diff --git a/apps/api/src/combat/combat-engine.types.ts b/apps/api/src/combat/combat-engine.types.ts
index b108363..31be226 100644
--- a/apps/api/src/combat/combat-engine.types.ts
+++ b/apps/api/src/combat/combat-engine.types.ts
@@ -3,10 +3,21 @@ import { CombatAction } from './combat-action.enum';
 import { CombatEventType } from './combat-event-type.enum';
 import { CombatStatus } from './combat-status.enum';
 
+// Only HEAVY_ATTACK needs telegraphing today; NORMAL_ATTACK resolves
+// immediately and is never held as a pending intent (Playable Slice 0.6
+// spec §5). Add members here as future slices add more prepared actions.
+export type CombatIntent = 'HEAVY_ATTACK';
+
 export interface CombatEngineCombatantStats {
   attack: number;
   weaponDamage?: number;
   armor: number;
+  // Player-only: seeded at combat start, decremented by POTION. Optional
+  // because the monster's stats never carry it.
+  potionsRemaining?: number;
+  // Monster-only: set when it telegraphs, cleared when the action resolves
+  // or is interrupted. Optional because the player's stats never carry it.
+  pendingAction?: CombatIntent;
 }
 
 export interface CombatEngineCombatant {
diff --git a/apps/api/src/combat/entities/combat.entity.ts b/apps/api/src/combat/entities/combat.entity.ts
index c767d18..5b2091f 100644
--- a/apps/api/src/combat/entities/combat.entity.ts
+++ b/apps/api/src/combat/entities/combat.entity.ts
@@ -11,15 +11,18 @@ import {
 import { Character } from '../../characters/entities/character.entity';
 import { HuntEncounter } from '../../hunting/entities/hunt-encounter.entity';
 import { MonsterDefinition } from '../../monsters/entities/monster-definition.entity';
+import { CombatIntent } from '../combat-engine.types';
 import { CombatStatus } from '../combat-status.enum';
 
 export interface CombatCombatantState {
   attack: number;
   armor: number;
+  pendingAction?: CombatIntent;
 }
 
 export interface CombatPlayerState extends CombatCombatantState {
   weaponDamage: number;
+  potionsRemaining: number;
 }
 
 @Entity({ name: 'combats' })