diff --git a/src/core/game-host.ts b/src/core/game-host.ts
index bf371de..92e9138 100644
--- a/src/core/game-host.ts
+++ b/src/core/game-host.ts
@@ -1,5 +1,5 @@
 import { ReadonlySignal, signal, Signal } from '@preact/signals-core';
-import type { CommandSchema, CommandRegistry, CommandResult } from '@/utils/command';
+import type { CommandSchema, CommandRegistry, CommandResult, PromptEvent } from '@/utils/command';
 import type { MutableSignal } from '@/utils/mutable-signal';
 import { createGameContext } from './game';
 
@@ -14,10 +14,12 @@ export class GameHost<TState extends Record<string, unknown>> {
     readonly commands: ReturnType<typeof createGameContext<TState>>['commands'];
     readonly status: ReadonlySignal<GameHostStatus>;
     readonly activePromptSchema: ReadonlySignal<CommandSchema | null>;
+    readonly activePromptPlayer: ReadonlySignal<string | null>;
 
     private _state: MutableSignal<TState>;
     private _status: Signal<GameHostStatus>;
     private _activePromptSchema: Signal<CommandSchema | null>;
+    private _activePromptPlayer: Signal<string | null>;
     private _createInitialState: () => TState;
     private _setupCommand: string;
     private _eventListeners: Map<'setup' | 'dispose', Set<() => void>>;
@@ -45,6 +47,9 @@ export class GameHost<TState extends Record<string, unknown>> {
         this._activePromptSchema = new Signal<CommandSchema | null>(null);
         this.activePromptSchema = this._activePromptSchema;
 
+        this._activePromptPlayer = new Signal<string | null>(null);
+        this.activePromptPlayer = this._activePromptPlayer;
+
         this.state = this._state;
 
         this._setupPromptTracking();
@@ -55,20 +60,23 @@ export class GameHost<TState extends Record<string, unknown>> {
     }
 
     private _setupPromptTracking() {
-        const updateSchema = () => {
-            const activePrompt = (this.commands as any)._activePrompt as { schema?: CommandSchema } | null;
-            this._activePromptSchema.value = activePrompt?.schema ?? null;
-        };
+        let currentPromptEvent: PromptEvent | null = null;
 
-        this.commands.on('prompt', () => {
-            updateSchema();
+        this.commands.on('prompt', (e) => {
+            currentPromptEvent = e as PromptEvent;
+            this._activePromptSchema.value = currentPromptEvent.schema;
+            this._activePromptPlayer.value = currentPromptEvent.currentPlayer;
         });
 
         this.commands.on('promptEnd', () => {
-            updateSchema();
+            currentPromptEvent = null;
+            this._activePromptSchema.value = null;
+            this._activePromptPlayer.value = null;
         });
 
-        updateSchema();
+        // Initial state
+        this._activePromptSchema.value = null;
+        this._activePromptPlayer.value = null;
     }
 
     onInput(input: string): string | null {
diff --git a/src/samples/boop/index.ts b/src/samples/boop/index.ts
index 94d7dc9..b967b15 100644
--- a/src/samples/boop/index.ts
+++ b/src/samples/boop/index.ts
@@ -113,7 +113,8 @@ registration.add('turn <player>', async function(cmd) {
                 return `No ${pieceType}s left in ${player}'s supply.`;
             }
             return null;
-        }
+        },
+        this.context.value.currentPlayer
     );
     const [player, row, col, type] = playCmd.params as [PlayerType, number, number, PieceType?];
     const pieceType = type === 'cat' ? 'cat' : 'kitten';
@@ -141,7 +142,8 @@ registration.add('turn <player>', async function(cmd) {
                     const part = availableKittens.find(p => `${p.position[0]},${p.position[1]}` === posKey);
                     if (!part) return `No kitten at (${row}, ${col}).`;
                     return null;
-                }
+                },
+                this.context.value.currentPlayer
             );
             const [row, col] = graduateCmd.params as [number, number];
             const part = availableKittens.find(p => p.position[0] === row && p.position[1] === col)!;
diff --git a/src/samples/tic-tac-toe.ts b/src/samples/tic-tac-toe.ts
index d77c513..8231889 100644
--- a/src/samples/tic-tac-toe.ts
+++ b/src/samples/tic-tac-toe.ts
@@ -73,7 +73,8 @@ registration.add('turn <player> <turn:number>', async function(cmd) {
                 return `Cell (${row}, ${col}) is already occupied.`;
             }
             return null;
-        }
+        },
+        this.context.value.currentPlayer
     );
     const [player, row, col] = playCmd.params as [PlayerType, number, number];
 
diff --git a/src/utils/command/command-registry.ts b/src/utils/command/command-registry.ts
index 2b3d62a..d93817d 100644
--- a/src/utils/command/command-registry.ts
+++ b/src/utils/command/command-registry.ts
@@ -104,7 +104,8 @@ export function createCommandRunnerContext<TContext>(
 
     const prompt = (
         schema: CommandSchema | string,
-        validator?: (command: Command) => string | null
+        validator?: (command: Command) => string | null,
+        currentPlayer?: string | null
     ): Promise<Command> => {
         const resolvedSchema = typeof schema === 'string' ? parseCommandSchema(schema) : schema;
         return new Promise((resolve, reject) => {
@@ -120,10 +121,12 @@ export function createCommandRunnerContext<TContext>(
                 return null;
             };
             const cancel = (reason?: string) => {
+                activePrompt = null;
+                emitPromptEnd();
                 reject(new Error(reason ?? 'Cancelled'));
             };
-            activePrompt = { schema: resolvedSchema, tryCommit, cancel };
-            const event: PromptEvent = { schema: resolvedSchema, tryCommit, cancel };
+            activePrompt = { schema: resolvedSchema, currentPlayer: currentPlayer ?? null, tryCommit, cancel };
+            const event: PromptEvent = { schema: resolvedSchema, currentPlayer: currentPlayer ?? null, tryCommit, cancel };
             for (const listener of promptListeners) {
                 listener(event);
             }
diff --git a/src/utils/command/command-runner.ts b/src/utils/command/command-runner.ts
index 77c1d44..82b514d 100644
--- a/src/utils/command/command-runner.ts
+++ b/src/utils/command/command-runner.ts
@@ -4,6 +4,8 @@ import { applyCommandSchema } from './command-validate';
 
 export type PromptEvent = {
     schema: CommandSchema;
+    /** 当前等待输入的玩家 */
+    currentPlayer: string | null;
     /**
      * 尝试提交命令
      * @param commandOrInput Command 对象或命令字符串
@@ -33,7 +35,7 @@ export type CommandRunnerContext<TContext> = {
     context: TContext;
     run: <T=unknown>(input: string) => Promise<CommandResult<T>>;
     runParsed: (command: Command) => Promise<{ success: true; result: unknown } | { success: false; error: string }>;
-    prompt: (schema: CommandSchema | string, validator?: (command: Command) => string | null) => Promise<Command>;
+    prompt: (schema: CommandSchema | string, validator?: (command: Command) => string | null, currentPlayer?: string | null) => Promise<Command>;
     on: <T extends keyof CommandRunnerEvents>(event: T, listener: (e: CommandRunnerEvents[T]) => void) => void;
     off: <T extends keyof CommandRunnerEvents>(event: T, listener: (e: CommandRunnerEvents[T]) => void) => void;
 };
diff --git a/tests/core/game-host.test.ts b/tests/core/game-host.test.ts
index 4d250ec..ff4fce7 100644
--- a/tests/core/game-host.test.ts
+++ b/tests/core/game-host.test.ts
@@ -410,4 +410,50 @@ describe('GameHost', () => {
             expect(host.status.value).toBe('disposed');
         });
     });
+
+    describe('currentPlayer in prompt', () => {
+        it('should have currentPlayer in PromptEvent', async () => {
+            const { host } = createTestHost();
+
+            const promptPromise = waitForPromptEvent(host);
+            const runPromise = host.commands.run('setup');
+
+            const promptEvent = await promptPromise;
+            expect(promptEvent.currentPlayer).toBe('X');
+            expect(host.activePromptPlayer.value).toBe('X');
+
+            promptEvent.cancel('test cleanup');
+            await runPromise;
+        });
+
+        it('should update activePromptPlayer reactively', async () => {
+            const { host } = createTestHost();
+
+            // Initially null
+            expect(host.activePromptPlayer.value).toBeNull();
+
+            // First prompt - X's turn
+            let promptPromise = waitForPromptEvent(host);
+            let runPromise = host.commands.run('setup');
+            let promptEvent = await promptPromise;
+            expect(promptEvent.currentPlayer).toBe('X');
+            expect(host.activePromptPlayer.value).toBe('X');
+
+            // Make a move
+            promptEvent.tryCommit({ name: 'play', params: ['X', 1, 1], options: {}, flags: {} });
+
+            // Second prompt - O's turn
+            promptPromise = waitForPromptEvent(host);
+            promptEvent = await promptPromise;
+            expect(promptEvent.currentPlayer).toBe('O');
+            expect(host.activePromptPlayer.value).toBe('O');
+
+            // Cancel
+            promptEvent.cancel('test cleanup');
+            await runPromise;
+
+            // After prompt ends, player should be null
+            expect(host.activePromptPlayer.value).toBeNull();
+        });
+    });
 });