diff --git a/tui/internal/tui/gitactions.go b/tui/internal/tui/gitactions.go
index 3ba51c5..de235d5 100644
--- a/tui/internal/tui/gitactions.go
+++ b/tui/internal/tui/gitactions.go
@@ -14,6 +14,10 @@ import (
 
 type commitRunMsg struct{ err error }
 
+const commitSkill = "/generate-git-commit-message"
+
+const commitPrompt = commitSkill + "\n先加载这条技能，按它的格式根据当前未提交改动生成提交说明，再 git add 并 git commit。\n用 git status 和 git diff（含暂存区）看清改了什么。\n不要把本指令、按钮名或任何操作口令原样当作 commit message。\n没有改动就停下来，不要空提交。不要 push，不要改无关文件。"
+
 type mergePreviewResultMsg struct {
 	issueNumber int
 	result      git.MergePreviewResult
@@ -30,7 +34,7 @@ func commitRunCmd() tea.Cmd {
 			return commitRunMsg{err: err}
 		}
 		_, err = cc.SpawnClaude(ctx, cc.Opts{
-			Prompt:    "提交下代码",
+			Prompt:    commitPrompt,
 			Cwd:       root,
 			TimeoutMs: 30 * 60 * 1000,
 		})
diff --git a/tui/internal/tui/gitactions_test.go b/tui/internal/tui/gitactions_test.go
index 57604ab..d759987 100644
--- a/tui/internal/tui/gitactions_test.go
+++ b/tui/internal/tui/gitactions_test.go
@@ -184,3 +184,18 @@ func TestCommitRun_InFlightGuard(t *testing.T) {
 		t.Fatal("commitRunMsg must clear commitRunning")
 	}
 }
+
+func TestCommitPrompt_NotLiteralCommand(t *testing.T) {
+	if !strings.HasPrefix(commitPrompt, commitSkill+"\n") {
+		t.Fatalf("commitPrompt must start with %q, got %q", commitSkill, commitPrompt)
+	}
+	if commitPrompt == "提交下代码" {
+		t.Fatal("commitPrompt must not be the old literal command")
+	}
+	if !strings.Contains(commitPrompt, "不要把本指令") {
+		t.Errorf("commitPrompt should forbid using the instruction as the commit message, got %q", commitPrompt)
+	}
+	if !strings.Contains(commitPrompt, "git commit") {
+		t.Errorf("commitPrompt should ask for git commit, got %q", commitPrompt)
+	}
+}
diff --git a/vscode/src/cc/commitPrompt.test.ts b/vscode/src/cc/commitPrompt.test.ts
new file mode 100644
index 0000000..2c24a6d
--- /dev/null
+++ b/vscode/src/cc/commitPrompt.test.ts
@@ -0,0 +1,20 @@
+import { describe, expect, it } from 'vitest'
+import { COMMIT_PROMPT, COMMIT_SKILL } from './commitPrompt'
+
+describe('commit prompt', () => {
+  it('开头就是生成提交说明的技能命令', () => {
+    expect(COMMIT_SKILL).toBe('/generate-git-commit-message')
+    expect(COMMIT_PROMPT.startsWith(`${COMMIT_SKILL}\n`)).toBe(true)
+  })
+
+  it('不是「提交下代码」这种会被原样拿去当提交说明的短口令', () => {
+    expect(COMMIT_PROMPT).not.toBe('提交下代码')
+    expect(COMMIT_PROMPT).not.toContain('提交下代码')
+  })
+
+  it('要求按改动写提交说明，并禁止把指令本身当成 commit message', () => {
+    expect(COMMIT_PROMPT).toContain('git commit')
+    expect(COMMIT_PROMPT).toContain('不要把本指令')
+    expect(COMMIT_PROMPT).toContain('不要空提交')
+  })
+})
diff --git a/vscode/src/cc/commitPrompt.ts b/vscode/src/cc/commitPrompt.ts
new file mode 100644
index 0000000..bc3f663
--- /dev/null
+++ b/vscode/src/cc/commitPrompt.ts
@@ -0,0 +1,13 @@
+/**
+ * 工具栏「提交代码」发给 Claude 的一次性指令：先加载生成提交说明的技能，再按改动 commit。
+ * `--bare` 下技能仍靠 `/skill-name` 解析，所以第一行必须是技能命令。
+ */
+export const COMMIT_SKILL = '/generate-git-commit-message'
+
+export const COMMIT_PROMPT = [
+  COMMIT_SKILL,
+  '先加载这条技能，按它的格式根据当前未提交改动生成提交说明，再 git add 并 git commit。',
+  '用 git status 和 git diff（含暂存区）看清改了什么。',
+  '不要把本指令、按钮名或任何操作口令原样当作 commit message。',
+  '没有改动就停下来，不要空提交。不要 push，不要改无关文件。',
+].join('\n')
diff --git a/vscode/src/panel/handlers/toolbar.test.ts b/vscode/src/panel/handlers/toolbar.test.ts
new file mode 100644
index 0000000..f6a262e
--- /dev/null
+++ b/vscode/src/panel/handlers/toolbar.test.ts
@@ -0,0 +1,74 @@
+import type { KanbanWebviewPanel } from '../KanbanPanel'
+import { beforeEach, describe, expect, it, vi } from 'vitest'
+import { COMMIT_PROMPT } from '../../cc/commitPrompt'
+import { handleCommitRun } from './toolbar'
+
+const mocks = vi.hoisted(() => ({
+  spawnClaude: vi.fn(),
+  getEffectiveCommitProfilePath: vi.fn(),
+  resolveCommitProfileForRun: vi.fn(),
+  readGitIdentity: vi.fn(),
+  toast: vi.fn(),
+  dismiss: vi.fn(),
+}))
+
+vi.mock('vscode', () => ({
+  workspace: { workspaceFolders: [{ uri: { fsPath: '/repo' } }] },
+}))
+vi.mock('../../cc/commitProfile', () => ({
+  resolveCommitProfileForRun: (...args: unknown[]) => mocks.resolveCommitProfileForRun(...args),
+}))
+vi.mock('../../cc/profiles', () => ({ resolveProfilePath: (p: string) => p }))
+vi.mock('../../cc/spawnClaude', () => ({ spawnClaude: (...args: unknown[]) => mocks.spawnClaude(...args) }))
+vi.mock('../../git/identity', () => ({
+  missingGitIdentityKeys: (identity: { name: string, email: string }) => {
+    const missing: string[] = []
+    if (!identity.name.trim())
+      missing.push('user.name')
+    if (!identity.email.trim())
+      missing.push('user.email')
+    return missing
+  },
+  readGitIdentity: (...args: unknown[]) => mocks.readGitIdentity(...args),
+}))
+vi.mock('../../settings/store', () => ({
+  getEffectiveCommitProfilePath: (...args: unknown[]) => mocks.getEffectiveCommitProfilePath(...args),
+}))
+vi.mock('../../webview/html', () => ({ makeNonce: () => 'n1' }))
+vi.mock('./handoffFlow', () => ({
+  toast: (...args: unknown[]) => mocks.toast(...args),
+  dismiss: (...args: unknown[]) => mocks.dismiss(...args),
+}))
+vi.mock('../../logging/logger', () => ({ logger: { add: vi.fn() } }))
+vi.mock('../../files/envLock', () => ({ findEnvFiles: vi.fn(), lockEnvFiles: vi.fn(), unlockEnvFiles: vi.fn() }))
+vi.mock('../../git/gitExtension', () => ({ loadGitApi: vi.fn() }))
+
+function panel(): KanbanWebviewPanel {
+  return {
+    commitRunning: false,
+    context: {},
+    postMessage: vi.fn(),
+  } as unknown as KanbanWebviewPanel
+}
+
+beforeEach(() => {
+  vi.clearAllMocks()
+  mocks.getEffectiveCommitProfilePath.mockResolvedValue('/p/deepseek-v4-pro.json')
+  mocks.resolveCommitProfileForRun.mockReturnValue({ ok: true, profilePath: '/p/deepseek-v4-pro.json' })
+  mocks.readGitIdentity.mockResolvedValue({ name: 'me', email: 'me@example.com' })
+  mocks.spawnClaude.mockResolvedValue({ resultText: 'committed', sessionId: 's', rawJson: '{}' })
+  mocks.toast.mockReturnValue('toast-id')
+})
+
+describe('handleCommitRun', () => {
+  it('把写提交说明的指令交给 claude，不用「提交下代码」', async () => {
+    const p = panel()
+    await handleCommitRun(p)
+    expect(mocks.spawnClaude).toHaveBeenCalledOnce()
+    const args = mocks.spawnClaude.mock.calls[0][0] as { prompt: string, cwd: string, profilePath: string }
+    expect(args.prompt).toBe(COMMIT_PROMPT)
+    expect(args.prompt).not.toBe('提交下代码')
+    expect(args.cwd).toBe('/repo')
+    expect(args.profilePath).toBe('/p/deepseek-v4-pro.json')
+  })
+})
diff --git a/vscode/src/panel/handlers/toolbar.ts b/vscode/src/panel/handlers/toolbar.ts
index 588480c..0350105 100644
--- a/vscode/src/panel/handlers/toolbar.ts
+++ b/vscode/src/panel/handlers/toolbar.ts
@@ -4,6 +4,7 @@ import { accessSync, constants } from 'node:fs'
 import * as path from 'node:path'
 import { workspace } from 'vscode'
 import { resolveCommitProfileForRun } from '../../cc/commitProfile'
+import { COMMIT_PROMPT } from '../../cc/commitPrompt'
 import { resolveProfilePath } from '../../cc/profiles'
 import { spawnClaude } from '../../cc/spawnClaude'
 import { findEnvFiles, lockEnvFiles, unlockEnvFiles } from '../../files/envLock'
@@ -84,7 +85,7 @@ export async function handleCommitRun(panel: KanbanWebviewPanel): Promise<void>
     // claude -p 提交流程可能跑得比较久（要 git add / 编 commit message / git
     // commit），所以给一个比较宽松的超时（30 min）。
     const { resultText } = await spawnClaude({
-      prompt: '提交下代码',
+      prompt: COMMIT_PROMPT,
       cwd: workspaceRoot,
       profilePath: resolution.profilePath,
       timeoutMs: 30 * 60 * 1000,
diff --git a/vscode/webview-ui/src/hooks/useIssues.ts b/vscode/webview-ui/src/hooks/useIssues.ts
index 905843a..c0432a7 100644
--- a/vscode/webview-ui/src/hooks/useIssues.ts
+++ b/vscode/webview-ui/src/hooks/useIssues.ts
@@ -259,7 +259,7 @@ export interface UseIssuesResult {
    */
   commitRunning: boolean
   /**
-   * Trigger a background `claude -p "提交下代码"` run in the workspace
+   * Trigger a background Claude commit run in the workspace
    * root, gated by `commitRunning`. The extension responds with
    * `commit/state` messages and a `toast/show` on completion.
    */