diff --git a/packages/core/scripts/build.ts b/packages/core/scripts/build.ts
index 38166fa..06e9329 100644
--- a/packages/core/scripts/build.ts
+++ b/packages/core/scripts/build.ts
@@ -8,6 +8,7 @@ import { pathAliasPlugin } from "./esbuild-plugin-path-alias";
 const watch = process.argv.includes("--watch");
 
 // Get the absolute path to the src directory (ES module compatible)
+// @ts-ignore
 const __filename = fileURLToPath(import.meta.url);
 const __dirname = path.dirname(__filename);
 const baseUrl = path.resolve(__dirname, "..");
diff --git a/packages/core/src/plugins/output/temp-file-handler.ts b/packages/core/src/plugins/output/temp-file-handler.ts
index fa1fea5..3265e16 100644
--- a/packages/core/src/plugins/output/temp-file-handler.ts
+++ b/packages/core/src/plugins/output/temp-file-handler.ts
@@ -41,7 +41,7 @@ export class TempFileOutputHandler implements OutputHandler {
     this.config = {
       subdirectory: 'claude-code-router',
       extension: 'json',
-      includeTimestamp: true,
+      includeTimestamp: false,
       prefix: 'session',
       ...config
     };
diff --git a/packages/core/src/plugins/token-speed.ts b/packages/core/src/plugins/token-speed.ts
index 60ab745..482338a 100644
--- a/packages/core/src/plugins/token-speed.ts
+++ b/packages/core/src/plugins/token-speed.ts
@@ -160,13 +160,16 @@ export const tokenSpeedPlugin: CCRPlugin = {
 
     // Add onRequest hook to capture actual request start time (before processing)
     fastify.addHook('onRequest', async (request) => {
+      const url = new URL(`http://127.0.0.1${request.url}`);
+      if (!url.pathname.endsWith("/v1/messages")) return;
       (request as any).requestStartTime = performance.now();
     });
 
     // Add onSend hook to intercept both streaming and non-streaming responses
     fastify.addHook('onSend', async (request, _reply, payload) => {
+      const startTime = (request as any).requestStartTime;
+      if (!startTime) return;
       const requestId = (request as any).id || Date.now().toString();
-      const startTime = (request as any).requestStartTime || performance.now();
 
       // Extract session ID from request body metadata
       let sessionId: string | undefined;
@@ -177,8 +180,8 @@ export const tokenSpeedPlugin: CCRPlugin = {
           sessionId = match ? match[1] : undefined;
         }
       } catch (error) {
-        // Ignore errors extracting session ID
       }
+      if (!sessionId) return;
 
       // Get tokenizer for this specific request
       const tokenizer = await getTokenizerForRequest(request);