diff --git a/src/core/game-host.ts b/src/core/game-host.ts
index 26f04c4..da2de92 100644
--- a/src/core/game-host.ts
+++ b/src/core/game-host.ts
@@ -3,8 +3,9 @@ import {
     CommandSchema,
     CommandRegistry,
     PromptEvent,
+    parseCommandSchema,
 } from '@/utils/command';
-import {createGameCommandRegistry, createGameContext, IGameContext} from './game';
+import {createGameCommandRegistry, createGameContext, IGameContext, PromptDef} from './game';
 
 export type GameHostStatus = 'created' | 'running' | 'disposed';
 
@@ -74,6 +75,16 @@ export class GameHost<TState extends Record<string, unknown>, TResult=unknown> {
         }
         return this._context._commands._tryCommit(input);
     }
+    
+    tryAnswerPrompt<TArgs extends any[]>(def: PromptDef<TArgs>, ...args: TArgs){
+        if(typeof def.schema === 'string') def.schema = parseCommandSchema(def.schema);
+        return this._context._commands._tryCommit({
+            name: def.schema.name,
+            params: args,
+            options: {},
+            flags: {}
+        });
+    }
 
     /**
      * 为下一个 produceAsync 注册中断 Promise（通常用于 UI 动画）。
diff --git a/src/core/game.ts b/src/core/game.ts
index 978c902..18fce66 100644
--- a/src/core/game.ts
+++ b/src/core/game.ts
@@ -15,7 +15,7 @@ export interface IGameContext<TState extends Record<string, unknown> = {} > {
     produceAsync(fn: (draft: TState) => void): Promise<void>;
     run<T>(input: string): Promise<CommandResult<T>>;
     runParsed<T>(command: Command): Promise<CommandResult<T>>;
-    prompt: <TResult,TArgs extends any[]=any[]>(schema: CommandSchema | string, validator: PromptValidator<TResult,TArgs>, currentPlayer?: string | null) => Promise<TResult>;
+    prompt: <TResult,TArgs extends any[]=any[]>(def: PromptDef<TArgs>, validator: PromptValidator<TResult,TArgs>, currentPlayer?: string | null) => Promise<TResult>;
     addInterruption(promise: Promise<void>): void;
     
     // test only
@@ -47,8 +47,8 @@ export function createGameContext<TState extends Record<string, unknown> = {} >(
         runParsed<T>(command: Command) {
             return commands.runParsed<T>(command);
         },
-        prompt(schema, validator, currentPlayer) {
-            return commands.prompt(schema, validator, currentPlayer);
+        prompt(def, validator, currentPlayer) {
+            return commands.prompt(def.schema, validator, currentPlayer);
         },
         addInterruption(promise) {
             state.addInterruption(promise);
@@ -63,6 +63,13 @@ export function createGameContext<TState extends Record<string, unknown> = {} >(
     return context;
 }
 
+export type PromptDef<TArgs extends any[]=any[]> = {
+    schema: CommandSchema | string,
+}
+export function createPromptDef<TArgs extends any[]=any[]>(schema: CommandSchema | string): PromptDef<TArgs> {
+    return { schema };
+}
+
 export function createGameCommandRegistry<TState extends Record<string, unknown> = {} >() {
     return createCommandRegistry<IGameContext<TState>>();
 }
\ No newline at end of file
diff --git a/src/core/part-factory.ts b/src/core/part-factory.ts
index 0fbb77b..94d0ac2 100644
--- a/src/core/part-factory.ts
+++ b/src/core/part-factory.ts
@@ -1,7 +1,7 @@
 import {Part} from "./part";
 import {Immutable} from "mutative";
 
-export function createPartsFromTable<T>(items: T[], getId: (item: T, index: number) => string, getCount?: ((item: T) => number) | number){
+export function createPartsFromTable<T>(items: readonly T[], getId: (item: T, index: number) => string, getCount?: ((item: T) => number) | number){
   const pool: Record<string, Part<T>> = {};
   for (const entry of items) {
     const count = getCount ? (typeof getCount === 'function' ? getCount(entry) : getCount) : 1;
diff --git a/src/samples/boop/commands.ts b/src/samples/boop/commands.ts
index 4402c34..c062e2c 100644
--- a/src/samples/boop/commands.ts
+++ b/src/samples/boop/commands.ts
@@ -5,7 +5,9 @@
     PlayerType,
     WinnerType,
     WIN_LENGTH,
-    MAX_PIECES_PER_PLAYER, BoopGame
+    MAX_PIECES_PER_PLAYER,
+    BoopGame,
+    prompts
 } from "./data";
 import {createGameCommandRegistry} from "@/core/game";
 import {moveToRegion} from "@/core/region";
@@ -186,8 +188,8 @@ async function handleCheckFullBoard(game: BoopGame, turnPlayer: PlayerType){
     }
     
     const partId = await game.prompt(
-        'choose <player> <row:number> <col:number>',
-        (player: PlayerType, row: number, col: number) => {
+        prompts.choose,
+        (player, row, col) => {
             if (player !== turnPlayer) {
                 throw `Invalid player: ${player}. Expected ${turnPlayer}.`;
             }
@@ -218,8 +220,8 @@ const checkFullBoard = registry.register({
 
 async function handleTurn(game: BoopGame, turnPlayer: PlayerType) {
     const {row, col, type} = await game.prompt(
-        'play <player> <row:number> <col:number> [type:string]',
-        (player: PlayerType, row: number, col: number, type?: PieceType) => {
+        prompts.play,
+        (player, row, col, type) => {
             const pieceType = type === 'cat' ? 'cat' : 'kitten';
 
             if (player !== turnPlayer) {
diff --git a/src/samples/boop/data.ts b/src/samples/boop/data.ts
index fcb33ef..bff32e7 100644
--- a/src/samples/boop/data.ts
+++ b/src/samples/boop/data.ts
@@ -2,7 +2,7 @@
 import {createRegion, moveToRegion, Region} from "@/core/region";
 import {createPartsFromTable} from "@/core/part-factory";
 import {Part} from "@/core/part";
-import {IGameContext} from "@/core/game";
+import {createPromptDef, IGameContext} from "@/core/game";
 
 export const BOARD_SIZE = 6;
 export const MAX_PIECES_PER_PLAYER = 8;
@@ -14,6 +14,12 @@ export type WinnerType = PlayerType | 'draw' | null;
 export type RegionType = 'white' | 'black' | 'board' | '';
 export type BoopPartMeta = { player: PlayerType; type: PieceType };
 export type BoopPart = Part<BoopPartMeta>;
+export const prompts = {
+    play: createPromptDef<[PlayerType, number, number, PieceType?]>(
+        'play <player> <row:number> <col:number> [type:string]'),
+    choose: createPromptDef<[PlayerType, number, number]>(
+        'choose <player> <row:number> <col:number>')
+}
 
 export function createInitialState() {
     const pieces = createPartsFromTable(
diff --git a/src/samples/tic-tac-toe.ts b/src/samples/tic-tac-toe.ts
index c1673af..5de066f 100644
--- a/src/samples/tic-tac-toe.ts
+++ b/src/samples/tic-tac-toe.ts
@@ -2,6 +2,7 @@ import {
     createGameCommandRegistry, Part, createRegion,
     IGameContext
 } from '@/index';
+import {createPromptDef} from "@/core/game";
 
 const BOARD_SIZE = 3;
 const MAX_TURNS = BOARD_SIZE * BOARD_SIZE;
@@ -35,6 +36,10 @@ export function createInitialState() {
 export type TicTacToeState = ReturnType<typeof createInitialState>;
 export type TicTacToeGame = IGameContext<TicTacToeState>;
 export const registry = createGameCommandRegistry<TicTacToeState>();
+export const prompts = {
+    play: createPromptDef<[PlayerType, number, number]>(
+        'play <player> <row:number> <col:number>')
+}
 
 export async function start(game: TicTacToeGame) {
     while (true) {
@@ -59,8 +64,8 @@ const turn = registry.register({
     schema: 'turn <player> <turnNumber:number>',
     async run(game: TicTacToeGame, turnPlayer: PlayerType, turnNumber: number) {
         const {player, row, col} = await game.prompt(
-            'play <player> <row:number> <col:number>',
-            (player: string, row: number, col: number) => {
+            prompts.play,
+            (player, row, col) => {
                 if (player !== turnPlayer) {
                     throw `Invalid player: ${player}. Expected ${turnPlayer}.`;
                 } else if (!isValidMove(row, col)) {
diff --git a/tests/core/game.test.ts b/tests/core/game.test.ts
index 904cd65..4acb49a 100644
--- a/tests/core/game.test.ts
+++ b/tests/core/game.test.ts
@@ -51,7 +51,7 @@ describe('createGameContext', () => {
         const ctx = createGameContext(registry);
 
         registry.register('test <value>', async function (_ctx, value) {
-            return this.prompt<string>('prompt <answer>', () => 'ok');
+            return this.prompt({schema: 'prompt <answer>'}, () => 'ok');
         });
 
         const promptPromise = new Promise<PromptEvent>(resolve => {