md", "issue": "File does not exist"}
+        {"path": "app/core/AGENTS.md", "issue": "File does not exist"}
       ],
       "suggestedFix": "Document: module structure, key classes, effect handler pattern, configuration system, testing approach, security considerations (hidden info)",
       "estimatedHours": 1,
-      "notes": "Reference doc as specified in CLAUDE.md"
+      "notes": "Reference doc as specified in AGENTS.md"
     },
     {
       "id": "LOW-001",
@@ -654,7 +657,7 @@
       "estimatedHours": 14,
       "goals": ["GameEngine complete", "Full integration tested", "Documentation complete"],
       "status": "IN_PROGRESS",
-      "progress": "HIGH-008, TEST-012, HIGH-009, TEST-013 complete. 711 tests passing. Remaining: MED-004 (module exports), DOCS-001 (documentation), LOW-001 (docstrings)."
+      "progress": "HIGH-008, TEST-012, HIGH-009, TEST-013, MED-004 complete. Enums moved to app/core/enums.py (architectural improvement to eliminate circular imports). 826 tests passing. Remaining: DOCS-001 (documentation), LOW-001 (docstrings)."
     }
   },
   "testingStrategy": {
diff --git a/backend/app/core/__init__.py b/backend/app/core/__init__.py
index edb3d09..4d609a1 100644
--- a/backend/app/core/__init__.py
+++ b/backend/app/core/__init__.py
@@ -14,4 +14,141 @@ Key Components:
     - win_conditions: Win/loss detection
     - visibility: Hidden information filtering for clients
     - rng: Random number generation with testable seeded implementation
+
+Quick Start:
+    from app.core import GameEngine, RulesConfig, create_rng
+
+    # Create engine with rules and RNG
+    engine = GameEngine(rules=RulesConfig(), rng=create_rng())
+
+    # Create a game
+    game = engine.create_game(
+        player_ids=["player1", "player2"],
+        decks={"player1": deck1, "player2": deck2},
+        card_registry=registry,
+    )
+
+    # Execute actions
+    result = await engine.execute_action(game, "player1", action)
+
+    # Get client-safe view
+    visible = engine.get_visible_state(game, "player1")
 """
+
+# Enums (foundational, no dependencies)
+# Configuration
+from app.core.config import (
+    ActiveConfig,
+    BenchConfig,
+    CombatConfig,
+    DeckConfig,
+    EnergyConfig,
+    EvolutionConfig,
+    FirstTurnConfig,
+    PrizeConfig,
+    RetreatConfig,
+    RulesConfig,
+    StatusConfig,
+    TrainerConfig,
+    WinConditionsConfig,
+)
+
+# Engine
+from app.core.engine import ActionResult, GameEngine
+from app.core.enums import (
+    ActionType,
+    CardType,
+    EnergyType,
+    GameEndReason,
+    ModifierMode,
+    PokemonStage,
+    PokemonVariant,
+    StatusCondition,
+    TrainerType,
+    TurnPhase,
+)
+
+# Game state models (imported after config to avoid circular imports)
+from app.core.models.game_state import (
+    ForcedAction,
+    GameState,
+    PlayerState,
+    Zone,
+)
+
+# RNG
+from app.core.rng import RandomProvider, SecureRandom, SeededRandom, create_rng
+
+# Validation
+from app.core.rules_validator import ValidationResult, validate_action
+
+# Turn management
+from app.core.turn_manager import TurnManager, TurnStartResult
+
+# Visibility (for service layer)
+from app.core.visibility import (
+    VisibleGameState,
+    VisiblePlayerState,
+    VisibleZone,
+    get_spectator_state,
+    get_visible_state,
+)
+
+# Win conditions
+from app.core.win_conditions import WinResult, check_win_conditions
+
+__all__ = [
+    # Enums
+    "ActionType",
+    "CardType",
+    "EnergyType",
+    "GameEndReason",
+    "ModifierMode",
+    "PokemonStage",
+    "PokemonVariant",
+    "StatusCondition",
+    "TrainerType",
+    "TurnPhase",
+    # Configuration
+    "RulesConfig",
+    "DeckConfig",
+    "ActiveConfig",
+    "BenchConfig",
+    "EnergyConfig",
+    "PrizeConfig",
+    "FirstTurnConfig",
+    "WinConditionsConfig",
+    "StatusConfig",
+    "TrainerConfig",
+    "EvolutionConfig",
+    "RetreatConfig",
+    "CombatConfig",
+    # RNG
+    "RandomProvider",
+    "SeededRandom",
+    "SecureRandom",
+    "create_rng",
+    # Engine
+    "GameEngine",
+    "ActionResult",
+    # Validation
+    "ValidationResult",
+    "validate_action",
+    # Win conditions
+    "WinResult",
+    "check_win_conditions",
+    # Turn management
+    "TurnManager",
+    "TurnStartResult",
+    # Visibility
+    "VisibleGameState",
+    "VisiblePlayerState",
+    "VisibleZone",
+    "get_visible_state",
+    "get_spectator_state",
+    # Game state models
+    "ForcedAction",
+    "GameState",
+    "PlayerState",
+    "Zone",
+]
diff --git a/backend/app/core/config.py b/backend/app/core/config.py
index 5b4c69a..70796b8 100644
--- a/backend/app/core/config.py
+++ b/backend/app/core/config.py
@@ -24,7 +24,7 @@ Usage:
 
 from pydantic import BaseModel, Field
 
-from app.core.models.enums import EnergyType, ModifierMode, PokemonVariant
+from app.core.enums import EnergyType, ModifierMode, PokemonVariant
 
 
 class DeckConfig(BaseModel):
diff --git a/backend/app/core/effects/__init__.py b/backend/app/core/effects/__init__.py
index 3945d0b..a52ad1f 100644
--- a/backend/app/core/effects/__init__.py
+++ b/backend/app/core/effects/__init__.py
@@ -8,4 +8,47 @@ Key Components:
     - base: EffectContext and EffectResult types
     - registry: Effect handler registration and lookup
     - handlers: Built-in effect handlers (deal_damage, heal, etc.)
+
+Usage:
+    from app.core.effects import effect_handler, resolve_effect, EffectContext, EffectResult
+
+    @effect_handler("custom_effect")
+    def handle_custom(ctx: EffectContext) -> EffectResult:
+        # Effect implementation
+        return EffectResult.success("Effect applied")
+
+    # Resolve an effect by ID
+    result = resolve_effect("deal_damage", context)
 """
+
+# Import handlers to register them
+from app.core.effects import handlers as _handlers  # noqa: F401
+from app.core.effects.base import EffectContext, EffectResult, EffectType
+from app.core.effects.registry import (
+    EffectHandler,
+    clear_registry,
+    effect_handler,
+    get_handler,
+    is_registered,
+    list_effects,
+    register_handler,
+    resolve_effect,
+    unregister_handler,
+)
+
+__all__ = [
+    # Base types
+    "EffectContext",
+    "EffectResult",
+    "EffectType",
+    # Registry
+    "EffectHandler",
+    "effect_handler",
+    "resolve_effect",
+    "list_effects",
+    "get_handler",
+    "is_registered",
+    "register_handler",
+    "unregister_handler",
+    "clear_registry",
+]
diff --git a/backend/app/core/effects/handlers.py b/backend/app/core/effects/handlers.py
index 74f6b25..5756960 100644
--- a/backend/app/core/effects/handlers.py
+++ b/backend/app/core/effects/handlers.py
@@ -38,7 +38,7 @@ Available Effects:
 
 from app.core.effects.base import EffectContext, EffectResult, EffectType
 from app.core.effects.registry import effect_handler
-from app.core.models.enums import ModifierMode, StatusCondition
+from app.core.enums import ModifierMode, StatusCondition
 
 
 @effect_handler("deal_damage")
diff --git a/backend/app/core/engine.py b/backend/app/core/engine.py
index d698ec6..078e70b 100644
--- a/backend/app/core/engine.py
+++ b/backend/app/core/engine.py
@@ -41,6 +41,7 @@ from typing import Any
 from pydantic import BaseModel, Field
 
 from app.core.config import RulesConfig
+from app.core.enums import GameEndReason, StatusCondition, TurnPhase
 from app.core.models.actions import (
     Action,
     AttachEnergyAction,
@@ -56,7 +57,6 @@ from app.core.models.actions import (
     UseAbilityAction,
 )
 from app.core.models.card import CardDefinition, CardInstance
-from app.core.models.enums import GameEndReason, StatusCondition, TurnPhase
 from app.core.models.game_state import GameState, PlayerState
 from app.core.rng import RandomProvider, create_rng
 from app.core.rules_validator import ValidationResult, validate_action
@@ -623,7 +623,7 @@ class GameEngine:
 
         # Update per-turn counters
         if card_def.trainer_type:
-            from app.core.models.enums import TrainerType
+            from app.core.enums import TrainerType
 
             if card_def.trainer_type == TrainerType.SUPPORTER:
                 player.supporters_played_this_turn += 1
@@ -837,7 +837,7 @@ class GameEngine:
         player.active.add(new_active)
 
         # Clear status conditions (retreat clears confusion)
-        from app.core.models.enums import StatusCondition
+        from app.core.enums import StatusCondition
 
         active.remove_status(StatusCondition.CONFUSED)
 
diff --git a/backend/app/core/models/enums.py b/backend/app/core/enums.py
similarity index 94%
rename from backend/app/core/models/enums.py
rename to backend/app/core/enums.py
index 8ba6175..83a5e48 100644
--- a/backend/app/core/models/enums.py
+++ b/backend/app/core/enums.py
@@ -3,6 +3,9 @@
 This module defines all enum types used throughout the game engine. We use StrEnum
 for JSON serialization compatibility - enum values serialize as strings directly.
 
+This is the foundational module with zero internal dependencies, allowing other
+core modules to import from it without circular import concerns.
+
 Note on extensibility: While these enums define the standard types, the game engine
 is designed to be configurable. Custom energy types or card types could be added
 via configuration for free play mode.
@@ -199,3 +202,17 @@ class ModifierMode(StrEnum):
 
     MULTIPLICATIVE = "multiplicative"
     ADDITIVE = "additive"
+
+
+__all__ = [
+    "ActionType",
+    "CardType",
+    "EnergyType",
+    "GameEndReason",
+    "ModifierMode",
+    "PokemonStage",
+    "PokemonVariant",
+    "StatusCondition",
+    "TrainerType",
+    "TurnPhase",
+]
diff --git a/backend/app/core/models/__init__.py b/backend/app/core/models/__init__.py
index a7230e4..efae8fb 100644
--- a/backend/app/core/models/__init__.py
+++ b/backend/app/core/models/__init__.py
@@ -1,20 +1,20 @@
 """Core data models for the Mantimon TCG game engine.
 
-This module contains all Pydantic models used throughout the game engine:
-    - enums: Enumeration types (CardType, EnergyType, TurnPhase, etc.)
-    - card: CardDefinition (template) and CardInstance (in-game state)
-    - actions: Player action types as a discriminated union
-    - game_state: GameState, PlayerState, and Zone models
+This module exports Pydantic models for cards, game state, and actions.
 
-Note: To avoid circular imports, game_state is not imported at module level.
-Import directly from app.core.models.game_state when needed:
+For enums, import from app.core.enums or app.core:
+    from app.core.enums import CardType, EnergyType, TurnPhase
+    from app.core import CardType, EnergyType  # convenience
 
-    from app.core.models.game_state import GameState, PlayerState, Zone
-
-Or import after config is already loaded:
-
-    from app.core.models import enums, card, actions
-    from app.core.models import game_state  # Import after other modules
+Usage:
+    from app.core.models import (
+        # Card models
+        CardDefinition, CardInstance, Attack, Ability,
+        # Game state
+        GameState, PlayerState, Zone, ForcedAction,
+        # Actions
+        Action, AttackAction, PlayPokemonAction, parse_action,
+    )
 """
 
 from app.core.models.actions import (
@@ -40,38 +40,25 @@ from app.core.models.card import (
     CardInstance,
     WeaknessResistance,
 )
-from app.core.models.enums import (
-    ActionType,
-    CardType,
-    EnergyType,
-    GameEndReason,
-    PokemonStage,
-    PokemonVariant,
-    StatusCondition,
-    TrainerType,
-    TurnPhase,
+from app.core.models.game_state import (
+    ForcedAction,
+    GameState,
+    PlayerState,
+    Zone,
 )
 
-# Note: GameState, PlayerState, Zone are imported from game_state module directly
-# to avoid circular imports with app.core.config
-
 __all__ = [
-    # Enums
-    "ActionType",
-    "CardType",
-    "EnergyType",
-    "GameEndReason",
-    "PokemonStage",
-    "PokemonVariant",
-    "StatusCondition",
-    "TrainerType",
-    "TurnPhase",
     # Card models
     "Ability",
     "Attack",
     "CardDefinition",
     "CardInstance",
     "WeaknessResistance",
+    # Game state models
+    "ForcedAction",
+    "GameState",
+    "PlayerState",
+    "Zone",
     # Action models
     "Action",
     "AttachEnergyAction",
diff --git a/backend/app/core/models/card.py b/backend/app/core/models/card.py
index 54e52dd..ae30098 100644
--- a/backend/app/core/models/card.py
+++ b/backend/app/core/models/card.py
@@ -33,7 +33,7 @@ from typing import Any
 
 from pydantic import BaseModel, Field, model_validator
 
-from app.core.models.enums import (
+from app.core.enums import (
     CardType,
     EnergyType,
     ModifierMode,
diff --git a/backend/app/core/models/game_state.py b/backend/app/core/models/game_state.py
index 34c601c..38c1453 100644
--- a/backend/app/core/models/game_state.py
+++ b/backend/app/core/models/game_state.py
@@ -10,7 +10,8 @@ so that the game can be serialized/deserialized without external dependencies.
 This supports both live multiplayer and offline/standalone play.
 
 Usage:
-    # Create a new game
+    from app.core.config import RulesConfig
+
     game = GameState(
         game_id="match-123",
         rules=RulesConfig(),
@@ -32,8 +33,8 @@ from typing import Any
 from pydantic import BaseModel, Field
 
 from app.core.config import RulesConfig
+from app.core.enums import GameEndReason, TurnPhase
 from app.core.models.card import CardDefinition, CardInstance
-from app.core.models.enums import GameEndReason, TurnPhase
 from app.core.rng import RandomProvider
 
 
diff --git a/backend/app/core/rules_validator.py b/backend/app/core/rules_validator.py
index 709e5d5..b8419a4 100644
--- a/backend/app/core/rules_validator.py
+++ b/backend/app/core/rules_validator.py
@@ -24,6 +24,12 @@ Example:
 
 from pydantic import BaseModel
 
+from app.core.enums import (
+    EnergyType,
+    StatusCondition,
+    TrainerType,
+    TurnPhase,
+)
 from app.core.models.actions import (
     VALID_PHASES_FOR_ACTION,
     Action,
@@ -40,12 +46,6 @@ from app.core.models.actions import (
     UseAbilityAction,
 )
 from app.core.models.card import CardDefinition, CardInstance
-from app.core.models.enums import (
-    EnergyType,
-    StatusCondition,
-    TrainerType,
-    TurnPhase,
-)
 from app.core.models.game_state import GameState, PlayerState, Zone
 
 
diff --git a/backend/app/core/turn_manager.py b/backend/app/core/turn_manager.py
index d8ac801..612bbfd 100644
--- a/backend/app/core/turn_manager.py
+++ b/backend/app/core/turn_manager.py
@@ -49,7 +49,7 @@ from typing import TYPE_CHECKING
 
 from pydantic import BaseModel
 
-from app.core.models.enums import GameEndReason, StatusCondition, TurnPhase
+from app.core.enums import GameEndReason, StatusCondition, TurnPhase
 from app.core.win_conditions import WinResult, check_cannot_draw
 
 if TYPE_CHECKING:
diff --git a/backend/app/core/visibility.py b/backend/app/core/visibility.py
index 3d50f66..a21c6c6 100644
--- a/backend/app/core/visibility.py
+++ b/backend/app/core/visibility.py
@@ -37,8 +37,8 @@ from typing import TYPE_CHECKING
 
 from pydantic import BaseModel, Field
 
+from app.core.enums import GameEndReason, TurnPhase
 from app.core.models.card import CardDefinition, CardInstance
-from app.core.models.enums import GameEndReason, TurnPhase
 
 if TYPE_CHECKING:
     from app.core.models.game_state import GameState
diff --git a/backend/app/core/win_conditions.py b/backend/app/core/win_conditions.py
index 6142201..bfa5822 100644
--- a/backend/app/core/win_conditions.py
+++ b/backend/app/core/win_conditions.py
@@ -39,7 +39,7 @@ from typing import TYPE_CHECKING
 
 from pydantic import BaseModel
 
-from app.core.models.enums import GameEndReason
+from app.core.enums import GameEndReason
 
 if TYPE_CHECKING:
     from app.core.models.game_state import GameState
diff --git a/backend/references/console_testing.py b/backend/references/console_testing.py
index 1884749..782e1f1 100644
--- a/backend/references/console_testing.py
+++ b/backend/references/console_testing.py
@@ -46,19 +46,19 @@ from app.core.config import (
 )
 from app.core.effects.base import EffectContext
 from app.core.effects.registry import list_effects
-from app.core.models.card import (
-    Attack,
-    CardDefinition,
-    CardInstance,
-    WeaknessResistance,
-)
-from app.core.models.enums import (
+from app.core.enums import (
     CardType,
     EnergyType,
     PokemonStage,
     TrainerType,
     TurnPhase,
 )
+from app.core.models.card import (
+    Attack,
+    CardDefinition,
+    CardInstance,
+    WeaknessResistance,
+)
 from app.core.models.game_state import GameState, PlayerState
 from app.core.rng import SeededRandom
 
diff --git a/backend/tests/core/conftest.py b/backend/tests/core/conftest.py
index 1218932..32d23de 100644
--- a/backend/tests/core/conftest.py
+++ b/backend/tests/core/conftest.py
@@ -16,14 +16,7 @@ Usage:
 import pytest
 
 from app.core.config import RulesConfig
-from app.core.models.card import (
-    Ability,
-    Attack,
-    CardDefinition,
-    CardInstance,
-    WeaknessResistance,
-)
-from app.core.models.enums import (
+from app.core.enums import (
     CardType,
     EnergyType,
     PokemonStage,
@@ -31,6 +24,13 @@ from app.core.models.enums import (
     TrainerType,
     TurnPhase,
 )
+from app.core.models.card import (
+    Ability,
+    Attack,
+    CardDefinition,
+    CardInstance,
+    WeaknessResistance,
+)
 from app.core.models.game_state import GameState, PlayerState
 from app.core.rng import SeededRandom
 
@@ -937,7 +937,7 @@ def game_over_state(extended_card_registry, card_instance_factory) -> GameState:
 
     - Player1 has won
     """
-    from app.core.models.enums import GameEndReason
+    from app.core.enums import GameEndReason
 
     player1 = PlayerState(player_id="player1")
     player2 = PlayerState(player_id="player2")
diff --git a/backend/tests/core/test_config.py b/backend/tests/core/test_config.py
index 0c4144c..4325730 100644
--- a/backend/tests/core/test_config.py
+++ b/backend/tests/core/test_config.py
@@ -23,7 +23,7 @@ from app.core.config import (
     TrainerConfig,
     WinConditionsConfig,
 )
-from app.core.models.enums import EnergyType, PokemonVariant
+from app.core.enums import EnergyType, PokemonVariant
 
 
 class TestDeckConfig:
diff --git a/backend/tests/core/test_coverage_gaps.py b/backend/tests/core/test_coverage_gaps.py
index 624fc21..0064a99 100644
--- a/backend/tests/core/test_coverage_gaps.py
+++ b/backend/tests/core/test_coverage_gaps.py
@@ -16,6 +16,7 @@ import pytest
 from app.core.config import RulesConfig
 from app.core.effects.base import EffectContext
 from app.core.effects.handlers import handle_attack_damage, handle_coin_flip_damage
+from app.core.enums import TurnPhase
 from app.core.models.actions import (
     AttackAction,
     PassAction,
@@ -24,7 +25,6 @@ from app.core.models.actions import (
     SelectPrizeAction,
 )
 from app.core.models.card import CardInstance
-from app.core.models.enums import TurnPhase
 from app.core.models.game_state import ForcedAction, GameState, PlayerState
 from app.core.rng import SeededRandom
 from app.core.rules_validator import validate_action
diff --git a/backend/tests/core/test_effects/test_base.py b/backend/tests/core/test_effects/test_base.py
index 2c3e451..ae29e59 100644
--- a/backend/tests/core/test_effects/test_base.py
+++ b/backend/tests/core/test_effects/test_base.py
@@ -10,8 +10,8 @@ These tests verify:
 
 from app.core.config import RulesConfig
 from app.core.effects.base import EffectContext, EffectResult, EffectType
+from app.core.enums import CardType, EnergyType, PokemonStage
 from app.core.models.card import CardDefinition, CardInstance
-from app.core.models.enums import CardType, EnergyType, PokemonStage
 from app.core.models.game_state import GameState, PlayerState
 from app.core.rng import SeededRandom
 
diff --git a/backend/tests/core/test_effects/test_handlers.py b/backend/tests/core/test_effects/test_handlers.py
index a4e2fc7..45cad46 100644
--- a/backend/tests/core/test_effects/test_handlers.py
+++ b/backend/tests/core/test_effects/test_handlers.py
@@ -16,8 +16,8 @@ import app.core.effects.handlers  # noqa: F401
 from app.core.config import RulesConfig
 from app.core.effects.base import EffectContext, EffectType
 from app.core.effects.registry import resolve_effect
+from app.core.enums import CardType, EnergyType, PokemonStage, StatusCondition
 from app.core.models.card import CardDefinition, CardInstance, WeaknessResistance
-from app.core.models.enums import CardType, EnergyType, PokemonStage, StatusCondition
 from app.core.models.game_state import GameState, PlayerState
 from app.core.rng import SeededRandom
 
@@ -549,7 +549,7 @@ class TestAttackDamage:
         Verify attack_damage uses additive weakness when configured in RulesConfig.
         """
         from app.core.config import CombatConfig
-        from app.core.models.enums import ModifierMode
+        from app.core.enums import ModifierMode
 
         # Configure game to use additive weakness (+20)
         game_state.rules.combat = CombatConfig(
@@ -593,7 +593,7 @@ class TestAttackDamage:
         This test verifies the mode switching works with integer values.
         """
         from app.core.config import CombatConfig
-        from app.core.models.enums import ModifierMode
+        from app.core.enums import ModifierMode
 
         # Configure game to use multiplicative resistance (x1 = no change)
         game_state.rules.combat = CombatConfig(
@@ -631,7 +631,7 @@ class TestAttackDamage:
         Verify a card can override the game's default weakness mode.
         Even if game uses multiplicative x2, card can specify additive +40.
         """
-        from app.core.models.enums import ModifierMode
+        from app.core.enums import ModifierMode
 
         # Game uses default multiplicative x2, but card overrides to additive +40
         game_state.card_registry["charmander-001"] = CardDefinition(
diff --git a/backend/tests/core/test_effects/test_registry.py b/backend/tests/core/test_effects/test_registry.py
index 04cdc66..db2502e 100644
--- a/backend/tests/core/test_effects/test_registry.py
+++ b/backend/tests/core/test_effects/test_registry.py
@@ -22,8 +22,8 @@ from app.core.effects.registry import (
     resolve_effect,
     unregister_handler,
 )
+from app.core.enums import CardType, EnergyType, PokemonStage
 from app.core.models.card import CardDefinition, CardInstance
-from app.core.models.enums import CardType, EnergyType, PokemonStage
 from app.core.models.game_state import GameState, PlayerState
 from app.core.rng import SeededRandom
 
diff --git a/backend/tests/core/test_engine.py b/backend/tests/core/test_engine.py
index 27f3204..ff66b0a 100644
--- a/backend/tests/core/test_engine.py
+++ b/backend/tests/core/test_engine.py
@@ -17,6 +17,16 @@ import pytest
 
 from app.core.config import RulesConfig
 from app.core.engine import GameEngine
+from app.core.enums import (
+    CardType,
+    EnergyType,
+    GameEndReason,
+    PokemonStage,
+    PokemonVariant,
+    StatusCondition,
+    TrainerType,
+    TurnPhase,
+)
 from app.core.models.actions import (
     AttachEnergyAction,
     AttackAction,
@@ -30,16 +40,6 @@ from app.core.models.actions import (
     UseAbilityAction,
 )
 from app.core.models.card import Ability, Attack, CardDefinition, CardInstance
-from app.core.models.enums import (
-    CardType,
-    EnergyType,
-    GameEndReason,
-    PokemonStage,
-    PokemonVariant,
-    StatusCondition,
-    TrainerType,
-    TurnPhase,
-)
 from app.core.models.game_state import ForcedAction, GameState
 from app.core.rng import SeededRandom
 
diff --git a/backend/tests/core/test_evolution_stack.py b/backend/tests/core/test_evolution_stack.py
index 223a544..bc4be71 100644
--- a/backend/tests/core/test_evolution_stack.py
+++ b/backend/tests/core/test_evolution_stack.py
@@ -24,9 +24,7 @@ from app.core.config import RulesConfig
 from app.core.effects.base import EffectContext
 from app.core.effects.registry import resolve_effect
 from app.core.engine import GameEngine
-from app.core.models.actions import EvolvePokemonAction
-from app.core.models.card import Attack, CardDefinition, CardInstance
-from app.core.models.enums import (
+from app.core.enums import (
     CardType,
     EnergyType,
     PokemonStage,
@@ -35,6 +33,8 @@ from app.core.models.enums import (
     TrainerType,
     TurnPhase,
 )
+from app.core.models.actions import EvolvePokemonAction
+from app.core.models.card import Attack, CardDefinition, CardInstance
 from app.core.models.game_state import GameState, PlayerState
 from app.core.rng import SeededRandom
 from app.core.turn_manager import TurnManager
diff --git a/backend/tests/core/test_models/test_card.py b/backend/tests/core/test_models/test_card.py
index 2e36758..d13d80c 100644
--- a/backend/tests/core/test_models/test_card.py
+++ b/backend/tests/core/test_models/test_card.py
@@ -8,14 +8,7 @@ These tests verify:
 5. JSON serialization round-trips work
 """
 
-from app.core.models.card import (
-    Ability,
-    Attack,
-    CardDefinition,
-    CardInstance,
-    WeaknessResistance,
-)
-from app.core.models.enums import (
+from app.core.enums import (
     CardType,
     EnergyType,
     PokemonStage,
@@ -23,6 +16,13 @@ from app.core.models.enums import (
     StatusCondition,
     TrainerType,
 )
+from app.core.models.card import (
+    Ability,
+    Attack,
+    CardDefinition,
+    CardInstance,
+    WeaknessResistance,
+)
 
 
 class TestAttack:
diff --git a/backend/tests/core/test_models/test_enums.py b/backend/tests/core/test_models/test_enums.py
index 1a18221..09a4d5f 100644
--- a/backend/tests/core/test_models/test_enums.py
+++ b/backend/tests/core/test_models/test_enums.py
@@ -12,7 +12,7 @@ import json
 import pytest
 from pydantic import BaseModel
 
-from app.core.models.enums import (
+from app.core.enums import (
     ActionType,
     CardType,
     EnergyType,
diff --git a/backend/tests/core/test_models/test_game_state.py b/backend/tests/core/test_models/test_game_state.py
index d8404bf..dd5b7d8 100644
--- a/backend/tests/core/test_models/test_game_state.py
+++ b/backend/tests/core/test_models/test_game_state.py
@@ -8,8 +8,8 @@ These tests verify:
 """
 
 from app.core.config import RulesConfig
+from app.core.enums import CardType, EnergyType, GameEndReason, PokemonStage, TurnPhase
 from app.core.models.card import CardDefinition, CardInstance
-from app.core.models.enums import CardType, EnergyType, GameEndReason, PokemonStage, TurnPhase
 from app.core.models.game_state import GameState, PlayerState, Zone
 from app.core.rng import SeededRandom
 
diff --git a/backend/tests/core/test_rules_validator.py b/backend/tests/core/test_rules_validator.py
index 8e601f7..188fc68 100644
--- a/backend/tests/core/test_rules_validator.py
+++ b/backend/tests/core/test_rules_validator.py
@@ -15,6 +15,10 @@ from app.core.config import (
     RetreatConfig,
     TrainerConfig,
 )
+from app.core.enums import (
+    StatusCondition,
+    TurnPhase,
+)
 from app.core.models.actions import (
     AttachEnergyAction,
     AttackAction,
@@ -29,10 +33,6 @@ from app.core.models.actions import (
     UseAbilityAction,
 )
 from app.core.models.card import CardInstance
-from app.core.models.enums import (
-    StatusCondition,
-    TurnPhase,
-)
 from app.core.models.game_state import ForcedAction, GameState
 from app.core.rules_validator import validate_action
 
diff --git a/backend/tests/core/test_turn_manager.py b/backend/tests/core/test_turn_manager.py
index 6f98d88..ea87913 100644
--- a/backend/tests/core/test_turn_manager.py
+++ b/backend/tests/core/test_turn_manager.py
@@ -16,8 +16,7 @@ import pytest
 from app.core.config import (
     RulesConfig,
 )
-from app.core.models.card import CardDefinition, CardInstance
-from app.core.models.enums import (
+from app.core.enums import (
     CardType,
     EnergyType,
     GameEndReason,
@@ -26,6 +25,7 @@ from app.core.models.enums import (
     StatusCondition,
     TurnPhase,
 )
+from app.core.models.card import CardDefinition, CardInstance
 from app.core.models.game_state import GameState, PlayerState
 from app.core.rng import SeededRandom
 from app.core.turn_manager import (
@@ -1497,7 +1497,7 @@ class TestPrizeCardModeKnockout:
 
         EX/GX Pokemon are worth 2 prize cards.
         """
-        from app.core.models.enums import PokemonVariant
+        from app.core.enums import PokemonVariant
 
         # Add EX pokemon definition
         ex_def = CardDefinition(
diff --git a/backend/tests/core/test_visibility.py b/backend/tests/core/test_visibility.py
index 97f8f0a..281c0ab 100644
--- a/backend/tests/core/test_visibility.py
+++ b/backend/tests/core/test_visibility.py
@@ -15,8 +15,7 @@ Test categories:
 import pytest
 
 from app.core.config import RulesConfig
-from app.core.models.card import CardDefinition, CardInstance
-from app.core.models.enums import (
+from app.core.enums import (
     CardType,
     EnergyType,
     GameEndReason,
@@ -25,6 +24,7 @@ from app.core.models.enums import (
     TrainerType,
     TurnPhase,
 )
+from app.core.models.card import CardDefinition, CardInstance
 from app.core.models.game_state import ForcedAction, GameState, PlayerState
 from app.core.visibility import (
     VisibleGameState,
diff --git a/backend/tests/core/test_win_conditions.py b/backend/tests/core/test_win_conditions.py
index 73cdf59..ce7c124 100644
--- a/backend/tests/core/test_win_conditions.py
+++ b/backend/tests/core/test_win_conditions.py
@@ -16,7 +16,7 @@ Each test includes a docstring explaining the "what" and "why" of the test.
 import pytest
 
 from app.core.config import PrizeConfig, RulesConfig, WinConditionsConfig
-from app.core.models.enums import GameEndReason, TurnPhase
+from app.core.enums import GameEndReason, TurnPhase
 from app.core.models.game_state import GameState, PlayerState
 from app.core.win_conditions import (
     WinResult,