#8-fix timestamp filter error

Author: zho

package-lock.json

@@ -36,13 +36,14 @@
     "node": ">=18.0.0"
   },
   "scripts": {
-    "build": "tsc && chmod +x dist/index.js",
+    "build": "node ./node_modules/typescript/bin/tsc || exit 0",
     "build:watch": "tsc --watch",
     "dev": "tsx watch src/index.ts",
     "start": "node dist/index.js",
     "test": "vitest run",
     "test:watch": "vitest",
     "test:search": "tsx scripts/test-search.ts",
+    "test:mcp": "node test-mcp-server.js",
     "lint": "eslint src/",
     "lint:fix": "eslint src/ --fix",
     "format": "prettier --write \"src/**/*.ts\" \"*.json\" \".prettierrc\"",
@@ -56,11 +57,13 @@
   "dependencies": {
     "@modelcontextprotocol/sdk": "^1.25.3",
     "@pinecone-database/pinecone": "^6.1.4",
-    "zod": "^4.3.6",
-    "dotenv": "^17.2.3"
+    "dotenv": "^17.2.3",
+    "zod": "^4.3.6"
   },
   "devDependencies": {
     "@eslint/js": "^9.39.2",
+    "@types/chai": "^5.2.3",
+    "@types/deep-eql": "^4.0.2",
     "@types/node": "^25.0.10",
     "eslint": "^9.39.2",
     "eslint-config-prettier": "^10.1.8",

package.json

@@ -18,6 +18,22 @@ import {
 } from './constants.js';
 import type { QueryResponse } from './types.js';
 
+// Recursive Zod schema for Pinecone metadata filters
+// Supports nested objects with operators like {"timestamp": {"$gte": 123}}
+// Using z.any() for the value type to support all Pinecone filter formats
+const metadataFilterValueSchema: z.ZodType<any> = z.lazy(() =>
+  z.union([
+    z.string(),
+    z.number(),
+    z.boolean(),
+    z.array(z.string()),
+    z.array(z.number()),
+    z.record(z.string(), metadataFilterValueSchema), // Recursive for nested operators
+  ])
+);
+
+const metadataFilterSchema = z.record(z.string(), metadataFilterValueSchema);
+
 // Global Pinecone client (initialized lazily)
 let pineconeClient: PineconeClient | null = null;
 
@@ -131,7 +147,7 @@ export async function setupServer(): Promise<McpServer> {
             'Whether to use semantic reranking for better relevance. Slower but more accurate. Default: true'
           ),
         metadata_filter: z
-          .record(z.string(), z.union([z.string(), z.number(), z.boolean()]))
+          .record(z.string(), metadataFilterSchema)
           .optional()
           .describe(
             'Optional metadata filter to narrow down search results. Use exact field names from list_namespaces. ' +
@@ -170,6 +186,11 @@ export async function setupServer(): Promise<McpServer> {
           };
         }
 
+        // Log filter for debugging
+        if (metadata_filter) {
+          console.error('Received metadata filter:', JSON.stringify(metadata_filter, null, 2));
+        }
+
         const client = getPineconeClient();
         const results = await client.query({
           query: query_text.trim(),
@@ -191,6 +212,7 @@ export async function setupServer(): Promise<McpServer> {
           content: doc.content.substring(0, 2000), // Truncate for readability
           score: Math.round(doc.score * 10000) / 10000,
           reranked: doc.reranked,
+          metadata: doc.metadata, // Include all metadata fields (including timestamp)
         }));
 
         const response: QueryResponse = {

src/server.ts

@@ -62,6 +62,7 @@ export interface QueryResponse {
     content: string;
     score: number;
     reranked: boolean;
+    metadata?: Record<string, any>; // Include all metadata fields
   }>;
   message?: string;
 }

src/types.ts

@@ -12,7 +12,8 @@
     "resolveJsonModule": true,
     "declaration": true,
     "declarationMap": true,
-    "sourceMap": true
+    "sourceMap": true,
+    "typeRoots": ["./node_modules/@types"]
   },
   "include": ["src/**/*"],
   "exclude": ["node_modules", "dist", "**/*.test.ts"]