diff --git a/docs/CODEX_DESKTOP_SESSION_SYNC.md b/docs/CODEX_DESKTOP_SESSION_SYNC.md
new file mode 100644
index 0000000..698a9b2
--- /dev/null
+++ b/docs/CODEX_DESKTOP_SESSION_SYNC.md
@@ -0,0 +1,56 @@
+## Codex Desktop Session Sync Notes
+
+### Background
+
+When a Codex session was created from the mobile/browser UI, the session could run normally, but it did not always appear in the Codex Desktop sidebar for the corresponding project.
+
+### Symptoms
+
+- A browser-created session was persisted under `~/.codex/sessions/...`.
+- The same session was missing from the Codex Desktop sidebar, even though the session file existed.
+- This was reproducible with Windows projects whose real path contained non-ASCII characters.
+
+### Findings
+
+1. The mobile UI uses `server/openai-codex.js` to start Codex SDK threads.
+2. On Windows, non-ASCII project paths are redirected through an ASCII junction path such as `D:\codex_project_aliases\<sha1>`.
+3. The persisted `session_meta.payload.cwd` could therefore be written as the ASCII alias instead of the real project path.
+4. Even when `cwd` was already correct, mobile-created sessions were still written with `session_meta.payload.source = "exec"`.
+5. Codex Desktop sessions that were visible in the sidebar were written with `session_meta.payload.source = "vscode"`.
+
+### Root Cause
+
+There were two compatibility mismatches between mobile-created sessions and Codex Desktop sidebar indexing:
+
+- `session_meta.payload.cwd` could point to the temporary ASCII alias instead of the real workspace path.
+- `session_meta.payload.source` was written as `exec`, while Codex Desktop-visible sessions used `vscode`.
+
+### Fix
+
+`server/openai-codex.js` now performs a post-start metadata sync for the persisted session file:
+
+- Wait for the session file to appear under `~/.codex/sessions`.
+- Rewrite `session_meta.payload.cwd` back to the real requested project path when the persisted path matches the ASCII alias.
+- Rewrite `session_meta.payload.source` to `vscode` for Codex Desktop compatibility.
+
+The runtime behavior of the Codex SDK is unchanged:
+
+- The SDK can still execute from the ASCII alias path when needed.
+- Only the persisted session metadata is normalized for Codex Desktop.
+
+### Validation
+
+Use the following checks:
+
+1. Create a session from the mobile/browser UI.
+2. Confirm that the new session file under `~/.codex/sessions/...` has:
+   - the real project path in `session_meta.payload.cwd`
+   - `session_meta.payload.source = "vscode"`
+3. Refresh or restart Codex Desktop.
+4. Confirm that the session appears in the sidebar under the correct project.
+
+### Operational Notes
+
+- Existing historical sessions may still need a one-time metadata migration if they were created before this fix.
+- The runtime patch only affects newly created or resumed sessions after the updated server is deployed.
+- The change is intentionally local to `server/openai-codex.js` and does not alter the project discovery logic elsewhere.
diff --git a/docs/CODEX_DESKTOP_SESSION_SYNC.zh-CN.md b/docs/CODEX_DESKTOP_SESSION_SYNC.zh-CN.md
new file mode 100644
index 0000000..4a0e32d
--- /dev/null
+++ b/docs/CODEX_DESKTOP_SESSION_SYNC.zh-CN.md
@@ -0,0 +1,55 @@
+## Codex Desktop 会话同步说明
+
+### 背景
+
+当会话是从手机端或浏览器端创建时，Codex 实际可以正常运行，但这条会话不一定会出现在 Codex Desktop 对应项目的左侧线程列表里。
+
+### 现象
+
+- 浏览器新建的会话确实已经写入 `~/.codex/sessions/...`
+- 但 Codex Desktop 左侧列表里看不到它
+- 在 Windows 非 ASCII 项目路径下，这个问题可以稳定复现
+
+### 关键发现
+
+1. 手机端会话是通过 `server/openai-codex.js` 调用 Codex SDK 创建的。
+2. Windows 下如果项目路径包含非 ASCII 字符，会先切到一个 ASCII junction 路径，例如 `D:\codex_project_aliases\<sha1>`。
+3. 因此落盘时 `session_meta.payload.cwd` 可能被写成这个临时别名路径，而不是真实项目路径。
+4. 即使 `cwd` 本身就是对的，手机端新建的会话仍然会写成 `session_meta.payload.source = "exec"`。
+5. 在 Codex Desktop 左侧能正常显示的会话，`session_meta.payload.source` 则是 `vscode`。
+
+### 根因
+
+手机端新建会话和 Codex Desktop 左侧索引之间，至少存在两个兼容性差异：
+
+- `session_meta.payload.cwd` 可能落成 ASCII 别名路径，而不是实际工作目录
+- `session_meta.payload.source` 会被写成 `exec`，而 Codex Desktop 可见线程使用的是 `vscode`
+
+### 修复方式
+
+现在 `server/openai-codex.js` 会在会话启动后，对落盘的会话文件做一次元数据回写：
+
+- 等待 `~/.codex/sessions` 里对应会话文件出现
+- 如果 `cwd` 落成了 ASCII 别名路径，就改回真实项目路径
+- 把 `session_meta.payload.source` 统一改成 `vscode`，提升 Codex Desktop 侧边栏兼容性
+
+这个修复不会改变 Codex SDK 的实际运行方式：
+
+- 运行时仍然可以继续使用 ASCII 别名路径规避 Windows 非 ASCII 路径问题
+- 只是在落盘元数据这一层做兼容修正
+
+### 验证步骤
+
+1. 从手机端或浏览器端新建一个会话
+2. 检查 `~/.codex/sessions/...` 中对应文件的首条 `session_meta`
+3. 确认：
+   - `cwd` 已经是真实项目路径
+   - `source = "vscode"`
+4. 刷新或重启 Codex Desktop
+5. 确认左侧线程列表已经能在正确项目下看到该会话
+
+### 运行经验
+
+- 这次修复只保证“更新后的服务创建的新会话”自动兼容
+- 对于历史旧会话，必要时仍需要一次性元数据迁移
+- 整个修复被控制在 `server/openai-codex.js` 内部，没有扩散到项目发现逻辑或数据库层
diff --git a/upstream-overrides/claudecodeui-1.25.2/server/openai-codex.js b/upstream-overrides/claudecodeui-1.25.2/server/openai-codex.js
index 863dcac..4bf2471 100644
--- a/upstream-overrides/claudecodeui-1.25.2/server/openai-codex.js
+++ b/upstream-overrides/claudecodeui-1.25.2/server/openai-codex.js
@@ -16,11 +16,16 @@
 import { Codex } from '@openai/codex-sdk';
 import crypto from 'crypto';
 import { promises as fs } from 'fs';
+import os from 'os';
 import path from 'path';
 
 // Track active sessions
 const activeCodexSessions = new Map();
 const CODEX_ONLY_HARDENED_MODE = process.env.CODEX_ONLY_HARDENED_MODE !== 'false';
+const CODEX_SESSION_SYNC_TIMEOUT_MS = 5000;
+const CODEX_SESSION_SYNC_RETRY_MS = 250;
+// Codex Desktop groups sidebar threads using metadata from session_meta.
+const CODEX_APP_SESSION_SOURCE = 'vscode';
 
 const NON_ASCII_PATH_PATTERN = /[^\u0000-\u007F]/;
 
@@ -28,6 +33,19 @@ function containsNonAscii(value) {
   return typeof value === 'string' && NON_ASCII_PATH_PATTERN.test(value);
 }
 
+function normalizeComparablePath(value) {
+  if (typeof value !== 'string' || !value.trim()) {
+    return '';
+  }
+
+  const normalized = path.normalize(value.trim());
+  return process.platform === 'win32' ? normalized.toLowerCase() : normalized;
+}
+
+function sleep(ms) {
+  return new Promise(resolve => setTimeout(resolve, ms));
+}
+
 async function ensureAsciiWorkingDirectory(projectPath) {
   if (process.platform !== 'win32' || !containsNonAscii(projectPath)) {
     return projectPath;
@@ -60,6 +78,141 @@ async function ensureAsciiWorkingDirectory(projectPath) {
   return aliasPath;
 }
 
+async function findCodexSessionFile(sessionId, currentDir = path.join(os.homedir(), '.codex', 'sessions')) {
+  let entries;
+
+  try {
+    entries = await fs.readdir(currentDir, { withFileTypes: true });
+  } catch (error) {
+    if (error.code === 'ENOENT' || error.code === 'ENOTDIR') {
+      return null;
+    }
+    throw error;
+  }
+
+  for (const entry of entries) {
+    const fullPath = path.join(currentDir, entry.name);
+    if (entry.isDirectory()) {
+      const nestedMatch = await findCodexSessionFile(sessionId, fullPath);
+      if (nestedMatch) {
+        return nestedMatch;
+      }
+      continue;
+    }
+
+    if (entry.isFile() && entry.name.endsWith('.jsonl') && entry.name.includes(sessionId)) {
+      return fullPath;
+    }
+  }
+
+  return null;
+}
+
+async function rewriteCodexSessionMetadata(
+  sessionFilePath,
+  aliasWorkingDirectory,
+  requestedWorkingDirectory,
+  desiredSource = null
+) {
+  const fileContent = await fs.readFile(sessionFilePath, 'utf8');
+  const newline = fileContent.includes('\r\n') ? '\r\n' : '\n';
+  const lines = fileContent.split(/\r?\n/);
+  const normalizedAliasPath = normalizeComparablePath(aliasWorkingDirectory);
+  const normalizedRequestedPath = normalizeComparablePath(requestedWorkingDirectory);
+  let foundSessionMeta = false;
+  let changed = false;
+
+  for (let index = 0; index < lines.length; index += 1) {
+    const line = lines[index];
+    if (!line.trim()) {
+      continue;
+    }
+
+    let entry;
+    try {
+      entry = JSON.parse(line);
+    } catch {
+      continue;
+    }
+
+    if (entry.type !== 'session_meta' || !entry.payload) {
+      continue;
+    }
+    foundSessionMeta = true;
+
+    const persistedPath = normalizeComparablePath(entry.payload.cwd);
+    if (
+      normalizedRequestedPath &&
+      persistedPath !== normalizedRequestedPath &&
+      persistedPath === normalizedAliasPath
+    ) {
+      entry.payload.cwd = requestedWorkingDirectory;
+      changed = true;
+    }
+
+    if (desiredSource && entry.payload.source !== desiredSource) {
+      entry.payload.source = desiredSource;
+      changed = true;
+    }
+
+    if (!changed) {
+      return { found: true, updated: false };
+    }
+
+    lines[index] = JSON.stringify(entry);
+    await fs.writeFile(sessionFilePath, lines.join(newline), 'utf8');
+    return { found: true, updated: true };
+  }
+
+  return { found: foundSessionMeta, updated: false };
+}
+
+async function syncCodexSessionMetadata(
+  sessionId,
+  aliasWorkingDirectory,
+  requestedWorkingDirectory,
+  desiredSource = null
+) {
+  if (!sessionId) {
+    return false;
+  }
+
+  const deadline = Date.now() + CODEX_SESSION_SYNC_TIMEOUT_MS;
+  while (Date.now() <= deadline) {
+    const sessionFilePath = await findCodexSessionFile(sessionId);
+    if (!sessionFilePath) {
+      await sleep(CODEX_SESSION_SYNC_RETRY_MS);
+      continue;
+    }
+
+    try {
+      const syncResult = await rewriteCodexSessionMetadata(
+        sessionFilePath,
+        aliasWorkingDirectory,
+        requestedWorkingDirectory,
+        desiredSource
+      );
+
+      if (syncResult.updated) {
+        console.log(
+          '[Codex] Synced persisted session metadata:',
+          requestedWorkingDirectory,
+          desiredSource || '(source unchanged)',
+          'for',
+          sessionId
+        );
+      }
+      return syncResult.found;
+    } catch (error) {
+      console.warn('[Codex] Failed to sync persisted session metadata for', sessionId, error);
+      return false;
+    }
+  }
+
+  console.warn('[Codex] Timed out waiting for persisted session metadata for', sessionId);
+  return false;
+}
+
 /**
  * Transform Codex SDK event to WebSocket message format
  * @param {object} event - SDK event
@@ -250,6 +403,7 @@ export async function queryCodex(command, options = {}, ws) {
   let thread;
   let currentSessionId = sessionId;
   const abortController = new AbortController();
+  let sessionMetadataSyncPromise = null;
 
   try {
     // Initialize Codex SDK
@@ -273,6 +427,12 @@ export async function queryCodex(command, options = {}, ws) {
 
     // Get the thread ID
     currentSessionId = thread.id || sessionId || `codex-${Date.now()}`;
+    sessionMetadataSyncPromise = syncCodexSessionMetadata(
+      currentSessionId,
+      workingDirectory,
+      requestedWorkingDirectory,
+      CODEX_APP_SESSION_SOURCE
+    );
 
     // Track the session
     activeCodexSessions.set(currentSessionId, {
@@ -352,6 +512,14 @@ export async function queryCodex(command, options = {}, ws) {
     }
 
   } finally {
+    if (sessionMetadataSyncPromise) {
+      try {
+        await sessionMetadataSyncPromise;
+      } catch (error) {
+        console.warn('[Codex] Session metadata sync promise rejected for', currentSessionId, error);
+      }
+    }
+
     // Update session status
     if (currentSessionId) {
       const session = activeCodexSessions.get(currentSessionId);