diff --git a/src-tauri/src/commands/workspace_cmd.rs b/src-tauri/src/commands/workspace_cmd.rs
index 9746ade07..5d36d577d 100644
--- a/src-tauri/src/commands/workspace_cmd.rs
+++ b/src-tauri/src/commands/workspace_cmd.rs
@@ -13,7 +13,9 @@
 
 use crate::database::DbConnection;
 use crate::models::project_model::ProjectContext;
-use crate::services::workspace_health_service::ensure_workspace_root_ready;
+use crate::services::workspace_health_service::{
+    ensure_workspace_ready_with_auto_relocate, ensure_workspace_root_ready,
+};
 use crate::workspace::{
     Workspace, WorkspaceManager, WorkspaceSettings, WorkspaceType, WorkspaceUpdate,
 };
@@ -85,6 +87,9 @@ pub struct WorkspaceEnsureResult {
     pub existed: bool,
     pub created: bool,
     pub repaired: bool,
+    pub relocated: bool,
+    pub previous_root_path: Option<String>,
+    pub warning: Option<String>,
 }
 
 impl From<Workspace> for WorkspaceListItem {
@@ -200,12 +205,12 @@ pub async fn workspace_update(
 
     let new_root_path = if let Some(ref path_str) = request.root_path {
         let path = PathBuf::from(path_str);
-        // 预校验新路径：路径必须存在且为目录
-        if !path.exists() {
-            return Err(format!("指定的路径不存在: {path_str}"));
-        }
-        if !path.is_dir() {
-            return Err(format!("指定的路径不是目录: {path_str}"));
+        let created = ensure_workspace_root_ready(&path)?;
+        if created {
+            tracing::warn!(
+                "[Workspace] 更新路径时检测到目录缺失，已自动创建: {}",
+                path.to_string_lossy()
+            );
         }
         Some(path)
     } else {
@@ -277,23 +282,31 @@ pub async fn workspace_ensure_ready(
     let workspace = manager
         .get(&id)?
         .ok_or_else(|| format!("Workspace 不存在: {id}"))?;
-    let root_path = workspace.root_path.to_string_lossy().to_string();
+    let ensured = ensure_workspace_ready_with_auto_relocate(&manager, &workspace)?;
+    let root_path = ensured.root_path.to_string_lossy().to_string();
+    let previous_root_path = ensured
+        .previous_root_path
+        .as_ref()
+        .map(|path| path.to_string_lossy().to_string());
 
-    let created = ensure_workspace_root_ready(&workspace.root_path)?;
-    if created {
+    if ensured.repaired {
         tracing::warn!(
-            "[Workspace] 检测到目录缺失，已自动创建: id={}, root={}",
+            "[Workspace] 检测到目录异常并已修复: id={}, root={}, relocated={}",
             workspace.id,
-            root_path
+            root_path,
+            ensured.relocated
         );
     }
 
     Ok(WorkspaceEnsureResult {
         workspace_id: workspace.id,
         root_path,
-        existed: !created,
-        created,
-        repaired: created,
+        existed: ensured.existed,
+        created: ensured.created,
+        repaired: ensured.repaired,
+        relocated: ensured.relocated,
+        previous_root_path,
+        warning: ensured.warning,
     })
 }
 
@@ -306,21 +319,29 @@ pub async fn workspace_ensure_default_ready(
     let Some(workspace) = manager.get_default()? else {
         return Ok(None);
     };
-    let root_path = workspace.root_path.to_string_lossy().to_string();
-    let created = ensure_workspace_root_ready(&workspace.root_path)?;
-    if created {
+    let ensured = ensure_workspace_ready_with_auto_relocate(&manager, &workspace)?;
+    let root_path = ensured.root_path.to_string_lossy().to_string();
+    let previous_root_path = ensured
+        .previous_root_path
+        .as_ref()
+        .map(|path| path.to_string_lossy().to_string());
+    if ensured.repaired {
         tracing::warn!(
-            "[Workspace] 启动检查发现默认 workspace 目录缺失，已自动创建: id={}, root={}",
+            "[Workspace] 启动检查发现默认 workspace 目录异常并已修复: id={}, root={}, relocated={}",
             workspace.id,
-            root_path
+            root_path,
+            ensured.relocated
         );
     }
     Ok(Some(WorkspaceEnsureResult {
         workspace_id: workspace.id,
         root_path,
-        existed: !created,
-        created,
-        repaired: created,
+        existed: ensured.existed,
+        created: ensured.created,
+        repaired: ensured.repaired,
+        relocated: ensured.relocated,
+        previous_root_path,
+        warning: ensured.warning,
     }))
 }
 
@@ -375,9 +396,8 @@ pub async fn get_or_create_default_project(
     // 不存在则创建默认项目
     let default_project_path = get_workspace_projects_root_dir()?.join("default");
 
-    std::fs::create_dir_all(&default_project_path).map_err(|e| {
-        format!("创建默认项目目录失败: {e}")
-    })?;
+    std::fs::create_dir_all(&default_project_path)
+        .map_err(|e| format!("创建默认项目目录失败: {e}"))?;
 
     let workspace = manager.create_with_type(
         "默认项目".to_string(),
diff --git a/src-tauri/src/services/workspace_health_service.rs b/src-tauri/src/services/workspace_health_service.rs
index bf5b33e2a..f159c170d 100644
--- a/src-tauri/src/services/workspace_health_service.rs
+++ b/src-tauri/src/services/workspace_health_service.rs
@@ -1,4 +1,16 @@
-use std::path::Path;
+use crate::workspace::{Workspace, WorkspaceManager, WorkspaceUpdate};
+use std::path::{Path, PathBuf};
+
+#[derive(Debug, Clone)]
+pub struct WorkspaceReadyResult {
+    pub root_path: PathBuf,
+    pub existed: bool,
+    pub created: bool,
+    pub repaired: bool,
+    pub relocated: bool,
+    pub previous_root_path: Option<PathBuf>,
+    pub warning: Option<String>,
+}
 
 /// 确保 workspace 根目录可用。
 ///
@@ -41,3 +53,102 @@ pub fn ensure_workspace_root_ready(workspace_root: &Path) -> Result<bool, String
 
     Ok(true)
 }
+
+pub fn ensure_workspace_ready_with_auto_relocate(
+    manager: &WorkspaceManager,
+    workspace: &Workspace,
+) -> Result<WorkspaceReadyResult, String> {
+    let original_root = workspace.root_path.clone();
+
+    match ensure_workspace_root_ready(&original_root) {
+        Ok(created) => {
+            return Ok(WorkspaceReadyResult {
+                root_path: original_root,
+                existed: !created,
+                created,
+                repaired: created,
+                relocated: false,
+                previous_root_path: None,
+                warning: None,
+            });
+        }
+        Err(primary_error) => {
+            let fallback_root = build_workspace_fallback_root(workspace)?;
+            if fallback_root == original_root {
+                return Err(primary_error);
+            }
+
+            let fallback_created =
+                ensure_workspace_root_ready(&fallback_root).map_err(|fallback_error| {
+                    format!("{primary_error}；自动迁移到托管目录失败: {fallback_error}")
+                })?;
+
+            manager
+                .update(
+                    &workspace.id,
+                    WorkspaceUpdate {
+                        root_path: Some(fallback_root.clone()),
+                        ..WorkspaceUpdate::default()
+                    },
+                )
+                .map_err(|error| format!("Workspace 自动迁移后更新配置失败: {error}"))?;
+
+            let warning = format!(
+                "Workspace 原路径不可用，已自动迁移到托管目录: {} -> {}",
+                original_root.display(),
+                fallback_root.display()
+            );
+
+            tracing::warn!(
+                "[WorkspaceHealth] {} (workspace_id={})",
+                warning,
+                workspace.id
+            );
+
+            Ok(WorkspaceReadyResult {
+                root_path: fallback_root,
+                existed: !fallback_created,
+                created: fallback_created,
+                repaired: true,
+                relocated: true,
+                previous_root_path: Some(original_root),
+                warning: Some(warning),
+            })
+        }
+    }
+}
+
+fn build_workspace_fallback_root(workspace: &Workspace) -> Result<PathBuf, String> {
+    let home_dir = dirs::home_dir().ok_or_else(|| "无法获取主目录".to_string())?;
+    let recovered_root = home_dir
+        .join(".proxycast")
+        .join("projects")
+        .join("recovered");
+    let workspace_name = sanitize_path_segment(&workspace.name);
+    let short_id: String = workspace.id.chars().take(8).collect();
+    let dir_name = if short_id.is_empty() {
+        workspace_name
+    } else {
+        format!("{}-{}", workspace_name, short_id)
+    };
+    Ok(recovered_root.join(dir_name))
+}
+
+fn sanitize_path_segment(raw: &str) -> String {
+    let sanitized: String = raw
+        .trim()
+        .chars()
+        .map(|ch| match ch {
+            '/' | '\\' | ':' | '*' | '?' | '"' | '<' | '>' | '|' => '_',
+            _ if ch.is_control() => '_',
+            _ => ch,
+        })
+        .collect();
+
+    let trimmed = sanitized.trim().trim_matches('.').to_string();
+    if trimmed.is_empty() {
+        "workspace".to_string()
+    } else {
+        trimmed
+    }
+}
diff --git a/src/components/agent/chat/index.tsx b/src/components/agent/chat/index.tsx
index c4e99c3b6..bd70938a2 100644
--- a/src/components/agent/chat/index.tsx
+++ b/src/components/agent/chat/index.tsx
@@ -469,11 +469,11 @@ export function AgentChatPage({
     const normalizedId = normalizeProjectId(projectId);
     if (!normalizedId) return;
 
-    invoke<{ created: boolean; rootPath: string }>("workspace_ensure_ready", {
+    invoke<{ created: boolean; repaired: boolean; rootPath: string }>("workspace_ensure_ready", {
       id: normalizedId,
     })
-      .then(({ created, rootPath }) => {
-        if (created) {
+      .then(({ repaired, rootPath }) => {
+        if (repaired) {
           recordWorkspaceRepair({
             workspaceId: normalizedId,
             rootPath,
diff --git a/src/hooks/useProjects.ts b/src/hooks/useProjects.ts
index 7780666f2..b417e1da4 100644
--- a/src/hooks/useProjects.ts
+++ b/src/hooks/useProjects.ts
@@ -21,6 +21,9 @@ interface WorkspaceEnsureResult {
   existed: boolean;
   created: boolean;
   repaired: boolean;
+  relocated?: boolean;
+  previousRootPath?: string | null;
+  warning?: string | null;
 }
 // WorkspaceType 用于类型定义，暂未使用
 // import type { WorkspaceType } from '@/types/workspace';
@@ -79,7 +82,7 @@ export function useProjects(): UseProjectsReturn {
           "workspace_ensure_ready",
           { id: defaultProj.id },
         );
-        if (ensureResult.created) {
+        if (ensureResult.repaired) {
           recordWorkspaceRepair({
             workspaceId: ensureResult.workspaceId,
             rootPath: ensureResult.rootPath,
diff --git a/src/hooks/useWorkspace.ts b/src/hooks/useWorkspace.ts
index c4717c797..47671fe50 100644
--- a/src/hooks/useWorkspace.ts
+++ b/src/hooks/useWorkspace.ts
@@ -71,6 +71,9 @@ interface WorkspaceEnsureResult {
   existed: boolean;
   created: boolean;
   repaired: boolean;
+  relocated?: boolean;
+  previousRootPath?: string | null;
+  warning?: string | null;
 }
 
 /**
@@ -103,7 +106,7 @@ export function useWorkspace(): UseWorkspaceReturn {
           "workspace_ensure_ready",
           { id: defaultWs.id },
         );
-        if (ensureResult.created) {
+        if (ensureResult.repaired) {
           recordWorkspaceRepair({
             workspaceId: ensureResult.workspaceId,
             rootPath: ensureResult.rootPath,
@@ -165,7 +168,7 @@ export function useWorkspace(): UseWorkspaceReturn {
         "workspace_ensure_ready",
         { id },
       );
-      if (ensureResult.created) {
+      if (ensureResult.repaired) {
         recordWorkspaceRepair({
           workspaceId: ensureResult.workspaceId,
           rootPath: ensureResult.rootPath,