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.unit.config.ts

@@ -0,0 +1,53 @@
+import { defineConfig } from 'vitest/config'
+
+/**
+ * Unit Test Configuration - NO REAL AI MODELS
+ * 
+ * Based on industry practices from HuggingFace, sentence-transformers, etc.
+ * Unit tests use mocks to avoid memory issues entirely.
+ */
+export default defineConfig({
+  test: {
+    globals: true,
+    setupFiles: ['./tests/setup-unit.ts'],
+    environment: 'node',
+    
+    // UNIT TESTS: Fast execution, no memory issues
+    testTimeout: 30000,       // 30 seconds
+    hookTimeout: 10000,       // 10 seconds
+    
+    // Include only unit tests
+    include: [
+      'tests/unit/**/*.test.ts',
+      'tests/**/*.unit.test.ts'
+    ],
+    
+    // Exclude integration tests
+    exclude: [
+      'tests/integration/**',
+      'tests/**/*.integration.test.ts',
+      'tests/**/*.e2e.test.ts',
+      'node_modules/**'
+    ],
+    
+    // Parallel execution OK for unit tests
+    pool: 'threads',
+    maxConcurrency: 4,
+    fileParallelism: true,
+    
+    reporters: ['verbose'],
+    
+    // Coverage for unit tests
+    coverage: {
+      enabled: true,
+      provider: 'v8',
+      reporter: ['text', 'html'],
+      include: ['src/**/*.ts'],
+      exclude: [
+        'src/**/*.test.ts',
+        'src/embeddings/worker-*.ts',  // Skip worker files
+        'dist/**'
+      ]
+    }
+  }
+})