diff --git a/internal/config/config.go b/internal/config/config.go
index 561efcd2..61ca9884 100644
--- a/internal/config/config.go
+++ b/internal/config/config.go
@@ -607,6 +607,8 @@ type AgentConfig struct {
 	ToolTimeoutMinutes int    `yaml:"tool_timeout_minutes" json:"tool_timeout_minutes"` // 单次工具执行最大时长（分钟），超时自动终止，防止长时间挂起；0 表示不限制（不推荐）
 	// ShellNoOutputTimeoutSeconds execute/exec 无任何 stdout/stderr 时的空闲终止秒数（通用防挂死，不维护命令黑名单）；0=默认 300（5 分钟）；-1=关闭。
 	ShellNoOutputTimeoutSeconds int `yaml:"shell_no_output_timeout_seconds" json:"shell_no_output_timeout_seconds"`
+	// WorkspaceRootDir 会话工作目录根路径（curl/wget 下载、read_file/glob/grep 本地分析）；空=tmp/workspace，其下按 projects/{id} 或 conversations/{id} 隔离。
+	WorkspaceRootDir string `yaml:"workspace_root_dir,omitempty" json:"workspace_root_dir,omitempty"`
 	// SystemPromptPath 单代理系统提示 Markdown/文本文件路径（相对 config.yaml 所在目录，或可写绝对路径）。非空且可读时替换内置单代理提示；留空用内置。
 	SystemPromptPath string `yaml:"system_prompt_path,omitempty" json:"system_prompt_path,omitempty"`
 }
diff --git a/internal/database/conversation.go b/internal/database/conversation.go
index 507a54ab..cf2d59d8 100644
--- a/internal/database/conversation.go
+++ b/internal/database/conversation.go
@@ -640,6 +640,16 @@ func (db *DB) einoReductionBaseDir() string {
 	return filepath.Join("tmp", "reduction")
 }
 
+func (db *DB) einoWorkspaceBaseDir() string {
+	if db == nil {
+		return ""
+	}
+	if base := strings.TrimSpace(db.einoWorkspaceRootDir); base != "" {
+		return base
+	}
+	return filepath.Join("tmp", "workspace")
+}
+
 func (db *DB) removeConversationScopedDirs(conversationID, projectID string) {
 	// summarization transcript, etc.
 	db.removeConversationScopedDir(db.conversationArtifactsDir, conversationID, "conversation_artifacts")
@@ -652,6 +662,8 @@ func (db *DB) removeConversationScopedDirs(conversationID, projectID string) {
 	if strings.TrimSpace(projectID) == "" {
 		reductionBase := filepath.Join(db.einoReductionBaseDir(), "conversations")
 		db.removeConversationScopedDir(reductionBase, conversationID, "reduction")
+		workspaceBase := filepath.Join(db.einoWorkspaceBaseDir(), "conversations")
+		db.removeConversationScopedDir(workspaceBase, conversationID, "workspace")
 	}
 }
 
@@ -659,6 +671,9 @@ func (db *DB) removeProjectScopedDirs(projectID string) {
 	// Eino reduction persisted tool outputs (tmp/reduction/projects/<id>/).
 	reductionBase := filepath.Join(db.einoReductionBaseDir(), "projects")
 	db.removeConversationScopedDir(reductionBase, projectID, "reduction")
+	// Agent download/analysis workspace (tmp/workspace/projects/<id>/).
+	workspaceBase := filepath.Join(db.einoWorkspaceBaseDir(), "projects")
+	db.removeConversationScopedDir(workspaceBase, projectID, "workspace")
 }
 
 // SaveAgentTrace 保存最后一轮代理消息轨迹与助手输出摘要。
diff --git a/internal/database/conversation_cleanup_test.go b/internal/database/conversation_cleanup_test.go
index 77e9cfe9..a2bc384d 100644
--- a/internal/database/conversation_cleanup_test.go
+++ b/internal/database/conversation_cleanup_test.go
@@ -20,7 +20,8 @@ func TestDeleteConversationRemovesEinoScopedDirs(t *testing.T) {
 	plantaskBase := filepath.Join(tmp, "skills", ".eino", "plantask")
 	checkpointBase := filepath.Join(tmp, "eino-checkpoints")
 	reductionBase := filepath.Join(tmp, "reduction")
-	db.SetEinoConversationDirs(plantaskBase, checkpointBase, reductionBase)
+	workspaceBase := filepath.Join(tmp, "workspace")
+	db.SetEinoConversationDirs(plantaskBase, checkpointBase, reductionBase, workspaceBase)
 
 	conv, err := db.CreateConversation("cleanup test", ConversationCreateMeta{})
 	if err != nil {
@@ -36,6 +37,7 @@ func TestDeleteConversationRemovesEinoScopedDirs(t *testing.T) {
 		{plantaskBase, "task-1.json"},
 		{checkpointBase, "runner-deep.ckpt"},
 		{filepath.Join(reductionBase, "conversations"), "tool-output.txt"},
+		{filepath.Join(workspaceBase, "conversations"), "page.html"},
 	} {
 		dir := filepath.Join(base.root, seg)
 		if err := os.MkdirAll(dir, 0o755); err != nil {
@@ -50,7 +52,7 @@ func TestDeleteConversationRemovesEinoScopedDirs(t *testing.T) {
 		t.Fatalf("DeleteConversation: %v", err)
 	}
 
-	for _, base := range []string{db.conversationArtifactsDir, plantaskBase, checkpointBase, filepath.Join(reductionBase, "conversations")} {
+	for _, base := range []string{db.conversationArtifactsDir, plantaskBase, checkpointBase, filepath.Join(reductionBase, "conversations"), filepath.Join(workspaceBase, "conversations")} {
 		dir := filepath.Join(base, seg)
 		if _, statErr := os.Stat(dir); !os.IsNotExist(statErr) {
 			t.Fatalf("expected removed dir %s, stat err=%v", dir, statErr)
@@ -68,7 +70,8 @@ func TestDeleteProjectRemovesReductionDir(t *testing.T) {
 	defer db.Close()
 
 	reductionBase := filepath.Join(tmp, "reduction")
-	db.SetEinoConversationDirs("", "", reductionBase)
+	workspaceBase := filepath.Join(tmp, "workspace")
+	db.SetEinoConversationDirs("", "", reductionBase, workspaceBase)
 
 	project, err := db.CreateProject(&Project{Name: "cleanup test"})
 	if err != nil {
@@ -82,6 +85,13 @@ func TestDeleteProjectRemovesReductionDir(t *testing.T) {
 	if err := os.WriteFile(filepath.Join(reductionDir, "call-1.txt"), []byte("x"), 0o644); err != nil {
 		t.Fatalf("write: %v", err)
 	}
+	workspaceDir := filepath.Join(workspaceBase, "projects", seg, "downloads")
+	if err := os.MkdirAll(workspaceDir, 0o755); err != nil {
+		t.Fatalf("mkdir %s: %v", workspaceDir, err)
+	}
+	if err := os.WriteFile(filepath.Join(workspaceDir, "app.js"), []byte("x"), 0o644); err != nil {
+		t.Fatalf("write workspace: %v", err)
+	}
 
 	if err := db.DeleteProject(project.ID); err != nil {
 		t.Fatalf("DeleteProject: %v", err)
@@ -91,4 +101,8 @@ func TestDeleteProjectRemovesReductionDir(t *testing.T) {
 	if _, statErr := os.Stat(projectReductionDir); !os.IsNotExist(statErr) {
 		t.Fatalf("expected removed dir %s, stat err=%v", projectReductionDir, statErr)
 	}
+	projectWorkspaceDir := filepath.Join(workspaceBase, "projects", seg)
+	if _, statErr := os.Stat(projectWorkspaceDir); !os.IsNotExist(statErr) {
+		t.Fatalf("expected removed dir %s, stat err=%v", projectWorkspaceDir, statErr)
+	}
 }
diff --git a/internal/database/database.go b/internal/database/database.go
index 55661e56..98e92425 100644
--- a/internal/database/database.go
+++ b/internal/database/database.go
@@ -52,6 +52,7 @@ type DB struct {
 	einoPlantaskBaseDir      string // skills_dir + plantask_rel_dir (per-conversation subdirs)
 	einoCheckpointBaseDir    string // checkpoint_dir root (per-conversation subdirs)
 	einoReductionRootDir     string // reduction_root_dir or default tmp/reduction (conversations/<id> subdirs)
+	einoWorkspaceRootDir     string // workspace_root_dir or default tmp/workspace (projects|conversations/<id> subdirs)
 	checkpointLoopName       string
 	checkpointStop           chan struct{}
 	checkpointDone           chan struct{}
@@ -161,13 +162,15 @@ func NewDB(dbPath string, logger *zap.Logger) (*DB, error) {
 // SetEinoConversationDirs configures best-effort filesystem cleanup on DeleteConversation.
 // plantaskBase is skills_root/plantask_rel (no conversation id); checkpointBase is checkpoint_dir root.
 // reductionRoot is reduction_root_dir from config; empty uses tmp/reduction (conversation-scoped subdirs only).
-func (db *DB) SetEinoConversationDirs(plantaskBase, checkpointBase, reductionRoot string) {
+// workspaceRoot is agent.workspace_root_dir from config; empty uses tmp/workspace.
+func (db *DB) SetEinoConversationDirs(plantaskBase, checkpointBase, reductionRoot, workspaceRoot string) {
 	if db == nil {
 		return
 	}
 	db.einoPlantaskBaseDir = strings.TrimSpace(plantaskBase)
 	db.einoCheckpointBaseDir = strings.TrimSpace(checkpointBase)
 	db.einoReductionRootDir = strings.TrimSpace(reductionRoot)
+	db.einoWorkspaceRootDir = strings.TrimSpace(workspaceRoot)
 }
 
 // initTables 初始化数据库表