diff --git a/packages/core/src/session/storage.ts b/packages/core/src/session/storage.ts
index 99a6a2f..4d5ada9 100644
--- a/packages/core/src/session/storage.ts
+++ b/packages/core/src/session/storage.ts
@@ -83,29 +83,42 @@ export class SessionStorage {
     const projectId = await getProjectId(workdir);
     const projectFile = path.join(this.projectDir, `${projectId}.json`);
 
-    using _ = await Lock.read(projectFile);
+    // 先尝试读取（只需读锁）
+    {
+      using _ = await Lock.read(projectFile);
+      try {
+        const content = await fs.readFile(projectFile, 'utf-8');
+        return JSON.parse(content) as ProjectMetadata;
+      } catch {
+        // 项目不存在，需要创建
+      }
+    }
 
+    // 读锁已释放，获取写锁来创建项目
+    using _ = await Lock.write(projectFile);
+
+    // 双重检查：可能其他进程已经创建了
     try {
       const content = await fs.readFile(projectFile, 'utf-8');
       return JSON.parse(content) as ProjectMetadata;
     } catch {
-      // 项目不存在，创建新项目
-      const isGitRepo = await isGitRepository(workdir);
-      const project: ProjectMetadata = {
-        id: projectId,
-        workdir,
-        createdAt: new Date().toISOString(),
-        isGitRepo,
-      };
-
-      using __ = await Lock.write(projectFile);
-      await fs.writeFile(projectFile, JSON.stringify(project, null, 2), 'utf-8');
-
-      // 确保项目的会话目录存在
-      await fs.mkdir(path.join(this.sessionDir, projectId), { recursive: true });
-
-      return project;
+      // 确实不存在，创建新项目
     }
+
+    const isGitRepo = await isGitRepository(workdir);
+    const project: ProjectMetadata = {
+      id: projectId,
+      workdir,
+      createdAt: new Date().toISOString(),
+      isGitRepo,
+    };
+
+    await fs.writeFile(projectFile, JSON.stringify(project, null, 2), 'utf-8');
+
+    // 确保项目的会话目录存在
+    await fs.mkdir(path.join(this.sessionDir, projectId), { recursive: true });
+
+    return project;
   }
 
   // ========== 会话元数据管理 ==========