diff --git a/examples/three-monks/commands.ts b/examples/three-monks/commands.ts
deleted file mode 100644
index b45d33e..0000000
--- a/examples/three-monks/commands.ts
+++ /dev/null
@@ -1,34 +0,0 @@
-import { defineComponent } from "../../src/component";
-import type { Entity, World } from "../../src/index";
-import type { CommandQueue } from "../../src/commands/index";
-import type { ActionKind } from "./components";
-import { selectAction } from "./rules";
-export interface SelectionNotifier {
-  notifySelectionChanged(): void;
-}
-
-export const SelectActionCard = defineComponent("threeMonks.selectActionCard", {
-  player: 0 as Entity,
-  kind: "rest" as ActionKind,
-});
-
-export function registerCommands(
-  world: World,
-  commands: CommandQueue,
-  flow?: SelectionNotifier,
-): void {
-  commands.handle(SelectActionCard, (command) => {
-    selectAction(world, command.player, command.kind);
-    flow?.notifySelectionChanged();
-  });
-}
-
-export function issueSelectAction(
-  world: World,
-  player: Entity,
-  kind: ActionKind,
-): Entity {
-  const command = world.spawn();
-  world.add(command, SelectActionCard, { player, kind });
-  return command;
-}
diff --git a/examples/three-monks/design.md b/examples/three-monks/design.md
index f438888..81c0509 100644
--- a/examples/three-monks/design.md
+++ b/examples/three-monks/design.md
@@ -71,7 +71,8 @@
 ## 设计实现
 
 - `components.ts`: 游戏数据与状态
-- `commands.ts`: 玩家命令与规则命令实现
 - `gameflow.ts`: 规则流程行为树
+- `rules.ts`: 规则引擎（阶段包装器 + 核心结算函数）
 - `logging.ts`: 日志输出
 - `simulate.ts`: 对局模拟与统计
+- `random-playthrough.ts`: 单局详细回放
diff --git a/examples/three-monks/gameflow.ts b/examples/three-monks/gameflow.ts
index 3bdd723..03d492d 100644
--- a/examples/three-monks/gameflow.ts
+++ b/examples/three-monks/gameflow.ts
@@ -9,7 +9,15 @@ import {
   type TaskRunner,
 } from "../../src/bt/index";
 import { allPlayersSelected, hasWinner } from "./components";
-import { beginSelectionPhase, prepareNextRound, resolveRound } from "./rules";
+import {
+  beginSelectionPhase,
+  chantPhase,
+  exchangePhase,
+  fetchWaterPhase,
+  drinkPhase,
+  endOfRoundPhase,
+  prepareNextRound,
+} from "./rules";
 
 export interface ThreeMonksFlow {
   runner: TaskRunner;
@@ -41,7 +49,11 @@ export function createThreeMonksFlow(world: World): ThreeMonksFlow {
             control.succeed();
           }
         }),
-        action((world) => resolveRound(world)),
+        action((world) => chantPhase(world)),
+        action((world) => fetchWaterPhase(world)),
+        action((world) => exchangePhase(world)),
+        action((world) => drinkPhase(world)),
+        action((world) => endOfRoundPhase(world)),
         action((world) => prepareNextRound(world)),
       ]),
     ),
diff --git a/examples/three-monks/random-playthrough.ts b/examples/three-monks/random-playthrough.ts
index 4c65aa2..81a189c 100644
--- a/examples/three-monks/random-playthrough.ts
+++ b/examples/three-monks/random-playthrough.ts
@@ -9,15 +9,14 @@ import {
 } from "./components";
 import {
   beginSelectionPhase,
-  checkWinner,
   collectProposals,
   prepareNextRound,
-  resolveChant,
-  resolveDrink,
-  resolveEndOfRoundTools,
-  resolveExchange,
-  resolveFetchWater,
   selectAction,
+  chantPhase,
+  fetchWaterPhase,
+  exchangePhase,
+  drinkPhase,
+  endOfRoundPhase,
 } from "./rules";
 import {
   ACTION_LABELS,
@@ -82,24 +81,13 @@ export function generateRandomPlayLog(
     const proposals = collectProposals(world);
     log.add(`  本轮行动阶段：${formatProposals(proposals)}`);
 
-    if (proposals.chant) {
-      applyLoggedPhase(log, world, "念经", () => resolveChant(world));
-    }
-    if (proposals.fetchWater) {
-      applyLoggedPhase(log, world, "挑水", () => resolveFetchWater(world));
-    }
-    if (proposals.exchange) {
-      applyLoggedPhase(log, world, "交换", () => resolveExchange(world));
-    }
-    if (proposals.drink) {
-      applyLoggedPhase(log, world, "喝水", () => resolveDrink(world));
-    }
+    applyLoggedPhase(log, world, "念经", () => chantPhase(world));
+    applyLoggedPhase(log, world, "挑水", () => fetchWaterPhase(world));
+    applyLoggedPhase(log, world, "交换", () => exchangePhase(world));
+    applyLoggedPhase(log, world, "喝水", () => drinkPhase(world));
     if (world.getSingleton(GameState).phase === "gameOver") break;
 
-    applyLoggedPhase(log, world, "轮末道具", () =>
-      resolveEndOfRoundTools(world),
-    );
-    checkWinner(world);
+    applyLoggedPhase(log, world, "轮末道具", () => endOfRoundPhase(world));
     if (world.getSingleton(GameState).phase === "gameOver") break;
 
     prepareNextRound(world);
diff --git a/examples/three-monks/rules.ts b/examples/three-monks/rules.ts
index 9489fdb..9130a08 100644
--- a/examples/three-monks/rules.ts
+++ b/examples/three-monks/rules.ts
@@ -83,19 +83,47 @@ export function collectProposals(world: World): RoundProposals {
   return proposals;
 }
 
-export function resolveRound(world: World, stats?: ToolEffectRecorder): void {
-  const state = world.getSingleton(GameState);
-  if (state.phase === "gameOver") return;
+function isProposed(world: World, kind: ActionKind): boolean {
+  for (const player of getPlayersInSeatOrder(world)) {
+    if (getSelectedAction(world, player) === kind) return true;
+  }
+  return false;
+}
 
-  state.phase = "resolving";
-  const proposals = collectProposals(world);
+function isGameOver(world: World): boolean {
+  return world.getSingleton(GameState).phase === "gameOver";
+}
 
-  if (proposals.chant) resolveChant(world, stats);
-  if (proposals.fetchWater) resolveFetchWater(world, stats);
-  if (proposals.exchange) resolveExchange(world, stats);
-  if (proposals.drink) resolveDrink(world, stats);
-  if (world.getSingleton(GameState).phase === "gameOver") return;
+// ── Phase wrappers (each checks proposal + gameOver, then delegates) ──
 
+export function chantPhase(world: World, stats?: ToolEffectRecorder): void {
+  if (isGameOver(world) || !isProposed(world, "chant")) return;
+  resolveChant(world, stats);
+}
+
+export function fetchWaterPhase(
+  world: World,
+  stats?: ToolEffectRecorder,
+): void {
+  if (isGameOver(world) || !isProposed(world, "fetchWater")) return;
+  resolveFetchWater(world, stats);
+}
+
+export function exchangePhase(world: World, stats?: ToolEffectRecorder): void {
+  if (isGameOver(world) || !isProposed(world, "exchange")) return;
+  resolveExchange(world, stats);
+}
+
+export function drinkPhase(world: World, stats?: ToolEffectRecorder): void {
+  if (isGameOver(world) || !isProposed(world, "drink")) return;
+  resolveDrink(world, stats);
+}
+
+export function endOfRoundPhase(
+  world: World,
+  stats?: ToolEffectRecorder,
+): void {
+  if (isGameOver(world)) return;
   resolveEndOfRoundTools(world, stats);
   checkWinner(world);
 }
diff --git a/examples/three-monks/simulate.ts b/examples/three-monks/simulate.ts
index e21543b..6af359f 100644
--- a/examples/three-monks/simulate.ts
+++ b/examples/three-monks/simulate.ts
@@ -5,21 +5,18 @@ import {
   Player,
   Table,
   setupGame,
-  getPlayersInSeatOrder,
   type ActionKind,
 } from "./components";
 import { ToolEffectStats, formatToolEffectSummaries } from "./stats";
 import {
   beginSelectionPhase,
-  checkWinner,
-  collectProposals,
   prepareNextRound,
-  resolveChant,
-  resolveDrink,
-  resolveEndOfRoundTools,
-  resolveExchange,
-  resolveFetchWater,
   selectAction,
+  chantPhase,
+  fetchWaterPhase,
+  exchangePhase,
+  drinkPhase,
+  endOfRoundPhase,
 } from "./rules";
 
 function mulberry32(seed: number): () => number {
@@ -75,16 +72,13 @@ function runSingleGame(seed: number, stats?: ToolEffectStats): GameStats {
       selectAction(world, player, action);
     }
 
-    const proposals = collectProposals(world);
-
-    if (proposals.chant) resolveChant(world, stats);
-    if (proposals.fetchWater) resolveFetchWater(world, stats);
-    if (proposals.exchange) resolveExchange(world, stats);
-    if (proposals.drink) resolveDrink(world, stats);
+    chantPhase(world, stats);
+    fetchWaterPhase(world, stats);
+    exchangePhase(world, stats);
+    drinkPhase(world, stats);
     if (world.getSingleton(GameState).phase === "gameOver") break;
 
-    resolveEndOfRoundTools(world, stats);
-    checkWinner(world);
+    endOfRoundPhase(world, stats);
     if (world.getSingleton(GameState).phase === "gameOver") break;
 
     prepareNextRound(world);
diff --git a/test/three-monks.test.ts b/test/three-monks.test.ts
index 2235629..346f7ba 100644
--- a/test/three-monks.test.ts
+++ b/test/three-monks.test.ts
@@ -1,6 +1,5 @@
 import { describe, expect, it } from "vitest";
 import { World, query, type Entity } from "../src/index";
-import { CommandQueue } from "../src/commands/index";
 import { generateRandomPlayLog } from "../examples/three-monks/random-playthrough";
 import {
   ActionCard,
@@ -18,10 +17,6 @@ import {
   type ActionKind,
   type ToolKind,
 } from "../examples/three-monks/components";
-import {
-  issueSelectAction,
-  registerCommands,
-} from "../examples/three-monks/commands";
 import { createThreeMonksFlow } from "../examples/three-monks/gameflow";
 import {
   prepareNextRound,
@@ -112,18 +107,17 @@ describe("Three Monks action selection", () => {
     expect(getSelectedAction(world, players[0])).toBe("rest");
   });
 
-  it("command selection notifies gameflow and completes the round once all players select", () => {
+  it("behavior tree completes a round after all players select", () => {
     const { world, players } = setup();
-    const commands = new CommandQueue(world);
     const flow = createThreeMonksFlow(world);
-    registerCommands(world, commands, flow);
 
     flow.start();
     flow.runner.tick();
 
     for (const player of players) {
-      issueSelectAction(world, player, "rest");
-      commands.execute();
+      selectAction(world, player, "rest");
+      flow.notifySelectionChanged();
+      flow.runner.tick();
     }
 
     for (const player of players) {