Initial commit: RA-H Open Source Edition

Local-first knowledge management system with BYO API keys.

Features:
- 3-panel UI (Nodes | Focus | Helpers)
- SQLite + sqlite-vec for vector search
- Agent system (Easy/Hard mode orchestrators)
- Content extraction (YouTube, PDF, web)
- Integrate workflow for connection discovery
- Dimension system with auto-assignment

Tech stack:
- Next.js 15 + TypeScript + Tailwind CSS
- Anthropic (Claude) + OpenAI (GPT) via Vercel AI SDK

Setup:
  npm install && npm rebuild better-sqlite3
  scripts/dev/bootstrap-local.sh
  npm run dev

MIT License

src/services/database/index.ts

@@ -0,0 +1,70 @@
+// Service instances
+export { nodeService, NodeService } from './nodes';
+export { chunkService, ChunkService } from './chunks';
+export { edgeService, EdgeService } from './edges';
+export { dimensionService, DimensionService } from './dimensionService';
+// export { HelperService } from './helpers'; // Removed - migrated to JSON-based service
+
+// Types
+export * from '@/types/database';
+
+// Health check utility
+export async function checkDatabaseHealth(): Promise<{
+  connected: boolean;
+  vectorExtension: boolean;
+  tablesExist: boolean;
+  error?: string;
+}> {
+  try {
+    return checkSQLiteDatabaseHealth();
+  } catch (error) {
+    return {
+      connected: false,
+      vectorExtension: false,
+      tablesExist: false,
+      error: error instanceof Error ? error.message : 'Unknown error'
+    };
+  }
+}
+
+async function checkSQLiteDatabaseHealth(): Promise<{
+  connected: boolean;
+  vectorExtension: boolean;
+  tablesExist: boolean;
+  error?: string;
+}> {
+  try {
+    const { getSQLiteClient } = await import('./sqlite-client');
+    const sqlite = getSQLiteClient();
+    
+    const connected = await sqlite.testConnection();
+    if (!connected) {
+      return {
+        connected: false,
+        vectorExtension: false,
+        tablesExist: false,
+        error: 'SQLite connection failed'
+      };
+    }
+
+    const vectorExtension = await sqlite.checkVectorExtension();
+    
+    // Check if main tables exist
+    const tables = await sqlite.checkTables();
+    const requiredTables = ['nodes', 'chunks', 'edges'];
+    const tablesExist = requiredTables.every(table => tables.includes(table));
+
+    return {
+      connected,
+      vectorExtension,
+      tablesExist
+    };
+  } catch (error) {
+    return {
+      connected: false,
+      vectorExtension: false,
+      tablesExist: false,
+      error: error instanceof Error ? error.message : 'Unknown error'
+    };
+  }
+}