diff --git a/src/workflows/roles/meta-checker.ts b/src/workflows/roles/meta-checker.ts
index 382c910..faba918 100644
--- a/src/workflows/roles/meta-checker.ts
+++ b/src/workflows/roles/meta-checker.ts
@@ -41,7 +41,7 @@ export function createMetaCheckerRole(opts: {
     let changedFiles: string[] = [];
     try {
       // Get all uncommitted changes + last commit changes
-      const diffOutput = exec('git diff --name-only HEAD~1 HEAD 2>/dev/null || git diff --name-only');
+      const diffOutput = exec('git diff --name-only HEAD 2>/dev/null || git diff --name-only');
       changedFiles = diffOutput.split('\n').filter(Boolean);
     } catch {
       // No git history — check working tree
diff --git a/src/workflows/roles/meta-gate.test.ts b/src/workflows/roles/meta-gate.test.ts
index 987011c..788e478 100644
--- a/src/workflows/roles/meta-gate.test.ts
+++ b/src/workflows/roles/meta-gate.test.ts
@@ -1,11 +1,10 @@
 /**
- * Meta Gate role tests.
+ * Meta Gate role tests — createMetaGateRole 的三项预检。
  *
  * 小橘 🍊 (NEKO Team)
  */
 
 import { describe, expect, it } from 'bun:test';
-import { tmpdir } from 'node:os';
 import { join } from 'node:path';
 import { fileURLToPath } from 'node:url';
 import type { WorkflowMessage } from '@uncaged/pulse';
@@ -25,47 +24,38 @@ function startChain(content: string): WorkflowMessage[] {
   ];
 }
 
-describe('meta-gate role', () => {
-  it('passes for a normal engine-scoped task', async () => {
+describe('createMetaGateRole', () => {
+  it('engine-dir-exists: pass when engineDir exists', async () => {
     const gate = createMetaGateRole({ engineDir: engineRoot });
     const r = await gate(
-      startChain('Add feature under src/workflows/foo.ts'),
+      startChain('Change src/workflows/foo.ts only'),
       't1',
       {} as any,
     );
-    expect(r.meta?.pass).toBe(true);
-    expect(r.meta?.checks?.every((c) => c.pass)).toBe(true);
+    const c = r.meta?.checks?.find((x) => x.name === 'engine-dir-exists');
+    expect(c?.pass).toBe(true);
   });
 
-  it('fails when task references core package path', async () => {
+  it('workflows-dir-exists: pass when src/workflows exists under engineDir', async () => {
+    const gate = createMetaGateRole({ engineDir: engineRoot });
+    const r = await gate(
+      startChain('Change src/workflows/foo.ts only'),
+      't1',
+      {} as any,
+    );
+    const c = r.meta?.checks?.find((x) => x.name === 'workflows-dir-exists');
+    expect(c?.pass).toBe(true);
+  });
+
+  it('no-core-package-paths: fail when prompt mentions core package path', async () => {
     const gate = createMetaGateRole({ engineDir: engineRoot });
     const r = await gate(
       startChain('Edit packages/pulse/src/store.ts'),
       't1',
       {} as any,
     );
+    const c = r.meta?.checks?.find((x) => x.name === 'no-core-package-paths');
+    expect(c?.pass).toBe(false);
     expect(r.meta?.pass).toBe(false);
-    expect(r.meta?.reason).toContain('packages/pulse/src/');
-  });
-
-  it('fails when engine directory does not exist', async () => {
-    const badDir = join(tmpdir(), `missing-engine-${Date.now()}`);
-    const gate = createMetaGateRole({ engineDir: badDir });
-    const r = await gate(
-      startChain('Only touch src/workflows/x.ts'),
-      't1',
-      {} as any,
-    );
-    expect(r.meta?.pass).toBe(false);
-    expect(r.meta?.checks?.some((c) => c.name === 'engine-dir-exists' && !c.pass)).toBe(
-      true,
-    );
-  });
-
-  it('fails when task content is empty', async () => {
-    const gate = createMetaGateRole({ engineDir: engineRoot });
-    const r = await gate(startChain('   '), 't1', {} as any);
-    expect(r.meta?.pass).toBe(false);
-    expect(r.meta?.reason).toBe('任务内容为空');
   });
 });