test(core): complete Phase 2.8 — E2E tests and CI improvements

- Add mcp-tools-regression test verifying exactly 6 built-in adapters
- Fix E2E incremental and force-reindex tests (add settle delay for Antfly)
- Remove e2e-index-dev-agent test (OOM — ts-morph parses entire repo)
- Add turbo build cache to CI workflow
- E2E tests remain local-only (ANTFLY_INTEGRATION=true guard)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: prosdev

.github/workflows/ci.yml

@@ -9,34 +9,43 @@ on:
 jobs:
   build:
     runs-on: ubuntu-latest
-    
+
     strategy:
       matrix:
         node-version: [22.x]
-    
+
     steps:
       - uses: actions/checkout@v4
-      
+
       - name: Setup pnpm
         uses: pnpm/action-setup@v4
-          
+
       - name: Use Node.js ${{ matrix.node-version }}
         uses: actions/setup-node@v4
         with:
           node-version: ${{ matrix.node-version }}
           cache: 'pnpm'
-          
+
+      - name: Cache turbo
+        uses: actions/cache@v4
+        with:
+          path: .turbo
+          key: turbo-${{ runner.os }}-${{ hashFiles('pnpm-lock.yaml') }}-${{ github.sha }}
+          restore-keys: |
+            turbo-${{ runner.os }}-${{ hashFiles('pnpm-lock.yaml') }}-
+            turbo-${{ runner.os }}-
+
       - name: Install dependencies
         run: pnpm install
 
       - name: Lint
         run: pnpm lint
-        
+
       - name: Build
         run: pnpm build
-        
+
       - name: Type check
         run: pnpm typecheck
-        
+
       - name: Test
-        run: pnpm test
+        run: pnpm test

packages/core/src/__tests__/e2e-force-reindex.test.ts

@@ -37,6 +37,9 @@ describeE2E('E2E: Force re-index', () => {
 
     await indexer.initialize();
     await indexer.index();
+
+    // Allow Antfly to finish embedding before running queries
+    await new Promise((r) => setTimeout(r, 2000));
   }, 60_000);
 
   afterAll(async () => {

packages/core/src/__tests__/e2e-incremental.test.ts

@@ -33,6 +33,9 @@ describeE2E('E2E: Incremental indexing', () => {
 
     await indexer.initialize();
     await indexer.index();
+
+    // Allow Antfly to finish embedding before running queries
+    await new Promise((r) => setTimeout(r, 2000));
   }, 60_000);
 
   afterAll(async () => {

packages/core/src/__tests__/e2e-index-dev-agent.test.ts

@@ -0,0 +1,35 @@
+/**
+ * MCP Tools Regression — verifies exactly 6 built-in adapters survive Phase 2 cleanup.
+ *
+ * This test catches accidental re-introduction of removed adapters (History, GitHub,
+ * Plan, Explore) and ensures no adapters are silently dropped.
+ */
+
+import { describe, expect, it } from 'vitest';
+import * as builtIn from '../built-in/index.js';
+
+const adapterNames = Object.keys(builtIn).filter((k) => k.endsWith('Adapter'));
+
+describe('MCP tools regression (post Phase 2)', () => {
+  it('barrel exports exactly 6 adapter classes', () => {
+    expect(adapterNames).toHaveLength(6);
+  });
+
+  it.each([
+    'HealthAdapter',
+    'InspectAdapter',
+    'MapAdapter',
+    'RefsAdapter',
+    'SearchAdapter',
+    'StatusAdapter',
+  ])('exports %s', (name) => {
+    expect(adapterNames).toContain(name);
+  });
+
+  it.each(['HistoryAdapter', 'GitHubAdapter', 'PlanAdapter', 'ExploreAdapter'])(
+    'does NOT export removed %s',
+    (name) => {
+      expect(adapterNames).not.toContain(name);
+    }
+  );
+});