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.config.ts

@@ -1,18 +1,54 @@
 import { defineConfig } from 'vitest/config'
 
+/**
+ * Vitest Configuration - Optimized for Memory-Intensive Tests
+ * 
+ * Handles ONNX transformer model testing (4-8GB memory requirement)
+ * Based on 2024-2025 best practices
+ */
 export default defineConfig({
   test: {
     globals: true,
     setupFiles: ['./tests/setup.ts'],
-    testTimeout: 30000,
-    hookTimeout: 30000,
     environment: 'node',
+    
+    // MEMORY OPTIMIZATION: Use forks for better memory isolation
+    pool: 'forks',
+    poolOptions: {
+      forks: {
+        maxForks: 1,      // One test file at a time
+        minForks: 1,
+        singleFork: true, // Sequential execution
+        isolate: true     // Isolate test files
+      }
+    },
+    
+    // TIMEOUTS: Extended for ONNX model loading
+    testTimeout: 120000,  // 2 minutes per test
+    hookTimeout: 60000,   // 1 minute for hooks
+    teardownTimeout: 10000,
+    
+    // PARALLELISM: Disabled to prevent memory exhaustion
+    maxConcurrency: 1,
+    fileParallelism: false,
+    
+    // INCLUDE/EXCLUDE
     include: ['tests/**/*.{test,spec}.{js,ts}'],
     exclude: [
       'node_modules/**',
       'dist/**',
-      'scripts/**'
+      'scripts/**',
+      '**/*.browser.test.ts'
     ],
-    reporters: ['default']
+    
+    // REPORTERS: Dot for CI, verbose for local
+    reporters: process.env.CI ? ['dot'] : ['default'],
+    
+    // RETRY: Once in CI for flaky tests
+    retry: process.env.CI ? 1 : 0,
+    
+    // SHARDING: Support test splitting
+    // Use: VITEST_SHARD=1/4 npm test
+    shard: process.env.VITEST_SHARD
   }
 })