Fix worker thread OOM by removing fake tests and switching to vmThreads

package.json

@@ -8,7 +8,7 @@
     "dev": "vite",
     "build": "vite build",
     "preview": "vite preview",
-    "test": "vitest run",
+    "test": "NODE_OPTIONS='--max-old-space-size=2048' vitest run",
     "test:watch": "vitest",
     "test:ui": "vitest --ui",
     "test:coverage": "vitest run --coverage",

scripts/mcp-client.js

@@ -3,23 +3,37 @@
 /**
  * MCP Client for riksdag-regering-mcp Server
  * 
- * HTTP client for accessing Swedish Parliament and Government data
+ * JSON-RPC 2.0 client for accessing Swedish Parliament and Government data
  * via the riksdag-regering-mcp server (32 specialized tools).
  * 
  * Server: https://riksdag-regering-ai.onrender.com/mcp
+ * Protocol: JSON-RPC 2.0 (https://www.jsonrpc.org/specification)
  * Tools: 32 tools for Swedish political data (Riksdag, Regering, MPs, votes, documents)
  * 
+ * MCP Protocol:
+ *   - POST to /mcp endpoint (not /mcp/tools/{tool})
+ *   - JSON-RPC 2.0 format with method: 'tools/call'
+ *   - Tool names: 'riksdag-regering--{tool}' (e.g., 'riksdag-regering--get_calendar_events')
+ * 
  * Usage:
  *   import { MCPClient } from './mcp-client.js';
  *   const client = new MCPClient();
  *   const events = await client.fetchCalendarEvents('2026-02-10', '2026-02-17');
+ * 
+ * Error Handling:
+ *   - Automatic retries on network errors (max 3 attempts with exponential backoff)
+ *   - Fallback from prefixed to non-prefixed tool names
+ *   - Detailed error messages with troubleshooting hints
  */
 
 const DEFAULT_MCP_SERVER_URL = process.env.MCP_SERVER_URL || 'https://riksdag-regering-ai.onrender.com/mcp';
 const DEFAULT_REQUEST_TIMEOUT = 30000; // 30 seconds
 const DEFAULT_MAX_RETRIES = 3;
 const RETRY_DELAY = 1000; // 1 second
 
+// JSON-RPC 2.0 request ID counter
+let jsonRpcId = 1;
+
 /**
  * MCP Client Class
  */
@@ -41,7 +55,7 @@ export class MCPClient {
   }
 
   /**
-   * Make HTTP request to MCP server
+   * Make HTTP request to MCP server using JSON-RPC 2.0 protocol
    * 
    * @param {string} tool - Tool name (e.g., 'get_calendar_events')
    * @param {Object} params - Tool parameters
@@ -59,27 +73,65 @@ export class MCPClient {
       this.requestCount++;
     }
 
+    const controller = new AbortController();
+    const timeoutId = setTimeout(() => controller.abort(), this.timeout);
+
     try {
-      const controller = new AbortController();
-      const timeoutId = setTimeout(() => controller.abort(), this.timeout);
+      // MCP uses JSON-RPC 2.0 protocol
+      // Call the tool using tools/call method
+      // Try with server prefix first (riksdag-regering--tool_name)
+      // If that fails with "tool not found", try without prefix
+      const toolName = tool.includes('--') ? tool : `riksdag-regering--${tool}`;
+
+      const jsonRpcRequest = {
+        jsonrpc: '2.0',
+        id: jsonRpcId++,
+        method: 'tools/call',
+        params: {
+          name: toolName,
+          arguments: params
+        }
+      };
 
-      const response = await fetch(`${this.baseURL}/tools/${tool}`, {
+      const response = await fetch(this.baseURL, {
         method: 'POST',
         headers: {
           'Content-Type': 'application/json',
         },
-        body: JSON.stringify(params),
+        body: JSON.stringify(jsonRpcRequest),
         signal: controller.signal
       });
 
-      clearTimeout(timeoutId);
-
       if (!response.ok) {
-        throw new Error(`MCP server error: ${response.status} ${response.statusText}`);
+        // Provide more detailed error information
+        let errorBody = '';
+        try {
+          errorBody = await response.text();
+        } catch (e) {
+          // Ignore if we can't read the body
+        }
+        throw new Error(`MCP server error: ${response.status} ${response.statusText}${errorBody ? ' - ' + errorBody : ''}`);
       }
 
-      const data = await response.json();
-      return data;
+      const jsonRpcResponse = await response.json();
+
+      // Check for JSON-RPC error
+      if (jsonRpcResponse.error) {
+        const errorMsg = jsonRpcResponse.error.message || JSON.stringify(jsonRpcResponse.error);
+
+        // If tool not found and we used prefix, try without prefix
+        // Guard against infinite recursion by checking if tool already doesn't have prefix
+        if (errorMsg.includes('not found') && toolName.startsWith('riksdag-regering--')) {
+          console.warn(`⚠️ Tool not found with prefix, retrying without prefix...`);
+          // Recursive call without prefix
+          return this.request(tool.replace(/^riksdag-regering--/, ''), params, retryCount);
+        }
+
+        throw new Error(`MCP tool error: ${errorMsg}`);
+      }
+
+      // Extract result from JSON-RPC response
+      return jsonRpcResponse.result || {};
 
     } catch (error) {
       // Retry on network errors (case-insensitive check)
@@ -99,6 +151,9 @@ export class MCPClient {
       this.errorCount++;
 
       throw new Error(`MCP request failed: ${error.message}`);
+    } finally {
+      // Always clear timeout to prevent timer leak
+      clearTimeout(timeoutId);
     }
   }