diff --git a/vibe-check-runner.js b/vibe-check-runner.js
index f56ee94..cd38c61 100644
--- a/vibe-check-runner.js
+++ b/vibe-check-runner.js
@@ -2,6 +2,7 @@ import { Project, SyntaxKind } from 'ts-morph';
 import fs from 'node:fs';
 import fsPromises from 'node:fs/promises';
 import path from 'node:path';
+import { pathToFileURL } from 'node:url';
 import { execFileSync } from 'node:child_process';
 import { GoogleGenAI } from '@google/genai';
 
@@ -9,7 +10,7 @@ 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();
@@ -231,8 +232,6 @@ async function runVibeCheck() {
     return;
   }
 
-  const project = new Project();
-
   // Configure git user for commits
   try {
     execFileSync('git', ['config', '--global', 'user.name', 'github-actions[bot]']);
@@ -241,10 +240,10 @@ async function runVibeCheck() {
     console.warn('Failed to configure git user. If running locally, this is expected.');
   }
 
+  // Deduplicate by tech and collect markdown contents
+  const filesByTech = {};
   for (const file of modifiedFiles) {
-    console.log(`Processing ${file}...`);
-
-    if (!fs.existsSync(file)) {
+    if (!(await fileOrDirExists(file))) {
       console.log(`File ${file} does not exist. Skipping.`);
       continue;
     }
@@ -265,28 +264,64 @@ async function runVibeCheck() {
       }
     }
 
-    const mdContent = await fsPromises.readFile(file, 'utf-8');
+    if (!filesByTech[tech]) filesByTech[tech] = [];
+    filesByTech[tech].push(file);
+  }
 
-    await syncBenchmarks(tech, mdContent);
+  // Sync benchmarks sequentially per tech
+  for (const [tech, files] of Object.entries(filesByTech)) {
+    const mdContents = await Promise.all(files.map(f => fsPromises.readFile(f, 'utf-8')));
+    const concatenatedContent = mdContents.join('\n\n--- \n\n');
+    await syncBenchmarks(tech, concatenatedContent);
+  }
 
-    const suitePath = path.join('benchmarks', 'suites', `${tech}.json`);
-    if (!fs.existsSync(suitePath)) {
-      console.log(`No benchmark suite found for ${tech}. Skipping.`);
-      continue;
-    }
+  // Concurrent Execution and Validation
+  const validationResults = await Promise.all(
+    modifiedFiles.map(async (file) => {
+      let tech = '';
+      if (file.includes('/angular/')) tech = 'angular';
+      else if (file.includes('/nestjs/')) tech = 'nestjs';
+      else if (file.includes('/typescript/')) tech = 'typescript';
+      else if (file.includes('/express/')) tech = 'express';
+      else if (file.includes('/nodejs/')) tech = 'nodejs';
+      else {
+        const parts = file.split('/');
+        tech = parts.length > 1 ? parts[1] : '';
+      }
 
-    const suiteConfig = JSON.parse(await fsPromises.readFile(suitePath, 'utf-8'));
+      if (!tech) return { file, score: -1, breakdown: null, error: 'No tech identified' };
 
-    const generatedCode = await simulateAIGeneration(suiteConfig.golden_prompt, tech, mdContent);
+      const suitePath = path.join('benchmarks', 'suites', `${tech}.json`);
+      if (!(await fileOrDirExists(suitePath))) {
+        return { file, score: -1, breakdown: null, error: `No benchmark suite found for ${tech}.` };
+      }
 
-    if (!generatedCode) {
-      console.error(`Failed to generate code for ${tech}.`);
+      const suiteConfig = JSON.parse(await fsPromises.readFile(suitePath, 'utf-8'));
+      const mdContent = await fsPromises.readFile(file, 'utf-8');
+
+      const generatedCode = await simulateAIGeneration(suiteConfig.golden_prompt, tech, mdContent);
+
+      if (!generatedCode) {
+         return { file, score: -1, breakdown: null, error: `Failed to generate code for ${tech}.` };
+      }
+
+      const project = new Project();
+      const uniqueFilename = `temp_${tech}_${Math.random().toString(36).substring(7)}.ts`;
+      const sourceFile = project.createSourceFile(uniqueFilename, generatedCode, { overwrite: true });
+      const { total: score, breakdown } = analyzeAST(sourceFile, tech);
+
+      return { file, tech, score, breakdown, generatedCode };
+    })
+  );
+
+  // Sequential Execution of stateful side-effects
+  for (const result of validationResults) {
+    if (result.error) {
+      console.log(result.error);
       continue;
     }
 
-    const sourceFile = project.createSourceFile(`temp_${tech}.ts`, generatedCode, { overwrite: true });
-    const { total: score, breakdown } = analyzeAST(sourceFile, tech);
-
+    const { file, tech, score, breakdown, generatedCode } = result;
     console.log(`Fidelity Score for ${file}: ${score}%`);
     console.log(`Breakdown:`, breakdown);
 
@@ -305,7 +340,7 @@ async function runVibeCheck() {
         // Only commit if there are changes (badge might already be there)
         const status = execFileSync('git', ['status', '--porcelain'], { encoding: 'utf-8' });
         if (status.includes(file) || status.includes('benchmarks/')) {
-           execFileSync('git', ['commit', '-m', '[chore: benchmark-sync]']);
+           execFileSync('git', ['commit', '-m', '[chore: fidelity-pass]']);
            execFileSync('git', ['push', 'origin', 'HEAD:main']);
         } else {
            console.log(`Badge already present in ${file}, skipping commit.`);
@@ -338,4 +373,6 @@ 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);
+}
\ No newline at end of file