diff --git a/vibe-check-runner.js b/vibe-check-runner.js
index f56ee94..b1b4df2 100644
--- a/vibe-check-runner.js
+++ b/vibe-check-runner.js
@@ -4,12 +4,13 @@ import fsPromises from 'node:fs/promises';
 import path from 'node:path';
 import { execFileSync } from 'node:child_process';
 import { GoogleGenAI } from '@google/genai';
+import { pathToFileURL } from 'node:url';
 
 const ai = new GoogleGenAI({ apiKey: process.env.GOOGLE_AI_API_KEY });
 
 // Constants for scoring
 
-async function fileOrDirExists(filePath) {
+export async function fileOrDirExists(filePath) {
   try {
     await fsPromises.stat(filePath);
     return true;
@@ -25,7 +26,7 @@ const SCORES = {
   EFFICIENCY: 10,
 };
 
-function getModifiedFiles() {
+export function getModifiedFiles() {
   try {
     // In CI (daily run), check files modified in the last 24 hours.
     // We filter for non-empty lines that end in .md and are in frontend/ or backend/
@@ -43,7 +44,7 @@ function getModifiedFiles() {
   }
 }
 
-async function syncBenchmarks(tech, mdContent, retries = 5, delay = 10000) {
+export async function syncBenchmarks(tech, mdContent, retries = 5, delay = 10000) {
   try {
     const prompt = `Based on the following documentation:\n\n${mdContent}\n\n1. Generate a "Golden Prompt" (a comprehensive instruction for generating a typical module using this technology) in JSON format: {"golden_prompt": "...", "tech": "${tech}"}\n2. Generate a JSON Schema for TS-Morph AST validation rules enforcing DDD/FSD layers and strict typing for this technology. The generated JSON schema must explicitly follow a nested structure compatible with \`analyzeAST\`. Format: {"$schema": "...", "type": "object", "properties": {"forbidden_types": {"contains": {"enum": ["any"]}}}}.\n\nRespond strictly with ONLY a JSON array containing these two objects in order. No markdown wrappers.`;
     const response = await ai.models.generateContent({
@@ -85,7 +86,7 @@ async function syncBenchmarks(tech, mdContent, retries = 5, delay = 10000) {
   }
 }
 
-async function simulateAIGeneration(goldenPrompt, tech, mdContent, retries = 5, delay = 10000) {
+export async function simulateAIGeneration(goldenPrompt, tech, mdContent, retries = 5, delay = 10000) {
   try {
     const prompt = `${goldenPrompt}\n\nConstraints and instructions from the following documentation:\n\n${mdContent}\n\nGenerate ONLY raw code. No markdown formatting, no explanations.`;
     const response = await ai.models.generateContent({
@@ -110,7 +111,7 @@ async function simulateAIGeneration(goldenPrompt, tech, mdContent, retries = 5,
   }
 }
 
-function analyzeAST(sourceFile, tech) {
+export function analyzeAST(sourceFile, tech) {
   let score = {
     arch: SCORES.ARCH,
     type: SCORES.TYPE,
@@ -222,7 +223,7 @@ function analyzeAST(sourceFile, tech) {
   return { total, breakdown: score };
 }
 
-async function runVibeCheck() {
+export async function runVibeCheck() {
   console.log('Running Vibe-Check Runner...');
 
   const modifiedFiles = getModifiedFiles();
@@ -241,12 +242,15 @@ async function runVibeCheck() {
     console.warn('Failed to configure git user. If running locally, this is expected.');
   }
 
-  for (const file of modifiedFiles) {
+  const filesByTech = new Map();
+
+  // Read all files concurrently and group by tech
+  await Promise.all(modifiedFiles.map(async (file) => {
     console.log(`Processing ${file}...`);
 
-    if (!fs.existsSync(file)) {
+    if (!await fileOrDirExists(file)) {
       console.log(`File ${file} does not exist. Skipping.`);
-      continue;
+      return;
     }
 
     let tech = '';
@@ -261,39 +265,71 @@ async function runVibeCheck() {
       if (parts.length > 1) {
         tech = parts[1];
       } else {
-        continue;
+        return;
       }
     }
 
     const mdContent = await fsPromises.readFile(file, 'utf-8');
 
-    await syncBenchmarks(tech, mdContent);
+    if (!filesByTech.has(tech)) {
+      filesByTech.set(tech, []);
+    }
+    filesByTech.get(tech).push({ file, mdContent });
+  }));
+
+  // Sync benchmarks sequentially per tech to deduplicate
+  const techMdContents = new Map();
+  for (const [tech, files] of filesByTech.entries()) {
+    const combinedContent = files.map(f => f.mdContent).join('\n\n---\n\n');
+    techMdContents.set(tech, combinedContent);
+    await syncBenchmarks(tech, combinedContent);
+  }
+
+  const fileResults = [];
 
+  // Generate code and analyze AST concurrently
+  const processingPromises = [];
+  for (const [tech, files] of filesByTech.entries()) {
     const suitePath = path.join('benchmarks', 'suites', `${tech}.json`);
-    if (!fs.existsSync(suitePath)) {
-      console.log(`No benchmark suite found for ${tech}. Skipping.`);
+
+    if (!await fileOrDirExists(suitePath)) {
+      console.log(`No benchmark suite found for ${tech}. Skipping generation/analysis.`);
       continue;
     }
 
     const suiteConfig = JSON.parse(await fsPromises.readFile(suitePath, 'utf-8'));
 
-    const generatedCode = await simulateAIGeneration(suiteConfig.golden_prompt, tech, mdContent);
+    for (const { file, mdContent } of files) {
+      processingPromises.push((async () => {
+        const generatedCode = await simulateAIGeneration(suiteConfig.golden_prompt, tech, mdContent);
 
-    if (!generatedCode) {
-      console.error(`Failed to generate code for ${tech}.`);
-      continue;
+        if (!generatedCode) {
+          console.error(`Failed to generate code for ${tech} (File: ${file}).`);
+          return null;
+        }
+
+        const sourceFile = project.createSourceFile(`temp_${tech}_${Buffer.from(file).toString('base64').replace(/=/g, '')}.ts`, generatedCode, { overwrite: true });
+        const { total: score, breakdown } = analyzeAST(sourceFile, tech);
+
+        console.log(`Fidelity Score for ${file}: ${score}%`);
+        console.log(`Breakdown:`, breakdown);
+
+        return { file, score, breakdown, generatedCode, mdContent };
+      })());
     }
+  }
 
-    const sourceFile = project.createSourceFile(`temp_${tech}.ts`, generatedCode, { overwrite: true });
-    const { total: score, breakdown } = analyzeAST(sourceFile, tech);
+  const results = await Promise.all(processingPromises);
 
-    console.log(`Fidelity Score for ${file}: ${score}%`);
-    console.log(`Breakdown:`, breakdown);
+  // Handle side-effects sequentially
+  for (const result of results) {
+    if (!result) continue;
+    const { file, score, breakdown, generatedCode, mdContent } = result;
 
     if (score >= 95) {
       console.log(`✅ Validation passed for ${file}. Updating badge and auto-committing.`);
 
-      let content = await fsPromises.readFile(file, 'utf-8');
+      let content = mdContent;
       if (!content.includes('[![Vibe-Coding Verified]')) {
          content = content.replace(/^# /, '[![Vibe-Coding Verified](https://img.shields.io/badge/Vibe--Coding-Verified-brightgreen?style=for-the-badge)](#)\n\n# ');
          await fsPromises.writeFile(file, content);
@@ -338,4 +374,6 @@ async function runVibeCheck() {
   }
 }
 
-runVibeCheck().catch(console.error);
\ No newline at end of file
+if (import.meta.url === pathToFileURL(process.argv[1]).href) {
+  runVibeCheck().catch(console.error);
+}