diff --git a/src/game/minigames/types.ts b/src/game/minigames/types.ts
new file mode 100644
index 0000000..257581b
--- /dev/null
+++ b/src/game/minigames/types.ts
@@ -0,0 +1,51 @@
+// Tipos para motor de minijuegos (mina, pesca, pelea, plantar).
+// JSON flexible: estos tipos solo guían el shape esperado en GameAreaLevel.requirements/rewards/mobs.
+
+export type ToolRequirement = {
+  required?: boolean; // si se requiere herramienta
+  toolType?: string; // 'pickaxe' | 'rod' | 'sword' | ...
+  minTier?: number;  // nivel mínimo de herramienta
+  allowedKeys?: string[]; // lista blanca de item keys específicos
+};
+
+export type LevelRequirements = {
+  tool?: ToolRequirement;
+  // extensible: stamina, consumibles, roles requeridos, etc.
+  [k: string]: unknown;
+};
+
+export type WeightedReward =
+  | { type: 'coins'; amount: number; weight: number }
+  | { type: 'item'; itemKey: string; qty: number; weight: number };
+
+export type RewardsTable = {
+  draws?: number; // cuántas extracciones realizar (default 1)
+  table: WeightedReward[];
+};
+
+export type WeightedMob = { mobKey: string; weight: number };
+
+export type MobsTable = {
+  draws?: number; // cuántos mobs intentar spawnear (default 0)
+  table: WeightedMob[];
+};
+
+export type LevelConfig = {
+  requirements?: LevelRequirements;
+  rewards?: RewardsTable;
+  mobs?: MobsTable;
+  // extensible: multiplicadores, riesgos, etc.
+  [k: string]: unknown;
+};
+
+export type RunMinigameOptions = {
+  toolKey?: string; // herramienta elegida por el jugador
+};
+
+export type RunResult = {
+  success: boolean;
+  rewards: Array<{ type: 'coins' | 'item'; amount?: number; itemKey?: string; qty?: number }>;
+  mobs: string[]; // keys de mobs spawneados
+  tool?: { key?: string; durabilityDelta?: number; broken?: boolean };
+};
+