diff --git a/.gitignore b/.gitignore
index 344937d9..59fa2c7c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -100,6 +100,7 @@ tmp/
 
 # Documentation
 docs/_build/
+docs/tmp
 site/
 
 # Node.js (TUI)
diff --git a/webui/src/components/common/CommandDropdown.test.ts b/webui/src/components/common/CommandDropdown.test.ts
new file mode 100644
index 00000000..ab1b57a9
--- /dev/null
+++ b/webui/src/components/common/CommandDropdown.test.ts
@@ -0,0 +1,17 @@
+import { describe, expect, it } from 'vitest';
+import { parseSlashCommand } from './CommandDropdown';
+
+describe('parseSlashCommand', () => {
+  it('parses normal slash commands', () => {
+    expect(parseSlashCommand('/help')).toEqual({ command: 'help', args: '' });
+    expect(parseSlashCommand('/plan build the thing')).toEqual({
+      command: 'plan',
+      args: 'build the thing',
+    });
+  });
+
+  it('does not treat absolute filesystem paths as commands', () => {
+    expect(parseSlashCommand('/tmp/workspace/workflow.md')).toBeNull();
+    expect(parseSlashCommand('/tmp/rex_integration_guide.md\n\nuse this')).toBeNull();
+  });
+});
diff --git a/webui/src/components/common/CommandDropdown.tsx b/webui/src/components/common/CommandDropdown.tsx
index 11499610..2138ce0f 100644
--- a/webui/src/components/common/CommandDropdown.tsx
+++ b/webui/src/components/common/CommandDropdown.tsx
@@ -89,16 +89,21 @@ export default function CommandDropdown({
  * 从输入文本中解析 slash 命令的名称和参数
  * 例如 "/plan create a feature" → { command: "plan", args: "create a feature" }
  */
+export function isSlashCommandName(command: string): boolean {
+  return command.length > 0 && !/[\\/]/.test(command);
+}
+
 export function parseSlashCommand(text: string): { command: string; args: string } | null {
   const trimmed = text.trim();
   if (!trimmed.startsWith('/')) return null;
   const withoutSlash = trimmed.slice(1);
   const spaceIndex = withoutSlash.indexOf(' ');
-  if (spaceIndex === -1) {
-    return { command: withoutSlash, args: '' };
+  const command = spaceIndex === -1 ? withoutSlash : withoutSlash.slice(0, spaceIndex);
+  if (!isSlashCommandName(command)) {
+    return null;
   }
   return {
-    command: withoutSlash.slice(0, spaceIndex),
-    args: withoutSlash.slice(spaceIndex + 1).trim(),
+    command,
+    args: spaceIndex === -1 ? '' : withoutSlash.slice(spaceIndex + 1).trim(),
   };
 }
diff --git a/webui/src/components/common/SessionChat.test.ts b/webui/src/components/common/SessionChat.test.ts
index e26218a3..ab9a8f6c 100644
--- a/webui/src/components/common/SessionChat.test.ts
+++ b/webui/src/components/common/SessionChat.test.ts
@@ -1,5 +1,5 @@
 import React from 'react';
-import { render, screen, waitFor } from '@testing-library/react';
+import { fireEvent, render, screen, waitFor } from '@testing-library/react';
 import userEvent from '@testing-library/user-event';
 import { beforeEach, describe, expect, it, vi } from 'vitest';
 
@@ -461,6 +461,32 @@ describe('SessionChat agent mentions', () => {
   });
 });
 
+describe('SessionChat slash command routing', () => {
+  it('sends absolute filesystem paths as normal prompts instead of slash commands', async () => {
+    render(React.createElement(SessionChat, {
+      sessionId: 'sess-1',
+    }));
+
+    const text = '/tmp/stream_alert_denoise/rex_integration_guide.md\n\nuse this file';
+    const textarea = screen.getByPlaceholderText('请输入消息') as HTMLTextAreaElement;
+    fireEvent.change(textarea, { target: { value: text } });
+    fireEvent.keyDown(textarea, { key: 'Enter', code: 'Enter' });
+
+    await waitFor(() => {
+      expect(clientPostMock).toHaveBeenCalledWith(
+        '/api/session/sess-1/prompt_async',
+        expect.objectContaining({
+          parts: [{ type: 'text', text }],
+        }),
+      );
+    });
+    expect(clientPostMock).not.toHaveBeenCalledWith(
+      '/api/session/sess-1/command',
+      expect.anything(),
+    );
+  });
+});
+
 describe('truncateToolDisplayText', () => {
   it('returns short text unchanged', () => {
     expect(truncateToolDisplayText('bash')).toBe('bash');
diff --git a/webui/src/components/common/SessionChat.tsx b/webui/src/components/common/SessionChat.tsx
index fe648e24..799f94e8 100644
--- a/webui/src/components/common/SessionChat.tsx
+++ b/webui/src/components/common/SessionChat.tsx
@@ -23,7 +23,7 @@ import { useTranslation } from 'react-i18next';
 import LoadingSpinner from './LoadingSpinner';
 import { QuestionTool } from './QuestionTool';
 import DelegateTaskCard, { isDelegateTool, shouldRenderDelegateTaskCard } from './DelegateTaskCard';
-import CommandDropdown, { parseSlashCommand } from './CommandDropdown';
+import CommandDropdown, { isSlashCommandName, parseSlashCommand } from './CommandDropdown';
 import ImageLightbox from './ImageLightbox';
 import { useSessionMessages } from '@/hooks/useSessions';
 import { useSSE, type SSEConnectionStatus } from '@/hooks/useSSE';
@@ -2415,15 +2415,20 @@ export default function SessionChat({
                       const cursor = e.target.selectionStart ?? val.length;
                       const mention = mentionAgents.length > 0 ? findMentionTrigger(val, cursor) : null;
                       const trimmed = val.trimStart();
+                      const slashQuery = trimmed.startsWith('/') ? trimmed.slice(1) : '';
                       if (mention && !trimmed.startsWith('/')) {
                         setMentionRange({ start: mention.start, end: mention.end });
                         setMentionQuery(mention.query);
                         setSelectedMentionIndex(0);
                         setShowCommandDropdown(false);
-                      } else if (trimmed.startsWith('/') && !trimmed.includes(' ') && successfulAttachments.length === 0) {
+                      } else if (
+                        trimmed.startsWith('/') &&
+                        !trimmed.includes(' ') &&
+                        (slashQuery === '' || isSlashCommandName(slashQuery)) &&
+                        successfulAttachments.length === 0
+                      ) {
                         void loadCommandsIfNeeded();
-                        const q = trimmed.slice(1);
-                        setCommandQuery(q);
+                        setCommandQuery(slashQuery);
                         setSelectedCommandIndex(0);
                         setShowCommandDropdown(true);
                         setMentionRange(null);