CHECKPOINT: Industry-standard 3-tier testing implemented

✅ MAJOR BREAKTHROUGH - Session 5 Success:
- Unit tests: 18/19 passing with mocked AI (<500MB RAM)
- Integration tests: Real AI models loading successfully
- Core features: Real embeddings, CRUD operations verified
- Architecture: All 11 augmentations, worker threads operational

📋 CRITICAL FINDINGS:
- Real AI models load and cache correctly
- 384D embeddings generate properly
- Core CRUD operations work with real transformers
- Memory management effective for production

⚠️ RELEASE BLOCKER IDENTIFIED:
- Search operations timeout in test environment
- Affects: search(), find(), clustering functionality
- Root cause: Likely worker communication during HNSW search
- Priority: MUST fix before 2.0.0 release

🎯 NEXT SESSION PRIORITIES:
1. Debug and fix search timeout issue
2. Verify search/find/clustering work in production
3. Final documentation cleanup
4. Release preparation

Confidence: 90% ready (pending search functionality verification)

vitest.integration.config.ts

@@ -0,0 +1,55 @@
+import { defineConfig } from 'vitest/config'
+
+/**
+ * Integration Test Configuration - REAL AI MODELS
+ * 
+ * Based on industry practices: fewer tests, real models, high memory
+ * Only run critical AI functionality to verify production readiness
+ */
+export default defineConfig({
+  test: {
+    globals: true,
+    setupFiles: ['./tests/setup-integration.ts'],
+    environment: 'node',
+    
+    // INTEGRATION TESTS: Real AI, need time and memory
+    testTimeout: 300000,      // 5 minutes per test
+    hookTimeout: 120000,      // 2 minutes for setup
+    teardownTimeout: 30000,
+    
+    // Include only integration tests  
+    include: [
+      'tests/integration/**/*.test.ts',
+      'tests/**/*.integration.test.ts'
+    ],
+    
+    // CRITICAL: Sequential execution to prevent memory exhaustion
+    pool: 'forks',
+    poolOptions: {
+      forks: {
+        maxForks: 1,        // One test at a time
+        minForks: 1,
+        singleFork: true,   // Absolute isolation
+        isolate: true
+      }
+    },
+    
+    // No parallelism
+    maxConcurrency: 1,
+    fileParallelism: false,
+    
+    // Minimal reporting to reduce memory
+    reporters: process.env.CI ? ['dot'] : ['basic'],
+    
+    // No coverage (saves memory)
+    coverage: {
+      enabled: false
+    },
+    
+    // Test sharding for CI
+    shard: process.env.VITEST_SHARD,
+    
+    // Retry once for flaky AI tests
+    retry: 1
+  }
+})