diff --git a/apps/ai-game-creator-shell/src/App.tsx b/apps/ai-game-creator-shell/src/App.tsx
index ee075cfa5..5bf3330e9 100644
--- a/apps/ai-game-creator-shell/src/App.tsx
+++ b/apps/ai-game-creator-shell/src/App.tsx
@@ -605,16 +605,20 @@ function isPersistableDirectCodexConversationMessage(message: ChatMessage) {
   return /^[a-z0-9][a-z0-9-]{5,159}$/iu.test(turnId);
 }
 
-function claimInitialSupervisorMessageForPage(projectPath: string) {
+function claimInitialSupervisorMessageForPage(
+  projectPath: string,
+  messageKey = '',
+) {
   let claimedProjectPaths = initialSupervisorMessageClaimsByPage.get(window);
   if (!claimedProjectPaths) {
     claimedProjectPaths = new Set<string>();
     initialSupervisorMessageClaimsByPage.set(window, claimedProjectPaths);
   }
-  if (claimedProjectPaths.has(projectPath)) {
+  const claimKey = `${projectPath}\u0000${messageKey}`;
+  if (claimedProjectPaths.has(claimKey)) {
     return false;
   }
-  claimedProjectPaths.add(projectPath);
+  claimedProjectPaths.add(claimKey);
   return true;
 }
 
@@ -7501,7 +7505,7 @@ export function App({
     }
     if (
       chatAgentBusy ||
-      !claimInitialSupervisorMessageForPage(latch.projectPath)
+      !claimInitialSupervisorMessageForPage(latch.projectPath, latch.prompt)
     ) {
       return;
     }
diff --git a/apps/ai-game-creator-shell/src/features/app-shell/WorkspaceLauncher.tsx b/apps/ai-game-creator-shell/src/features/app-shell/WorkspaceLauncher.tsx
index 4727bf323..8b64a4505 100644
--- a/apps/ai-game-creator-shell/src/features/app-shell/WorkspaceLauncher.tsx
+++ b/apps/ai-game-creator-shell/src/features/app-shell/WorkspaceLauncher.tsx
@@ -495,6 +495,9 @@ export function WorkspaceLauncherShell({
     });
   }
 
+  const approvedDesignBuildPrompt =
+    '查看当前项目 design_artifacts/ 目录及其子目录下的文档，理解其游戏设计，并按照这些文档将游戏实现出来。';
+
   const currentHelpTitle =
     launcherView === 'guide'
       ? '使用指南'
@@ -661,14 +664,18 @@ export function WorkspaceLauncherShell({
                   initialProjectManifest={currentProjectContext.manifest}
                   initialProjectKind={currentProjectContext.projectKind}
                   initialSupervisorMessage={
-                    !suppressInitialGameTurn
-                      ? currentProjectContext.initialPrompt
-                      : ''
+                    switchedToGameRuntime
+                      ? approvedDesignBuildPrompt
+                      : !suppressInitialGameTurn
+                        ? currentProjectContext.initialPrompt
+                        : ''
                   }
                   initialCreationType={
-                    !suppressInitialGameTurn
-                      ? currentProjectContext.creationType
-                      : null
+                    switchedToGameRuntime
+                      ? 'game'
+                      : !suppressInitialGameTurn
+                        ? currentProjectContext.creationType
+                        : null
                   }
                   initialAttachments={
                     !suppressInitialGameTurn